流场可压缩性对涡相互作用影响的数值研究

doi:10.7527/S1000-6893.2019.23295

流体力学与飞行力学

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流场可压缩性对涡相互作用影响的数值研究

郑忠华¹, 范周琴¹, 王子昂², 余彬², 张斌²

1. 中国空气动力研究与发展中心超高速空气动力研究所高超声速冲压发动机技术重点实验室, 绵阳 621000;
2. 上海交通大学航空航天学院, 上海 200240

收稿日期:2019-07-19 修回日期:2019-08-13 出版日期:2020-02-15 发布日期:2019-08-29
通讯作者: 张斌 E-mail:zhangbin1983@sjtu.edu.cn
基金资助:
国家自然科学基金（51676203）

Numerical study of compressibility effect on flowfield evolution of vortex interaction

ZHENG Zhonghua¹, FAN Zhouqin¹, WANG Ziang², YU Bin², ZHANG Bin²

1. Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2019-07-19 Revised:2019-08-13 Online:2020-02-15 Published:2019-08-29
Supported by:
National Natural Science Foundation of China (51676203)

摘要/Abstract

摘要： 涡相互作用作为冲压发动机喷注装置的典型抽象流动现象，研究其可压缩性影响对于认识包含化学反应的真实燃料喷射场具有一定基础理论价值。基于经过数值验证的可压缩Navier-Stokes算法与压力泊松方程初始条件设置方法研究流场可压缩性对涡相互作用演化过程的影响。结果表明，以较高涡旋马赫数表征的可压缩性在改变涡对形态的同时，具有延缓涡旋相互靠近，迟滞融合进程的作用。关于涡对系统开始融合的临界条件，可压缩相互作用开始的临界展弦比与无量纲时间相比于低速涡对明显提高。为在无量纲时间意义下统一不同马赫数涡对相互作用的进程，从涡心密度随时间变化规律出发在不可压涡对特征时间的基础上，初步构建了考虑可压缩性的时间尺度修正关系。

关键词: 冲压发动机, 塔式喷注器, 可压缩性, 涡相互作用, 时间尺度修正

Abstract: As a typical flow model of ramjet device, the study on the influence of compressibility in vortex interaction has fundamental value for understanding the actual fuel injection with chemical reactions. Based on the validated compressible Navier-Stokes solver and initial condition setup (pressure Poisson equation), the influence of compressibility on the evolution process of vortex interaction is investigated in this paper. The results show that the compressibility characterized by higher vortex Mach number changes the vortex pair morphology and delays the closing of the vortex rings, slowing down the merging process. With regard to the critical condition of vortex merging, the critical aspect ratio and the dimensionless time when the interaction begins are significantly higher than those in low velocity vortex pairs. In order to unify the interaction processes among the vortex pairs of different Mach number in the sense of dimensionless time, a compressible timescale correction relationship is constructed based on the temporal evolution of local density in vortex centre.

Key words: ramjet, pylon injection, compressibility, vortex interaction, timescale correction

中图分类号:

V235.21

郑忠华, 范周琴, 王子昂, 余彬, 张斌. 流场可压缩性对涡相互作用影响的数值研究[J]. 航空学报, 2020, 41(2): 123295-123295.

ZHENG Zhonghua, FAN Zhouqin, WANG Ziang, YU Bin, ZHANG Bin. Numerical study of compressibility effect on flowfield evolution of vortex interaction[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 123295-123295.

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E-mail：hkxb@buaa.edu.cn

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流场可压缩性对涡相互作用影响的数值研究

Numerical study of compressibility effect on flowfield evolution of vortex interaction

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