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Thermophysics and Aeromechanics

2022 year, number 4

Numerical simulation of the starting of a supersonic air intake with a rectangular duct and draining part of the captured air flow through longitudinal slots

I.I. Mazhul, Yu.P. Gounko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: numerical simulation, supersonic flow, longitudinal slots, air bypass, air-intake start

Abstract

The paper presents the results of numerical simulation of starting conditions for a supersonic air intake using the bypass of part of the captured air flow through longitudinal slots. The air-intake duct consists of a tapered inlet section and a constant-cross-section throat built using flat surfaces, and it contains longitudinal bypass slots stretching along the flat bottom surface. Various types of the sectional bypass of the air flow are investigated, and the change of the air-intake-duct flow structure depending on the flow bypass mode is demonstrated. Numerical modeling of the three-dimensional flow was performed for free-stream Mach number M = 4 on the basis of Reynolds-averaged Navier-Stokes equations and the κ-ω SST model of turbulence.