空气动力学学报Issue(2)：225-231,7.DOI:10.7638/kqdlxxb-2013.0015
风洞阻塞度对起落架气动噪声测量影响的数值模拟研究
Numerical investigation to wind-tunnel-blockage effects on aerodynamic noise measurements of a landing gear
胡宁 1郝璇 1苏诚 1张卫民 1马汉东1
作者信息
- 1. 中国航天空气动力技术研究院，北京 100074
- 折叠
摘要
Abstract
In order to provide a basis and some references for experimental study on aerody—namic noise of landing gears,a numerical simulation is carried out for a four—wheel rudimentary landing gear (RLG)model using the delayed detached eddy simulation (DDES)based on the S—A turbulent model.Slip wall boundary condition with different section areas are used to mimic wind tunnels with different sizes,and the non—wind—tunnel case is simulated with far field boundary conditions for the side walls and the floor.The blockage ratioβis varied from 0 to 8.8%.Time—averaged surface pressure coefficient and surface sound pressure level (SPL)are calculated from the simulated unsteady flow field.The results show that the mean surface SPL decreases with in—creasingβin general.There is a thresholdβranged of roughly 4% ~ 5%.The mean surface SPL varies sharply whenβis within this range,and is insensitive withβwhen it is out of this range. The mostβ—sensitive part is the front wheel,while the most insensitive is the back wheel.This demonstrates a close relation between the aeroacoustic properties and mean flow properties at dif—ferent blockage ratios.关键词
起落架/气动噪声/阻塞度/大涡模拟/洞壁干扰Key words
landing gears/aerodynamic noise/blockage/detached eddy simulation/wind tunnel wall interference分类
航空航天引用本文复制引用
胡宁,郝璇,苏诚,张卫民,马汉东..风洞阻塞度对起落架气动噪声测量影响的数值模拟研究[J].空气动力学学报,2015,(2):225-231,7.
