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Title: The effect of nozzle design on the coefficient of efflux of automatic sprinklers
Creator: Alling, H. M, Daniels, M. F, Doering, R. C
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/effectofnozzlede00alli
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Fire Protection Engineering,...
Show morehttp://www.archive.org/details/effectofnozzlede00alli
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Fire Protection Engineering, 1911
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Title: EFFICIENT 3D TOPOLOGY OPTIMIZATION THROUGH B-SPLINES
Creator: Wang, Mingming
Date: 2013, 2013-12
Description: In this thesis, an e cient approach for topology optimization of three-dimensional (3D) problems has been proposed where the density...
Show moreIn this thesis, an e cient approach for topology optimization of three-dimensional (3D) problems has been proposed where the density representation is based on B-splines. Compared with the usual density representation and ltering in topology optimization, the new B-spline based approach is advantageous in both memory usage and CPU time. This is achieved through the use of tensor product representation of density distribution. As such, the storage of ltered density variables is linear with respect to the e ective lter size instead of the cubic order in the usual density lter. Numerical examples of 3D topology optimization of minimal compliance and heat conduction problems are demonstrated. We also show that our B-spline based density representation is especially bene cial to topology optimization methods such as the multiple density per element scheme where the storage of ltered density variables is a challenge. We show that the B-spline approach is also applicable to the multi-resolution scheme.
M.S. in Mechanical Engineering, December 2013
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Title: FRACTURE TOUGHNESS EVALUATION OF FIVE MICROALLOYED PLATE STEELS FOR WIND TOWER APPLICATIONS
Creator: Gaisina, Vladilena
Date: 2015, 2015-05
Description: Five microalloyed plate steels were evaluated for impact and fracture tough- ness. Results at room and low temperatures were compared. These...
Show moreFive microalloyed plate steels were evaluated for impact and fracture tough- ness. Results at room and low temperatures were compared. These steels are com- monly ordered to meet ASTM A572/A709 Grade 50 or EN 10025-2 Grade S355 requirements in the normalized condition for wind tower and other structural ap- plications. One of the ve steels was in the normalized condition, while the rest were left as-rolled. Furthermore, the e ects of carbon content and alloy additions are investigated, with niobium and vanadium as the principal strengthening elements. Impact toughness testing using Charpy V-notch specimens was performed to deter- mine the ductile-to-brittle transition temperature (DBTT). Fracture toughness was measured using the J-integral method. The critical fracture energy Jc was converted to the critical plane strain stress intensity factor KIc if validity requirements were met. Compact tension samples of each steel were tested at room temperature and at -40oC. The results of room temperature tests are compared to those obtained in previous work. The steels with niobium demonstrate signi cantly lower DBTT than vanadium steels. At room temperature, fracture toughness performance is comparable for low carbon grades. Among medium carbon steels, the vanadium one fares slightly better than the as-rolled niobium, with the normalized niobium steel o ering the highest room temperature fracture toughness of the three. Overall, the lower carbon content is noted to provide a signi cant increase in toughness for a modest trade-o in tensile strength.
M.S. in Material Science Engineering, May 2015
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Title: NUMERICAL MODELING AND ANALYSIS OF CAVITATION IN WATER AND LASER-INDUCED PLASMA AMPLIFICATION FOR MICROMACHINING APPLICATIONS
Creator: Dabir-moghaddam, Navid
Date: 2017, 2017-05
Description: Machining processes are needed in many industrial areas. Laser-based machining often has the advantages such as high spatial resolution, no...
Show moreMachining processes are needed in many industrial areas. Laser-based machining often has the advantages such as high spatial resolution, no mechanical tool wear, etc., and has current and potential applications in many areas. The objective of this research work is to conduct physics-based modeling studies to help the understanding of some physical processes relevant to two novel laser-based machining processes: (i) the Ultrasound-assisted water-confined laser micromachining (UWLM) process (proposed by Prof. Benxin Wu), and (ii) the Dual-pulse laser ablation and plasma amplification (LAPA) process for drilling microholes with variable diameters at different depths (proposed by Prof. Yung C. Shin). The models are developed by numerically solving the relevant governing equations, and are tested by comparing with related experimental measurements when available. The specific topics that have been studied include: (i) Bubble evolution close to a solid boundary; (ii) Ultrasound propagation and cavitation in water; (iii) Laser amplification of pre-existing plasma in a microhole and plasma interaction with the hole sidewall.
Ph.D. in Mechanical and Aerospace Engineering, May 2017
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Title: Design of a portland cement plant
Creator: Quin, H. G. R.
Date: 2009, 1906
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designofportland00quin
Thesis (B.S.)--Armour Institute of Technology

Title: Design of prepayment car for city service
Creator: Packer, Alfred Herbert
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designofprepayme00pack
Thesis (B.S.)--Armour Institute of Technology

Title: Fire extinguishing efficiency of chemical fire extinguishers of soda and acid type
Creator: Kimball, Norman F
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/fireextinguishin00kimb
Thesis (B.S.)--Armour Institute of Technology

Title: Fire extinguishers for automobiles
Creator: Gielow, W. C, Hepp, E. J
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/fireextinguisher00giel
Thesis (B.S.)--Armour Institute of Technology, 1914 B.S. in Fire Protection Engineering,...
Show morehttp://www.archive.org/details/fireextinguisher00giel
Thesis (B.S.)--Armour Institute of Technology, 1914 B.S. in Fire Protection Engineering, 1914
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Title: Distribution of water from open sprinklers on ridge poles
Creator: Evans, S. L., Mann, R. N., Marx, F. E.
Date: 2009, 1918
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/distributionofwa00evan
Thesis (B.S.)--Armour Institute of Technology

Title: Design of a foam fire extinguisher system
Creator: James, Garret B
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/designoffoamfire00jame
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaves 78-79

Title: MICRO-SCALE EHD CONDUCTION-DRIVEN PUMPING AND HEAT TRANSFER ENHANCEMENT IN SINGLE- AND TWO-PHASE SYSTEMS
Creator: Pearson, Matthew
Date: 2011-04-19, 2011-05
Description: Electrohydrodynamic (EHD) pumping methods rely on the interaction between electric fields and the flow fields of a dielectric fluid....
Show moreElectrohydrodynamic (EHD) pumping methods rely on the interaction between electric fields and the flow fields of a dielectric fluid. Conduction pumping is one EHD pumping mechanism, which offers many advantages over other EHD pumping methods (for example, a simple design, no degradation of the working fluid, and no need for a temperature gradient). Conduction pumping can be used in an adiabatic context to pump a working fluid or it can be applied to deliver substantial enhancement to single- and two-phase heat transfer processes. Experimental studies of conduction pumping to date have focused on macro-scale devices with applied voltages on the order of 10 kV. However, like many other EHD concepts, conduction pumping depends primarily on the intensity of the imposed electric field. Therefore, at the micro-scale, the reduced physical size can be accompanied by a reduction in the magnitude of the applied voltage to levels that are significantly more manageable. Furthermore, the simplicity of EHD conduction pumps, such as the lack of moving parts, high reliability, and physical compactness, make them an attractive method for pressure generation in micro-scale fluid and heat transfer devices. This experimental study examines the fundamental behavior and performance of EHD conduction pumping at the micro-scale. The pump is embedded in a rectangular, adiabatic micro-channel, and the single-phase flow and pressure generation of the pump are characterized. The EHD pumping of single- and two-phase flows in micro-channels in the presence of heat transfer is also studied and the corresponding enhancement to single- and two-phase heat transfer is quantified. In an additional study, micro-scale electrodes are embedded within a flat, heated surface to examine the ability of the conduction pump to provide electrically-enhanced wetting of the heated surface during pool boiling. A model based on hydrodynamic instability theory is generated to quantify the influence of the EHD conduction pumping on the pool boiling critical heat flux. Finally, this technology is incorporated into two unique, novel, heat transport devices akin to a heat pipe but in which the primary driving force for the liquid is conduction pumping, not capillarity.
Ph.D. in Mechanical and Aerospace Engineering, May 2011
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Title: THE STRUCTURAL AND MAGNETIC STABILITY OF SELECT FERROUS HEUSLER SYSTEMS
Creator: Hasier, John J.
Date: 2017, 2017-05
Description: Heusler based functional or smart materials are a deep well of solutions to future energy, heat transport and mechanization problems. The half...
Show moreHeusler based functional or smart materials are a deep well of solutions to future energy, heat transport and mechanization problems. The half-metallic ferromagnetic nature of these crystalline intermetallic compounds is the source of their extraordinary properties. The loss of this magnetic ordering places limits on the range of application temperatures making knowledge of the Curie point of these novel materials essential for understanding of their limitations. High throughput continuous wavelet transform spectrum analysis of magnetic balance data generated on a custom modified Setaram Setsys Evolution 16/18 Differential Scanning Calorimeter- Differential Thermal Analyzer with simultaneous Thermogravimetric Analyzer was performed on select Fe, Co and Mn based Heusler compounds. The phase stability of Co-Fe-Si compounds is explored in relation to the high-Curie Temperature Co2FeSi and Fe2CoSi compounds via generation of equilibrium ternary isothermal phase diagrams at 1160 C and 800 C to enable greater control of the microstructure for future thermomechanically processed bulk smart device fabrication.
Ph.D. in Materials Science and Engineering
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Title: ANALYSIS OF MECHANICAL NOISE GENERATION IN WIND TURBINE DRIVE TRAIN
Creator: Patel, Hirenkumar J.
Date: 2012-05-01, 2012-05
Description: The research work presented here is a part of a project, funded by U.S. Department of Energy to study mechanical noise generated by a wind...
Show moreThe research work presented here is a part of a project, funded by U.S. Department of Energy to study mechanical noise generated by a wind turbine drive train. In our study a Viryd 8 kW wind turbine drive train test bed located at the Illinois Institute of Technology was used. Various wind speeds and turbulence levels could be simulated using a computer program that is used to control the test bed. Acoustic measurements were carried out using a single microphone and a microphone array. The microphone array was used to localize noise sources on the drive train. Various beamforming algorithms such as FDBF, DAMAS2, CLSC, DAS and TIDY were used to study the noise sources. Quali cation experiments using synthetic sources showed that \Clean based on spatial coherence" beamforming algorithm localizes noise sources very accurately for narrowband frequency analysis and TIDY was found to work best for broadband analysis. The resolution of the beamform maps improved for higher frequencies of interest (>700 Hz). The continuous variable planetary (CVP) gearbox, which is a proprietary gearbox by Viryd was used in the drive train to optimize the generator rotational speed. An interesting trend was observed in active power generated for the wind speeds greater than 10 m/s, where the power does not increase signi cantly as it is regulated at 6000 Watts. CVP speed ratio, ratio of input rotational speed to output rotational speed of CVP, was also found to be having similar e ect after wind speed reaches a value of 10 m/s. Vibrations of the drive train test bed were studied using accelerometers. It was observed that the test bed was vibrating at a fundamental frequency of 120 Hz, with harmonics of decreasing amplitude at 240 and 360 Hz. Vibrations in all degrees of motion were found to be occurring at similar frequencies. Acoustic beamforming using a microphone array showed that the test bed was a dominant noise source at the same frequencies. Initially the entire test bed was covered by a Plexi-glass casing for safety reasons. It was found that the glass casing a ected the microphone array measurements as the noise produced by the components had no direct path to the array. Almost all the measured noise was refracted through the gaps between the glass casing and the stretcher holding it, that led to spurious microphone array results. As a result of this, the experiments were conducted without the glass casing. It was discovered after the experiments that the glass casing not only a ects the path of sound but the amplitude is also a ected. The components of the drive train namely gearbox, brake, CVP and generator, were found to be emitting sound at various discrete frequencies ranging from 165 to 3885 Hz. They were also found to be emitting broadband noise, where gearbox and generator were found to be most dominant noise sources. We were able to separate each noise source on a complex wind turbine drive train that contributed to the mechanical noise generation from a wind turbine.
M.S. in Mechanical and Aerospace Engineering, May 2012
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Title: A SPECTRAL ELEMENT SOLVER FOR SIMULATING TURBULENT FLOWS IN COMPLEX GEOMETRIES
Creator: Kandala, Sriharsha
Date: 2015, 2015-07
Description: Flows in urban street canopies are quite complex both physically and geometrically and often unique to the specific canopy. Understanding the...
Show moreFlows in urban street canopies are quite complex both physically and geometrically and often unique to the specific canopy. Understanding the physics of these flows is important for various applications like prediction and control of dispersion in urban environments and efficient navigation of Micro-Air Vehicles (MAV) in gusty velocity fields among others. These flows are turbulent and the velocity fields are characterized by a wide range of spatial and temporal scales. Traditionally, given the exorbitant number of grid points required for accurate resolution of all flow features in computer simulations, experimental measurements supplemented with theory were the only feasible choice for understanding these flows. However with rapid increase in computing power and development of highly scalable algorithms to harness this power, numerical simulations are increasingly becoming feasible for higher Reynolds number flows. In the current work, flow in a model urban street canyon is studied using high-fidelity three-dimensional computational fluid dynamics simulations. Specsolve, a parallel spectral element solver capable of running parallel simulations utilizing thousands of processors, is developed for this purpose. The simulation domain used in this study consists of a 5 by 7 array of obstacles representative of a typical urban environment with the canyon aspect ratio corresponding to the skimming flow regime. These simulations do not use any turbulence model and are stabilized using a filtering procedure. Hot-wire data obtained from the wind tunnel experiments performed on an identical domain are used to prescribe realistic inflow boundary conditions upstream of the array. Numerical simulations were performed for cases where the flow is perpendicular to the array and with the flow at 15 degree angle of incidence. A grid resolution study is conducted to zero-in on the spectral element mesh required to resolve all important flow features for the 0 degree angle of incidence case. Mean velocity, coherent-structures and turbulence characteristics are used to describe the most important flow features in the domain. Streetwise evolution of flow is studied and the results indicate that flow reaches an equilibrium state by the third street.
Ph.D. in Mechanical and Aerospace Engineering, July 2015
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Title: DEVELOPMENT OF A PREDICIlVE FRAMEWORK TO FORECAST VENOUS STENOSIS
Creator: Mahmoudzadeh Akherat, S.m. Javid
Date: 2016, 2016-12
Description: The end stage renal disease (ESRD) patient population is growing at a troubling rate, calling for a focused attention to investigate the...
Show moreThe end stage renal disease (ESRD) patient population is growing at a troubling rate, calling for a focused attention to investigate the chronic kidney diseases, their characteristics and our lines of defense against them. One major medical treatment for ESRD patients is hemodialysis which is facilitated through vascular access (VA). The vascular access of particular interest in this investigation as well as the medical community is the brachiocephalic fistula (BCF), which is a form of arteriovenous fistula (AVF), created surgically by connecting the brachial artery and the cephalic vein. It is commonly used for elderly patients and for those with poor circulation systems, e.g. diabetics. The extreme hemodynamic environment that BCF creates triggers the onset of neointimal hyperplasia (NH) in most of these patients which leads to access failure and a high morbidity and mortality rate. This process happens in a matter of months, providing an excellent translational medicine experimental stage to observe as the vessel walls react and adapt to the new hemodynamically violent conditions. Through extensive analysis of the venous deformation and subsequent hemodynamics of a patient cohort of 160, a prognosticative framework to predict the vein deformation in these patients prior to the occurrence of the failure has been developed. The obtained results are the consequence of the integration of clinical practice and computational science. The proposed method was first based on our hypothesis which roots the NH in non-physiological wall shear stresses (WSS), and was then improved and modified using rigorous optimization and numerical approaches. This finding is essential to the modification of the current VA techniques to increase the patency of the AVFs, to prevent the diminishing functionality of the access, and to increase the life expectancy of ESRD patients. Moreover, this finding will further assist us in comprehension of the human vasculature growth and remodeling (G&R) through bypassing the analysis of unknown biological phenomena, as it is achieved purely by juxtaposing well-defined mathematical, physical, and medical concepts.
Ph.D. in Mechanical and Aerospace Engineering, December 2016
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Title: ACOUSTIC BEAMFORMING USING PHASED MICROPHONE ARRAY: A NOVEL METHOD TO DETECT AIR INFILTRATION
Creator: Prakash, Manisha
Date: 2013, 2013-12
Description: The major issue of air in ltration in buildings is the soaring energy consumption. According to the US Department of Energy, in 2003 it was...
Show moreThe major issue of air in ltration in buildings is the soaring energy consumption. According to the US Department of Energy, in 2003 it was estimated that there was 48% of space conditioning energy consumption due to air in ltration. This is responsible for 9.19 quadrillion Btu (quads) of energy which costs half billion dollars annually. If, just the HVAC energy consumption due to in ltration can be taken care of; then 1.2 quads of energy can be saved i.e., around 60 million dollars per year. The present state-of-the-art technique to measure air leakage rates is the Blower Door method. In order to locate air leakage spots in buildings, Tracer Gas/ Smoke Stick technique is used. The major drawbacks of these techniques are; the blower door method requires building evacuation and becomes impractical for large spaces and the tracer gas technique uses chemicals that can be hazardous. An innovative remote air leakage technique namely, beamforming using phased array, is proposed in this thesis. It is fast, compact and economical compared to methods like blower door and tracer gas which are both time consuming and require a lot of resources. It is important to validate our approach by some preliminary experiments and to benchmark these against the \real building" experimental data. We perform tests to compare the present state-of-the-art technique i.e., the blower door test with our proposed remote detection method of using acoustic phased array to detect air in ltration. To resolve sources at low frequency and get better beamform maps, subwoofers are used. Detailed description of the technique along with details of the experimental setup and discussion of results are presented in this thesis.
M.S. in Mechanical and Aerospace Engineering, December 2013
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Title: YIELD BEHAVIOR OF SOLID FOAMS UNDER MULTIAXIAL STATES OF STRESS
Creator: Ehaab, Mohammad
Date: 2011-12-14, 2011-12
Description: Growing use of solid foams as core material in load bearing composite sandwich structures requires the development as well as validation of...
Show moreGrowing use of solid foams as core material in load bearing composite sandwich structures requires the development as well as validation of predictive yield criteria for these extremely porous and, hence, lightweight engineering materials. It has been well established that solid foams, unlike the majority of bulk materials, have a pressure dependent yield behavior. This makes the validation of various yield criteria proposed in literature a challenging task because of the need for complex biaxial and triaxial experiments, which is the main reason for both the scarcity of data and the lack of predictive power in existing models. Although there have been a limited number of studies recently in literature to generate data beyond uniaxial compression and tension experiments by introducing new loading apparatuses such as Arcan apparatus and universal biaxial testing device (UBTD), they have been limited to probe shear-compression and shear-tension states of stresses without independent control of the shear component. Therefore, the data extracted from these experiments cover only a small fraction of stress space. An example of a truly biaxial testing machine with independent load control is biaxial crushing machine (BICURMA) which, however, is restricted to only compressive loads. One must recognize that biaxial testing, even with full tension/compression control, doesn’t expand the fraction of yield surface that can be probed in any significant proportion beyond shear/compression techniques. Extremely pressure dependent mechanical behavior of solid foams requires triaxial experiments for a full description of their yield surface, hence the challenge. This work addresses this challenge by using a multiaxial testing apparatus (MATA) developed at IIT to comprehensively probe the yield surface of Divinycell H100 and H130 PVC foams through uniaxial, biaxial and triaxial experiments where loads are independently controlled in each orthogonal direction. Data reduction relies on new scalar measures of characteristic stress and strain proposed by Ayyagari and Vural (2011), and yield data is compared with their newly developed pressure dependent yield criterion. Experimental results reveal that solid foams exhibit both quadratic and linear pressure dependence. Although quadratic dependence on pressure has been previously shown in literature with a limited number of experimental yield data, extensive yield data of the current study suggests a significant linear dependence as well. The final portion of this study outlines a set of new micro-scale experiments designed to test mechanical behavior of individual ligaments that make up Duocell aluminum foam, and some preliminary results.
M.S. in Mechanical, Materials, and Aerospace Engineering, December 2011
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Title: INFEASIBILITY OF A POINTWISE TRUNCATION ERROR ESTIMATE TO DRIVE MESH ADAPTATION
Creator: Singh, Manpreet
Date: 2016, 2016-12
Description: An investigation of the Fast Approximation Scheme or FAS multigrid truncation error estimates at grid points with application to mesh...
Show moreAn investigation of the Fast Approximation Scheme or FAS multigrid truncation error estimates at grid points with application to mesh redistribution is presented. Feasibility of the error estimate as a means to adapt the mesh to a physical problem by solving the elliptic mesh equations derived from minimization of the error estimate based on the principle of equidistribution is examined by solving 1-D numerical test cases. To keep mesh movement under control, a parabolized version of the mesh equation is also tested to make an active comparison of the possible improvements in adaptivity and mesh quality. The results reveal smoothness issues indicating the need for a more robust estimator within the adaptive redistribution framework. Particularly, the prevalence of poor zonal e↵ects on the mesh points alone, point to lack of information over each cell thereby rendering the estimate ine↵ective to adapt the mesh.
M.S. in Mechanical Engineering, December 2016
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Title: Mathematica Tutorial
Date: 2011, 2011
Description: A tutorial to help you learn the Mathematica tools that are particularly useful in engineering. Note that some of the graphics output has been...
Show moreA tutorial to help you learn the Mathematica tools that are particularly useful in engineering. Note that some of the graphics output has been removed from the download version to reduce the size of the notebook. Evaluate the notebook to regenerate these and complete the notebook.
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Title: Influence of Injector Location on Part-Load Performance Characteristics of Natural Gas Direct-Injection in a Spark Ignition Engine
Creator: Hall, Carrie, Sevik, James, Pamminger, Michael, Wallner, Thomas, Scarcelli, Riccardo, Boyer, Brad, Wooldridge, Steven, Miers, Scott
Date: 2016
Publisher: SAE International

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