Results of a numerical simulation of the unsteady axisymmetric flow forming in joint process of starting an impulse wind tunnel equipped with a plenum chamber and a throttling device as well as starting an axisymmetric inlet tested in this tunnel are reported. An impulse wind tunnel schematizing the hot-shot wind tunnel IT-302M based at ITAM and an operating flow regime of Mach number M = 8 obtained with a contoured nozzle were under consideration. There was applied a Reynolds-averaged Navier–Stokes code including the k-ω SST turbulence model. The starting process was initiated in accordance with the Riemann problem. The computed data showed a complicated starting shock-wave system forming in the nozzle and in front of the tested inlet, it included the primary shock wave, contact discontinuity transforming into a contact layer, inverse shock wave, expansion wave. This system determined the lasting of the processes of starting the nozzle and the inlet proper. As it was identified, a chain of changing inlet flow modes occurred in the starting process which began from the starting inlet mode when the flow in the inlet duct is supersonic and culminated in the eventual unstarting inlet mode with a bow shock in front of the inlet and with the subsonic flow in its duct.
Numerical simulation of the shock-wave starting of an inlet tested in an impulse wind tunnel with a throttled plenum chamber
INTERNATIONAL CONFERENCE ON THE METHODS OF AEROPHYSICAL RESEARCH (ICMAR 2020) ; 2020 ; Novosibirsk, Russia
AIP Conference Proceedings ; 2351 , 1
24.05.2021
6 pages
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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