ED97-43968-1
This computational fluid dynamics (CFD) image shows the Hyper-X vehicle at a Mach 7 test condition with the engine operating. The solution included internal (scramjet engine) and external flow fields, including the interaction between the engine exhaust and vehicle aerodynamics. The image illustrated surface heat transfer on the vehicle surface (red is highest heating) and flowfield contours at local Mach number. The last contour illustrated the engine exhaust plume shape. This solution approach was one method of predicting the vehicle performance, and the best method for determination of vehicle structural, pressure, and thermal design loads.
The Hyper-X program was an ambitious series of experimental flights to expand the boundaries of high-speed aeronautics and develop new technologies for space access. When the first of three aircraft flew, it was the first time a non-rocket engine has powered a vehicle in flight at hypersonic speeds-speeds above Mach 5, equivalent to about one mile per second or approximately 3,600 miles per hour at sea level.1997NASA Photo› X-43A Project Description