基于动网格技术的正弦压力研究

张忠立; 徐子翼; 倪玉山; 王灿; 张进明

doi:10.3969/j.issn.1000-1158.2020.01.13

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计量学报 ›› 2020, Vol. 41 ›› Issue (1) : 67-72. DOI: 10.3969/j.issn.1000-1158.2020.01.13

力学计量

基于动网格技术的正弦压力研究

张忠立^1,2,徐子翼¹,倪玉山¹,王灿²,张进明²

作者信息 +

Sinusoidal Pressure Research Based on Dynamic Mesh Technique

ZHANG Zhong-li^1,2,XU Zi-yi¹,NI Yu-shan¹,WANG Can²,ZHANG Jin-ming²

Author information +

文章历史 +

摘要

正弦压力是一种典型的周期性动态压力标准信号,而正弦压力发生器正是产生正弦压力信号的关键。以转盘式正弦压力发生器为例,采用动网格技术、Reynolds-averaged Navier-Stokes方程和Spalart Allmaras湍流模型,对不同的压力发生腔尺寸和工作频率进行三维瞬态流场的数值仿真。结果表明:工作频率不变时,正弦压力动静幅值比和谐波失真度随腔体宽度增大而减小,压力均值随腔体宽度增大而增大;腔体宽度不变时,正弦压力动静幅值比随工作频率增大而减小,压力均值随工作频率增大而增大,谐波失真度呈现先减小后增大的规律;通过动网格数值仿真技术,能有效实现正弦压力研究中各种模型结构的效果预测。

Abstract

Sinusoidal pressure is a typical standard signal of periodic dynamic pressure, while the sinusoidal pressure generator is the key to generate sinusoidal pressure signal. A rotating disk type of sinusoidal pressure generator has been carried out for example, to numerically simulate three-dimensional transient flow field through the dynamic mesh technique, the Reynolds-averaged Navier-Stokes equation and the Spalart Allmaras turbulence model, in order to investigate the effect of different cavity size and working frequency. The results show that, firstly in case the working frequency is constant, the dynamic amplitude ratio and the harmonic distortion degree decrease with the increase of cavity width, while the mean pressure increases. Secondly in case the cavity width is constant, as the working frequency increases, the dynamic amplitude ratio decreases, the mean stress increases, meanwhile the harmonic distortion degree decreases at first and then increases. The simulation based on dynamic mesh technique can effectively predict the various structures effects in sinusoidal pressure study.

导出引用

张忠立,徐子翼,倪玉山,王灿,张进明. 基于动网格技术的正弦压力研究[J]. 计量学报. 2020, 41(1): 67-72 https://doi.org/10.3969/j.issn.1000-1158.2020.01.13

ZHANG Zhong-li,XU Zi-yi,NI Yu-shan,WANG Can,ZHANG Jin-ming. Sinusoidal Pressure Research Based on Dynamic Mesh Technique[J]. Acta Metrologica Sinica. 2020, 41(1): 67-72 https://doi.org/10.3969/j.issn.1000-1158.2020.01.13

中图分类号： TB935

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