dc.contributor.author | Torgler, Bradley | |
dc.date.accessioned | 2021-10-08T19:31:45Z | |
dc.date.available | 2021-10-08T19:31:45Z | |
dc.date.issued | 2007-05-31 | |
dc.identifier.uri | http://hdl.handle.net/1808/32123 | |
dc.description | Thesis (M.S.)--University of Kansas, Aerospace Engineering, 2007. | en_US |
dc.description.abstract | Aerodynamic damping is investigated in the subsonic, transonic and supersonic flight regimes for the Apollo and Expert orbital re-entry vehicles. Static moment and forced oscillation experiments are carried out on replica models in the von Karman Institute (VKI) S-1 Transonic-Supersonic wind tunnel. This is the first investigation to be done using the forced oscillation experimental technique in the VKI-S1. Oscillations are induced to match the reduced frequencies of flight vehicles based on their natural frequencies. A variety of mathematical models are developed to extract the aerodynamic damping-in-pitch parameter from the forced oscillation data. The results are compared to one another as well as to published data (where applicable). Free-to-tumble experimental data obtained for an Apollo model prior to this investigation is also evaluated using various mathematical models. Results show that classical analysis methods for extracting the aerodynamic damping-in-pitch parameter, which have been used many times prior to this investigation, continue to yield the most accurate measure for aerodynamic damping extraction. These include an outer-extremity envelope distribution method, which assumes a constant damping from one peak of pitch attitude to the next for free-to-tumble analysis and an energy conservation method based on hysteresis loops of pitching moment against pitch attitude for forced oscillation analysis. | en_US |
dc.publisher | University of Kansas | en_US |
dc.rights | This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author. | en_US |
dc.subject | Applied sciences | en_US |
dc.subject | Damping-in-pitch | en_US |
dc.subject | Forced oscillation | en_US |
dc.subject | Free-to-tumble | en_US |
dc.subject | Moment hysteresis | en_US |
dc.subject | Reduced frequency | en_US |
dc.subject | Stability | en_US |
dc.title | Experimental and analytical techniques for extracting the aerodynamic damping-in-pitch parameter for orbital re-entry vehicles: An investigation of stability for space capsules | en_US |
dc.type | Thesis | en_US |
dc.thesis.degreeDiscipline | Aerospace Engineering | |
dc.thesis.degreeLevel | M.S. | |
kusw.bibid | 6599284 | |
dc.rights.accessrights | openAccess | en_US |