CAJ | 학술논문

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.
당강경적미와당격도결구시,기표면압력장정현대폭적변화.저충대폭변화적맥동압력시인기결구진동이급수동력조성적주요원인지일.허다상관적공정영역도희망사용상대경제적방법대차압력맥동진행유효지예보.본문개소일충이경감입일면원법정서(PROPELLA)적미와팽격모형,급기재일조창장미와당격지주유도표면압력모의중적응용.유모의적시균표면압력분포화상균압력적시서변화여대응적실험수거적비교래간,수치모의여시험결과문합교호.
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.