Numerical modeling of the conditions for realization of flow regimes in supersonic axisymmetric conical inlets of internal compression

An investigation of starting processes and flow patterns occurring in hypersonic axisymmetric inlets of internal compression

“…There were computed values of the throat cross-sectional area ( th ) st providing the inlet start and values of the throat cross-sectional area ( th ) cr critical from the standpoint of the occurrence of the supersonic flow in the already started inlet. Some computational data concerning with the inlets in the form of conical funnels and obtained for = 2-8 are presented in [6]. It there was revealed that the starting throat cross-sectional area ( th ) st for these simplest inlets computed with taking into account the non-one-dimensionality of flow in them adequately agrees with the Kantrowitz Donaldson criterion.…”

“…Thus, the discussed computations have shown the starting flow regime of the considered inlet corresponds to values Re > 22 10 6 , whereas this flow regime experimentally occurred in a range Re = (5.5-1.5)·10 6 . The distinction can be explained by the temperature factor -walls of models tested in the IT-301 wind tunnel were cold as compared to the total temperature of the operating flow.…”

“…The region between curve 1 and curve 2 corresponds to parameters of inlets and flows in front of them at which the inlets have not to start in the conventional sense. Numerical data on determination of ( th ) cr for the inlets with c = 15 , which were obtained in = 2 8, are presented by an approximation obtained in [6], curve 3 in Fig. 4.…”

“…inlet model length is about Re = 3.8·10 6 . The increase in the flow velocity from the nozzle exit to the inlet entrance agrees with the known it's increase in the airstreams exhausting from the conical nozzles of the hot-shot wind tunnel IT-301 [1].The flow pattern in the model inlet for the time moment = 1002 s is presented in Fig.…”

Numerical study of thermochemical effects on the flowfield structure near the triple point at irregular reflection of shock waves

“…Shock wave reflection and interaction are interesting from both fundamental [1,2] and applied [3,4] points of view. Traditionally the parameters around the point of shock intersection were predicted with the gas being considered as an inviscid fluid, for example, by using t three-shock theory [5].…”