| 不同压比状态下超声速射流冲击斜板的声场/流场特性 |
| |
| 引用本文： | 齐龙舟,冯和英,赵鲲,张俊龙,覃晨. 不同压比状态下超声速射流冲击斜板的声场/流场特性[J]. 航空动力学报, 2021, 36(12): 2642-2651. DOI: 10.13224/j.cnki.jasp.20210042 |
| |
| 作者姓名： | 齐龙舟 冯和英 赵鲲 张俊龙 覃晨 |
| |
| 作者单位： | 湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201;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,四川绵阳621000;中国空气动力研究与发展中心气动噪声控制重点实验室,四川绵阳621000;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,四川绵阳621000 |
| |
| 基金项目： | 国家自然科学基金（51875194）; 空气动力学国家重点实验室研究基金（SKLA2019020101） |
| |
| 摘 要： | 为研究超声速射流冲击斜板的噪声特性及声源特性,针对不同压比下,超声速射流流场及声场分别进行了高频PIV(particle image velocimetry)测量与远场噪声测量.PIV测量结果可观测到激波格栅形成过程以及冲击斜板对它的影响.声场测量结果可捕捉到自由射流与冲击射流中不同的纯音频率随压比增加的转变过程.通过...
|
| 关 键 词： | 射流冲击斜板 模态分析 啸声 PIV流场分析 传声器弧阵列 |
| 收稿时间： | 2021-04-26 |
Sound field/flow field characteristics of supersonic jet impinging on inclined plate under different pressure ratios |
| |
| QI Longzhou,FENG Heying,ZHAO Kun,ZHANG Junlong,QIN Chen. Sound field/flow field characteristics of supersonic jet impinging on inclined plate under different pressure ratios[J]. Journal of Aerospace Power, 2021, 36(12): 2642-2651. DOI: 10.13224/j.cnki.jasp.20210042 |
| |
| Authors: | QI Longzhou FENG Heying ZHAO Kun ZHANG Junlong QIN Chen |
| |
| Affiliation: | 1.Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology,Xiangtan Hunan 411201,China2.State Key Laboratory of the Aerodynamics,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China3.Key Laboratory of Aerodynamic Noise Control,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China |
| |
| Abstract: | In order to study the noise characteristics and sound source characteristics of the supersonic jet impinging on the inclined plate,the flow field and sound field of the supersonic jet under different pressure ratios were measured by high-frequency PIV （particle image velocimetry） and far-field noise.PIV measurement results can be used to observe the formation process of the shock grid and the impact of the inclined plate.The sound field measurement results can be used to capture the transition process of different tone frequencies in the free jet and the impinging jet as the pressure ratio increased.By comparing each tone mode and flow field mode one by one,the sound source characteristics of each tone mode can be distinguished.When pressure ratio was between 2.0-3.2,there were five tone modes:the tone of A mode was taken as the shear layer large-scale vortex shedding frequency,and the flow field presented a coaxial mode;the tone frequencies of the d and e modes were mainly taken as an impinging tone frequency;when the e mode appeared,the flow field transformed into a spiral mode,which was an unstable mode;when pressure ratio was more than 2.53,the tone mode was stable to a single mode B,and the tone of the B mode was taken as the screech frequency.The structure was converted back to the coaxial mode,and the screech frequency was not sensitive to the presence or absence of the inclined plate;the tone frequency of the B mode gradually decreased with the increase of the pressure ratio,and for the second harmonic frequency there was a strong sound wave radiation in the direction of the smaller amplitude of the fundamental frequency. |
| |
| Keywords: | jet impinging on the inclined plate modal analysis screech tone PIV flow field analysis microphone arc array |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
