尾涡/固体边界交互作用下表面压力的数值模拟

当强劲的尾涡撞击到结构时,其表面压力将呈现大幅的变化.这种大幅变化的脉动压力是引起结构震动以及水动力噪声的主要原因之一.许多相关的工程领域都希望使用相对经济的方法对此压力脉动进行有效地预报.本文介绍一种已经嵌入一面元法程序(PROPELLA)的尾涡砰击模型,及其在一吊舱桨尾涡撞击支柱诱导表面压力模拟中的应用.由模拟的时均表面压力分布和相均压力的时序变化与对应的实验数据的比较来看,数值模拟与试验结果吻合较好.

Simulation of Surface Pressure Induced by Vortex/Body Interaction

When a strong vortical wake impacts a structure,the pressure on the impacted surface sees large variations in its amplitude.This pressure fluctuation is one of the main sources causing severe structural vibration and hydrodynamic noise.Economical and effective prediction methods of the fluctuating pressure are required by engineers in many fields.This paper presents a wake impingement model(WIM)that was incorporated into a panel method code,Propella,and its applications in simulations of a podded propeller wake impacting on a strut.Simulated strut surface pressure distributions and variations are compared with experimental data in terms of time-averaged components and phase-averaged components.The pressure comparisons show that the calculated results are in a good agreement with experimental data.