Title page for ETD etd-07082010-020332

Type of Document Dissertation
Author Atta, Essam H.
URN etd-07082010-020332
Title Nonlinear steady and unsteady aerodynamics of wings and wing-body-combinations.
Degree PhD
Department Engineering Science and Mechanics
Advisory Committee
Advisor Name Title
Nayfeh, Ali H. Committee Chair
Kandil, Osama A. Committee Co-Chair
Hansgen, Kenneth B. Committee Member
Kaiser, John E. Jr. Committee Member
Mook, Dean T. Committee Member
  • Airplanes
Date of Defense 1978-05-06
Availability restricted

A modified vortex lattice method is developed to solve for the nonlinear three-dimensional unsteady incompressibl~ flow over delta wings. Symmetric motions (pitching, heaving) and asymmetric motions (roll, yaw) are considered. Then the method is generalized to treat the nonlinear three-dimensional steady flow for bodies and wing body combinations. Numerical examples include variety of shapes and comparison with existing experimental data and other numerical methods over a wide range of angle of attack shows good agreement. For bodies alone the results deteriate downstream of the separation region, while for wing-body combinations the agreement with the experimental data is good as long as the body separation effect is not large. The developed computer codes should provide a useful tool in the design of aircraft and missiles.

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