The Unsteady Flow Physics of Hypersonic Inlet Starting Processes

Transient Analysis for Hypersonic Inlet Accelerative Restarting Process

“…It has been found that the Reynolds number and the geometry parameters especially the internal contraction ratio can affect the restarts of supersonic inlets to a great extend [1]. Therefore, using variable geometries is a viable method for most ramjet/scramjet inlets [8][9][10][11][12][13][14], however, the weight and complexity can significantly degrade the total performance of scramjet engines and there still exist many challenges [15].…”

“…In recent years, the latter unsteady starting methods have been explored with Reynolds Averaged Navier-Stokes simulations [8][9][10][11][12]. However, for the accelerative restarting method, although two-dimensional inviscid simulations have been carried out to verify the efficacy of accelerative unsteadiness on the starting issues of a radius Busemann inlet [18,19], viscous simulation about the accelerative restarting process of two-dimensional planar inlet is still scarce, and the effects of acceleration-induced unsteadiness on the hypersonic inlet restarting process still remain unclear.…”