空气动力学学报Issue(5)：643-648,6.DOI:10.7638/kqdlxxb-2014.0025
基于 DDES 算法的有扰流片腔体气动噪声分析
DDES of aeroacoustic over an open cavity with and without a spoiler
摘要
Abstract
In order to obtain a further understanding of the cavity aeroacoustics and test the noise suppression effect using a saw tooth spoiler,aeroacoustics characteristic over an open cavity with a length to depth ratio of 5∶1 at Mach 0.85 are investigated in the present study.The CFD simulations are performed by delayed detached eddy simulation (DDES)based on Spalart-Allma-ras one equation turbulence model.The results obtained from clean cavity prediction are com-pared with experimental sound pressure level (SPL)data from QinetiQ,UK.It can be observed from the results that the tone amplitude of the 2 nd and 3 rd dominant modes are generally well pre-dicted (within 2 dB),whilst the 1 st and the 4 th tones are not so well resolved.In order to evaluate leading-edge spoiler which is widely used as a passive control method on cavity noise suppression, the main focuses are sound pressure level of cavity with a leading-edge saw tooth spoiler.Accord-ing to the comparison of computational SPL results between cavity with spoiler and clean cavity, the saw tooth spoiler reduce the 2 nd dominant tone amplitude over 10dB,and the over-all SPL a-bout 5dB,significant noise suppression effect for open cavity is validated.关键词
腔体/气动噪声/扰流片/声压级/DDESKey words
cavity/aeroacoustic/spoiler/sound pressure level/DDES分类
航空航天引用本文复制引用
刘瑜,童明波,Zhiwei Hu..基于 DDES 算法的有扰流片腔体气动噪声分析[J].空气动力学学报,2015,(5):643-648,6.基金项目
江苏省高校优势学科建设工程资助项目；江苏省研究生培养创新工程 KYLX 0296；中央高校基本科研业务费专项资金资助 （）
