Title: Turbulence Model Effects on RANS Simulations of the Direct-Connected Scramjet Combustor Test
Abstract: A scramjet engine has been expected to use for the reusable-spaceplane because of the higher energy efficiency than conventional rocket propulsion systems. The method that makes more effective acceleration to scramjet engine is using ramjet mode operation at low Mach number fight condition. The study is conducted to investigate the effects of turbulence modeling on the simulation of the scramjet combustor flow-field and the prediction of the combustor performance in the scramjet mode and ramjet mode operation, respectively. Three-dimensional RANS simulations were performed to simulate the scramjet combustion test by direct-connect wind tunnel by using CRUNCH CFD. As the result, the RNG k-ε model (RNG) with Explicit Algebraic Stress Model (EASM) was worked well at the ramjet mode. However, turbulence models without EASM were more effective for the scramjet mode analysis. the decrease of the turbulent Schmidt number (Sct) promoted the fuel/air mixing and combustion, but the effect to the wall pressure and thrust were limited.
Publication Year: 2020
Publication Date: 2020-08-17
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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