| 不同攻角下压气机叶栅涡流噪声辐射特性的研究 |
| |
| 引用本文： | 柳晓丹,杨爱玲,戴韧,陈康民. 不同攻角下压气机叶栅涡流噪声辐射特性的研究[J]. 动力工程, 2011, 31(7) |
| |
| 作者姓名： | 柳晓丹 杨爱玲 戴韧 陈康民 |
| |
| 作者单位： | 上海理工大学能源与动力工程学院,上海,200093 |
| |
| 基金项目： | 国家自然科学基金资助项目(50976072); 2009年中国教育部博士点专项基金资助项目(20093120110004); 上海市重点学科建设项目(J50501) |
| |
| 摘 要： | 采用大涡模拟模型和边界元方法对压气机叶栅的非定常流场与声场进行了分析,研究了来流攻角对叶栅尾缘非定常涡脱落及其噪声辐射特性的影响.结果表明：压气机叶栅流场中存在着尾缘涡脱落现象,尾缘涡脱落的强度随着攻角的变化而变化.在较大的正攻角下,吸力面存在的分离涡与下游的尾涡相互影响,引起较大的升力脉动,使得噪声辐射增强;而在较大负攻角下,压力面的分离涡同样影响尾缘涡的脱落,噪声辐射水平也有增强趋势.来流攻角对噪声辐射的指向性影响不大.声压级的最小值出现在阻力系数最小的攻角下.
|
| 关 键 词： | 压气机 叶栅 攻角 大涡模拟 尾涡脱落 噪声预测 |
Research on Vortex Noise Radiation of Compressor Cascade Under Different Attack Angle |
| |
| LIU Xiao-dan,YANG Ai-ling,DAI Ren,CHEN Kang-min. Research on Vortex Noise Radiation of Compressor Cascade Under Different Attack Angle[J]. Power Engineering, 2011, 31(7) |
| |
| Authors: | LIU Xiao-dan YANG Ai-ling DAI Ren CHEN Kang-min |
| |
| Affiliation: | LIU Xiao-dan,YANG Ai-ling,DAI Ren,CHEN Kang-min(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China) |
| |
| Abstract: | In order to investigate the influence of attack angle of compressor cascades on unsteady vortex shedding at trailing edge and the noise radiation,large eddy simulation model and boundary element method were used to analyze the unsteady flow and acoustic field.Results show that unsteady vortex shedding exists at the trailing edge of compressor cascade,and the shedding strength varies with attack angles.The vortex separation on suction side with large positive attack angle affects the downstream trailing vort... |
| |
| Keywords: | compressor cascade angle of attack large eddy simulation trailing-edge vortex shedding noise prediction |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
