Investigation of the Longitudinal Stability of the T-45A withComputational Fluid Dynamics

Paper #:
  • 921925

Published:
  • 1992-10-01
Citation:
Blackburn, K., Agrawal, S., and Jasper, D., "Investigation of the Longitudinal Stability of the T-45A withComputational Fluid Dynamics," SAE Technical Paper 921925, 1992, https://doi.org/10.4271/921925.
Pages:
12
Abstract:
Wind tunnel and flight tests of the T-45A aircraft have identified a transonic region of reduced longitudinal stability. Wind tunnel results established the phenomenon as a flow interaction between the wing-body and the horizontal tail; however, insufficient data existed to determine the mechanism causing the reduced stability. Computational Fluid Dynamics (CFD) analysis of the T-45A in the transonic region identified the source of the reduced stability to be an increase in downwash on the horizontal tail caused by mid-span vorticity shed from the wing.
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