An Euler analysis of a High-Speed Civil Transport (HSCT) concept at Mach 3A marching Euler solver, GEM3D, was used to predict the Mach 3 flow field for the wing and body of a High-Speed Civil Transport concept. The analysis focused on a typical cruise lift coefficient of 0.1 at alpha = 3 deg. The Euler solution indicated that embedded shocks formed on the upper surface of the inboard wing panel and at the leading-edge of the outboard wing panel, due to its supersonic leading edge condition. According to a simple static-pressure criterion, the embedded wing upper-surface shocks were sufficiently strong to separate a turbulent boundary layer. Comparison of aerodynamic coefficients from the Euler solver with those from linear theory shows that the linear theory estimates of lift and drag are optimistic, which would lead to optimistic estimates of cruise range.
Document ID
19890062309
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pittman, James L. (NASA Langley Research Center Hampton, VA, United States)
Bonhaus, Daryl L. (NASA Langley Research Center Hampton, VA, United States)
Dollyhigh, Samuel M. (NASA Langley Research Center Hampton, VA, United States)
Siclari, Michael J. (Grumman Aerospace Corp. Bethpage, NY, United States)