Numerical Simulation of the Supersonic Base Flows with Emphasis on Turbulence Model

Chang-Fei Zhuo; Yan-Bing Zou; Peng Xu

doi:10.6180/jase.201806_21(2).0008

Numerical Simulation of the Supersonic Base Flows with Emphasis on Turbulence Model

Chang-Fei Zhuo This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Yan-Bing Zou^1,2 and Peng Xu³

¹School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P.R. China
²Wuhan Guide Infrared Co., Ltd, Wuhan 430040, P.R. China
³The Technical Center of Jinxi Industries Group Co., Ltd, Taiyuan 030027, P.R. China

Received: March 29, 2017
Accepted: February 6, 2018
Publication Date: June 1, 2018

Download Citation: ||https://doi.org/10.6180/jase.201806_21(2).0008

ABSTRACT

Numerical investigations of the supersonic flow over a base of cylinder using Reynolds averaged Navier-Stokes (RANS) method have been performed in detail in this paper. The flow is along a cylinder axis and separates suddenly at a blunt base corner. The performance of several turbulence models have been examined in this study. They include: Spalart-Allmaras(S-A), k-, k- BSL, and k- SST. Some important statistics computed for engineering in the wake region of the flow are compared with the experimental results for the same conditions and configurations. For k- SST turbulence model, the performance of three compressibility models are examined. In addition, the performance of numerical scheme for spatial discretization is examined for the supersonic base flow. In general, k- SST and k- BSL turbulence model perform better in the near wake than S-A and k- model, and predict the base pressure and axial length of the recirculation bubble much better. Three compressibility models for k- SST turbulence model perform much more different, and over-predict or under-predict the base pressure. From the numerical scheme point of view, AUSMPW+ scheme is more suitable for the numerical calculation of the base flow field about the supersonic flows.

Keywords: Computational Fluid Dynamics, Turbulence Model, Base Flow, Compressible Modification, Numerical Scheme

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