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Numerical Simulation of Flow Fields in a Ramjet Isolator with a Divergent Angle

Author: TangBin
Tutor: ZhengYaoï¼›ZouJianFeng
School: Zhejiang University
Course: Aerospace Propulsion Theory and Engineering
Keywords: Ramjet Isolator Divergent angle Numerical simulation Shock wave/turbulent boundary-layer interaction
CLC: V235.21
Type: Master's thesis
Year: 2011
Downloads: 6
Quote: 0
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Abstract


A preliminarily systematic steady and unsteady numerical simulation of shock wave/turbulent boundary-layer interaction phenomenon in a ramjet isolator with a diffuser configuration has been conducted, based on the experimental model adopted by Carroll BF and Dutton JC. The turbulence model suited for simulation of the present problem is selected (S-A turbulence model) by comparison computation, and the influences of back-pressure, Mach number, and turbulent boundary-layer thickness on the structure of shock-train in the isolator are analyzed systematically.The computational results demonstrate that the change of back pressure has no influence on the structure of shock-train and the upstream flow field, but affects its location; Mach number has obvious effect on the structure of shock-train, especially on the symmetry and length of shock-train, spacing and number of shock waves; turbulent boundary-layer thickness has some influence on the location of shock-train and pressure rise ratio through it, but not on its length.

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CLC: > Aviation, aerospace > Aviation > Aero-engine ( propulsion system ) > Air jet engine > Compressor engine > Ramjet engine
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