鼻锥表面气动噪声的数值计算  

The Numerical calculation of Aerodynamic Noise for the Nose Cone

作　　者：郑爱建[1] 付强[1] 张宁宁[1] Zheng Aijian;Fu Qiang;Zhang Ningning(Changcheng Institute of Metrology & Measurement,Beijing,100095,China)

机构地区：[1]中航工业北京长城计量测试技术研究所,北京100095

出　　处：《科技创新导报》2017年第10期25-27,共3页Science and Technology Innovation Herald

摘　　要：该文将流体动力学分析理论与边界元声场分析方法结合起来,在鼻锥模型中,导入流场脉动压力数据并在声学网格上转换成气动偶极子声源边界条件,实现了3种不同形状的鼻锥模型在高速气流场中气动噪声声场的数值计算。通过对3种模型的气动噪声声压级比较发现,头部为椭球形的鼻锥的气动噪声比半球形鼻锥小,而且头部长度占总长度比例越大,气动噪声越小。In this paper,the analysis theory of fluid dynamics is combined with the acoustic boundary element analysis method,and thenthe numerical caclculation of aerodynamic noise for different snose cones models in high speed airflow field is realized.Through thecompare results of the noise sound pressure level(SPL)of these three models we found that the aerodynamic noise of the nose cone thatwith a ellipsoid head is lower than the one with a hemispherical head,and the ellipsoid nose cone has lower flow-induced SPL thanthose two commercial nose cone models at relative high air flow velocities at most frequencies.

关 键 词：鼻锥 气动噪声 数值计算 

分 类 号：P73[天文地球—海洋科学]