亚声速风洞可压缩流体扰动模态分析

doi:10.7527/S1000-6893.2020.24424

流体力学与飞行力学

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亚声速风洞可压缩流体扰动模态分析

杜钰锋¹, 林俊¹, 王勋年², 熊能¹

1. 中国空气动力研究与发展中心高速空气动力研究所, 绵阳 621000;
2. 中国空气动力研究与发展中心空气动力学国家重点实验室, 绵阳 621000

收稿日期:2020-06-17 修回日期:2020-09-27 出版日期:2021-06-15 发布日期:1900-01-01
通讯作者: 杜钰锋 E-mail:1415776643@qq.com

Analysis of modes of disturbances in compressible fluid in subsonic wind tunnel

DU Yufeng¹, LIN Jun¹, WANG Xunnian², XIONG Neng¹

1. High Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China

Received:2020-06-17 Revised:2020-09-27 Online:2021-06-15 Published:1900-01-01

摘要/Abstract

摘要： 开展了亚声速风洞中可压缩流体流场品质测量技术研究，以满足高精度风洞试验的需求。在一维等熵流动的前提下，对风洞自由来流所包含的扰动模态进行了分析，对扰动模态求解方法及流场基本物理量声、涡模态分量求解方法进行了理论推导，建立了其与质量流量脉动、总温脉动及二者相关量之间的理论关系。应用热线风速仪在马赫数0.3~0.7范围进行了流场品质测量试验，根据所建立的理论关系对扰动模态及流场基本物理量声、涡模态分量进行了求解，对结果量值随马赫数的变化规律进行了分析。利用蒙特卡洛模拟方法及不确定度传递公式对结果的不确定度进行了求解，不确定度占对应变量的最高占比为1%左右，多数结果仅为0.1%量级，表明流场品质测量试验结果具有较高精度。试验结果证明了所建立的方法应用于亚声速风洞可压缩流体扰动模态分析的可行性。

关键词: 亚声速风洞, 等熵流动, 流场品质, 扰动模态, 蒙特卡洛模拟, 不确定度

Abstract: To satisfy the need for high-precision wind tunnel testing, research on flow quality measurement technique of compressible fluid in a subsonic wind tunnel is carried out. On the premise of one-dimensional is entropic flow, the modes of disturbance included in the freestream of the wind tunnel are analyzed. The method for solving modes of disturbance and acoustic and vorticity modes components of flow variables is derived theoretically, and its relationship with mass flow fluctuation, total temperature fluctuation and their cross-correlation as known quantities is established. Flow quality measurement experiments are conducted with Mach number varying from 0.3 to 0.7. Modes of disturbance and acoustic and vorticity modes components of flow variables are solved using the established method, and the variation rule of the results with Mach number is analyzed. The uncertainty of modes of disturbance and acoustic and vorticity modes components of flow variables is obtained using Monte Carlo simulation and uncertainty transfer formula. Uncertainty accounts for about 1% of the corresponding variable and most results are only on the order of 0.1%, exhibiting high accuracy of the flow quality measurement test results. The results validate the feasibility of the established method for analysis of modes of disturbances in compressible fluid in the subsonic wind tunnel.

Key words: subsonic wind tunnels, isentropic flow, flow quality, modes of disturbance, Monte Carlo simulation, uncertainty

中图分类号:

V211.71

杜钰锋, 林俊, 王勋年, 熊能. 亚声速风洞可压缩流体扰动模态分析[J]. 航空学报, 2021, 42(6): 124424-124424.

DU Yufeng, LIN Jun, WANG Xunnian, XIONG Neng. Analysis of modes of disturbances in compressible fluid in subsonic wind tunnel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(6): 124424-124424.

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亚声速风洞可压缩流体扰动模态分析

Analysis of modes of disturbances in compressible fluid in subsonic wind tunnel

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