粗糙元诱导的高超声速边界层转捩

doi:10.7527/S1000-6893.2016.0130

非定常流动数值模拟研究

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粗糙元诱导的高超声速边界层转捩

段志伟, 肖志祥

清华大学航天航空学院, 北京 100084

收稿日期:2016-01-18 修回日期:2016-04-26 出版日期:2016-08-15 发布日期:2016-04-29
通讯作者: 肖志祥,Tel.:010-62797060。E-mail:xiaotigerzhx@tsinghua.edu.cn E-mail:xiaotigerzhx@tsinghua.edu.cn
作者简介:段志伟,男,博士,助理研究员。主要研究方向:空气动力学、高精度湍流预测和边界层转捩。Tel.:010-62795411。E-mail:dzw15@tsinghua.edu.cn;肖志祥,男,博士,副研究员,博士生导师。主要研究方向:RANS-LES混合方法、高精度湍流预测、流动转捩和计算气动声学。Tel.:010-62797060。E-mail:xiaotigerzhx@tsinghua.edu.cn
基金资助:
国家自然科学基金（11372159）；中国博士后科学基金（2015M571029）；国家重点研发计划项目（2016YFA0401200）

Roughness element induced hypersonic boundary layer transition

DUAN Zhiwei, XIAO Zhixiang

School of Aerospace Engineering, Tsinghua University, Beijing 100084, China

Received:2016-01-18 Revised:2016-04-26 Online:2016-08-15 Published:2016-04-29
Supported by:
National Natural Science Foundation of China (11372159);China Postdoctoral Science Foundation (2015M571029);National Key Research and Development Project (2016YFA0401200)

摘要/Abstract

摘要：

基于有限体积方法，直接数值模拟了高超声速边界层内不同形状粗糙元导致的强制转捩现象；为了能够深入探究强制转捩机理，解析小尺度运动，同时又能够较好地捕捉激波，采用高阶色散最小耗散可调（MDCD）格式对Navier-Stokes方程组对流项进行重构。计算结果表明，数值结果与对应的实验值吻合较好；该方法能解析小尺度的流动结构以及规则结构的破碎与失稳过程，可揭示粗糙元引起的强制转捩机理，即此类强制转捩主要由粗糙元顶部的三维剪切层失稳导致。对多种粗糙元的转捩效果进行了定量研究，影响因素包括粗糙元形状、几何参数等。

关键词: 高超声速, 粗糙元, 边界层转捩, 参数化影响, 直接数值模拟

Abstract:

Hypersonic boundary layer transition from laminar to turbulent induced by different isolated roughness elements is investigated using direct numerical simulation based on finite volume formulation. To explore the transition mechanism through resolving the small flow structure, and capture shock wave in hypersonic flow, the high order minimized dispersion and controllable dissipation (MDCD) scheme is used to reconstruct the convection terms of Navier-Stokes equations. The numerical results agree well with experimental data. The numerical method adopted in this article is able to resolve small flow structures and their break-up and instability procedure. And it shows that the transition is dominated by the instability of the three-dimensional shear layer on top of the roughness elements. The effect of roughness element shape and geometrical parameters on transition mechanisms, and the transition results of multiple roughness elements are quantitatively studied.

Key words: hypersonic, roughness element, boundary layer transition, parameter effects, direct numerical simulation

中图分类号:

V211.3

段志伟, 肖志祥. 粗糙元诱导的高超声速边界层转捩[J]. 航空学报, 2016, 37(8): 2454-2463.

DUAN Zhiwei, XIAO Zhixiang. Roughness element induced hypersonic boundary layer transition[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(8): 2454-2463.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

粗糙元诱导的高超声速边界层转捩

Roughness element induced hypersonic boundary layer transition

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