creator Weirich, Jeremy Michael advisor Williams, David R. Longitudinally gusting ow over a nominally two dimensional airfoil is exam- ined over a range of incidence angles and reduced frequencies. The response of the airfoil to these gusting ows is compared with classical theory, and is found to follow theory moderately well at low incidence angles across all reduced frequencies. At high incidence angles, the predictive power of the classical model is found to decrease signi cantly. The aerodynamic forces are also decomposed into circulatory and non- circulatory e ects and their relative strength is examined. The circulatory e ects are found to be minimal and constant at low incidence angles, while high incidence angles show strong variation, indication that the wake structure experiences signi - cant changes. The noncirculatory e ects are found to depend linearly on the reduced frequency and a ect the ow more strongly at lower incidence angles. An argument is made for the utility of dividing analysis of the ow into attached ow, separating ow, and fully detached ow regimes. The division is clear when examining how the normalized force coe cients change with reduced frequency, and provides a useful tool for predicting the transition of the ow between regimes. Submitted by Liana Khananashvili (khananashvili@iit.edu) on 2014-05-12T20:26:12Z No. of bitstreams: 2 jthesis_final.pdf: 3068443 bytes, checksum: 3bd804199c455562811d8985517a6c80 (MD5) Signed Title Page.pdf: 776740 bytes, checksum: 28d91ab4efd579910d793a8aad341f23 (MD5) Made available in DSpace on 2014-05-12T20:26:12Z (GMT). No. of bitstreams: 2 jthesis_final.pdf: 3068443 bytes, checksum: 3bd804199c455562811d8985517a6c80 (MD5) Signed Title Page.pdf: 776740 bytes, checksum: 28d91ab4efd579910d793a8aad341f23 (MD5) Previous issue date: 2013-12 M.S. in Aerospace Engineering, December 2013 2013 2013-12 http://hdl.handle.net/10560/3232 en Thesis born digital application/pdf In Copyright http://rightsstatements.org/page/InC/1.0/ Restricted Access MMAE / Mechanical, Materials, and Aerospace Engineering Illinois Institute of Technology Affiliated department