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Self-starting Simulation of a Hypersonic Inlet with Variable Free Stream Condition
Author(s): Jie WU, An-yuan Yu, Yuan-yuan He, Jia-ling Le
Keywords: Hypersonic inlet; Self-starting; Variable free stream condition; Unsteady
The flow structure transition of a hypersonic inlet from unstart to start during accelerating trajectory is studied by numerical simulation. The results of pressure distribution along the inlet wall, mass flow rate, total pressure recovery coefficient and aerodynamic forces simulated by the quasi-steady and unsteady two dimensional and three-dimensional quasi-steady methods are compared. Analysis indicates that the two-dimensional quasi-steady and unsteady simulations can get the consistent inlet self-starting Mach number, and unsteady simulation can capture the periodical change of aerodynamic forces while this phenomena is not found in quasi-steady simulation