On the question of starting conditions for frontal axisymmetric inlets tested in hot-shot wind tunnels
Yu.P. Gounko1 and I.I. Mazhul1,2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
E-mail: gounko@itam.nsc.ru, mazhul@itam.nsc.ru
Keywords: numerical simulation, supersonic axisymmetric flow, hot-shot wind tunnels, frontal axisymmetric inlets of internal compression, critical conditions of the realization of flow regimes
Pages: 369–381
Abstract
The work presents the
results of an analysis of starting conditions for some frontal axisymmetric
inlets of internal compression tested at
freestream Mach numbers М = 3-8.4 in the hot-shot wind tunnels based at Khristianovich Institute of Theoretical and Applied Mechanics (ITAM). The results of these inlets test are
compared with the data of numerical computations of inviscid, laminar,
and turbulent flows carried out by the pseudo-unsteady method. There were
determined the inlet throat areas limiting either with regard to the inlet
starting or with regard to providing the maximally possible degree of
geometric compression of the inlet-captured supersonic airstream at its
deceleration in the already started inlet. Reshaping of computed flow
patterns in the inlets depending on the variation of the mini-mal cross section
of the inlet internal duct is analyzed.
DOI: 10.1134/S0869864317030064
|
