Gas-dynamic problems in off-design operation of supersonic inlets (review)
V.I. Zvegintsev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: zvegin@itam.nsc.ru
Keywords: supersonic flow, inlet, air-breathing engine, flow deceleration, shock waves, start/unstart, backpressure
Pages: 807–834
Abstract
Modern concepts of
operation of supersonic inlets of high-velocity air-breathing engines are
analyzed. It is demonstrated that the flow in the engine duct becomes extremely
complicated in off-design modes of inlet operation, which can lead to
unpredictable consequences, in particular, to inlet unstart. The term “inlet
unstart” is considered in the present paper as a synonym of the absence of
theoretical understanding and prediction of gas-dynamic phenomena. Various
approaches are proposed to ensure self-regulation of the inlet-combustor system
for air-breathing engines. Possible directions of further research are
indicated for the purpose of stable operation of inlets in a wide range of
flight conditions.
DOI: 10.1134/S0869864317060014
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