噪声与振动控制2017，Vol.37Issue(3)：47-51,5.DOI:10.3969/j.issn.1006-1355.2017.03.009
基于大涡模拟的水下射流噪声计算方法分析
Analysis of Underwater Jet Noise Prediction Method Based on Large Eddy Simulation
王祖华 1张锦岚1
作者信息
- 1. 武汉第二船舶设计研究所,武汉 430064
- 折叠
摘要
Abstract
Based on the previous study of the numerical method for aerodynamic noise computation under low Mach number, a hybrid method of large eddy simulation (LES) and Lighthill's acoustic analogy theory is established to compute hydrodynamic noise. The experiment data of the underwater jet noise in literatures is used to validate the proposed hybrid method. First of all, a three-dimensional model for underwater jet noise analysis is built according to the size of the experimental model, and the structure meshes for the calculations of flow field and the acoustic field are prepared. The computational domain size is determined by trial method. Then, the jet flow field is simulated by LES. According to the pressure difference, pressure pulsation and velocity inhomogeneity, the characteristic of the turbulence flow field and the stability of computation are analyzed. Afterwards, the necessary acoustic quantities at the nodes of the acoustic mesh are provided by interpolation of the flow field results. The underwater jet noise is simulated based on Lighthill's acoustic analogy theory. Finally, the solutions obtained by the hybrid method are compared with the experimental data of the underwater jet noise. The correctness and feasibility of the hybrid method are verified. Results show that the hybrid method of LES and Lighthill's acoustic analogy theory is able to simulate the underwater jet noise and hydrodynamic noise.关键词
声学/大涡模拟/Lighthill声类比/水动力噪声/混合计算/水下射流Key words
acoustics/large eddy simulation/Lighthill's acoustic analogy/hydrodynamic noise/hybrid method/underwater jet分类
数理科学引用本文复制引用
王祖华,张锦岚..基于大涡模拟的水下射流噪声计算方法分析[J].噪声与振动控制,2017,37(3):47-51,5.
