基于涡旋强度亚格子应力模型的湍流有旋流动大涡模拟

doi:10.3969/j.issn.0253-2778.2018.03.008

中国科学技术大学学报 ›› 2018, Vol. 48 ›› Issue (3): 236-245.DOI: 10.3969/j.issn.0253-2778.2018.03.008

基于涡旋强度亚格子应力模型的湍流有旋流动大涡模拟

夏朝阳，张宏达，于洲，叶桃红，唐鹏

1.中国科学技术大学热科学与能源工程系，安徽合肥 230027；
2.中国航空发动机集团有限公司沈阳发动机研究所，辽宁沈阳 110015；3.池州学院机电工程学院，安徽池州 247100

收稿日期:2017-03-18 修回日期:2017-06-02 出版日期:2018-03-31 发布日期:2018-03-31
通讯作者: 叶桃红
作者简介:夏朝阳，男，1992年生，硕士生.研究方向：湍流的数值模拟.E-mail：xyz124@mail.ustc.edu.cn
基金资助:
国家自然科学基金（91441117）,池州学院自然重点研究项目(2016ZRZ007)资助.

Large eddy simulation of turbulent swirling flow based on the swirling-strength subgrid scale stress model

XIA Zhaoyang, ZHANG Hongda, YU Zhou, YE Taohong, TANG Peng

1. Department of Thermal Science and Engineering,University of Science and Technology of China,Hefei 230027,China;
2. Shenyang Engine Research Institute, Aero Engine (Group) Corporation of China, Shenyang 110015, China;
3. School of Mechatronics Engineering, Chizhou University, Chizhou 247000, China）

Received:2017-03-18 Revised:2017-06-02 Online:2018-03-31 Published:2018-03-31

摘要/Abstract

摘要： 为了改进大涡模拟方法预测湍流有旋流动的能力，将一种基于涡旋强度构建的亚格子涡粘模型应用于悉尼旋流燃烧器的冷态场大涡模拟中.选取高雷诺数低旋流数和低雷诺数高旋流数两种工况，验证该模型在强剪切且有旋流场大涡模拟中的表现，并与动态Smagorinsky（DSM）模型模拟结果以及实验结果进行比较.模拟结果表明,基于涡旋强度模型（SSM）的大涡模拟结果能够合理预测钝体回流区、二次回流区以及中心射流进动等重要特征，同时速度统计矩结果总体好于DSM模型结果.但在旋流剪切层处二阶矩预测较高，说明SSM模型在剪切层处可能耗散较大，需要改进.

关键词: 大涡模拟, 涡粘模型, 悉尼旋流燃烧器, 涡旋强度

Abstract: To enhance the ability of large eddy simulation (LES) to predict turbulent swirling flow, a subgrid eddy viscosity model based on the swirling-strength was applied to the LES of the non-reactive flow of the Sydney swirl burner. Two operation conditions， high Reynolds number with low swirl number and low Reynolds number with high swirl number, were selected to validate the performance of the proposed model in the strong shear layer and swirling flow, and the model simulation results were compared with the dynamic Smagorinsky model (DSM) and experimental results. The simulation results show that the LES results based on the swirling-strength model (SSM) can reasonably predict the important characteristics of the recirculation zone and precession motion of the central jet, which indicates the SSM model results of statistical moment are better than the DSM model results. However, the prediction of the RMS values at the shear layer of swirling flow is higher than experimental data, which indicates that the kinetic energy dissipation of SSM model may be over predicted in the shear layer, and that the SSM model needs to be improved in future.

Key words: large eddy simulation, Sydney swirl burner, eddy viscosity model, swirling strength model

中图分类号:

TP391

夏朝阳，张宏达，于洲，叶桃红，唐鹏. 基于涡旋强度亚格子应力模型的湍流有旋流动大涡模拟[J]. 中国科学技术大学学报, 2018, 48(3): 236-245.

XIA Zhaoyang, ZHANG Hongda, YU Zhou, YE Taohong, TANG Peng. Large eddy simulation of turbulent swirling flow based on the swirling-strength subgrid scale stress model[J]. Journal of University of Science and Technology of China, 2018, 48(3): 236-245.

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基于涡旋强度亚格子应力模型的湍流有旋流动大涡模拟

Large eddy simulation of turbulent swirling flow based on the swirling-strength subgrid scale stress model

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