起落架舱门表面脉动压力试验研究  

Experimental Research on Surface Fluctuating Pressure of Landing-gear Door

作　　者：荆志伟[1] 肖启之 郭兆电[1] 

机构地区：[1]中航工业第一飞机设计研究院,陕西西安710089

出　　处：《航空科学技术》2015年第12期64-69,共6页Aeronautical Science & Technology

摘　　要：为研究迎角和侧滑角对起落架舱门表面脉动压力的影响，进行了起落架舱门表面脉动压力风洞试验。测量了主起落架舱门表面上50个点的脉动压力，计算了脉动压力系数及其均方根值。采用韦尔奇（Welch）方法估计了脉动压力的功率谱密度函数。试验结果表明：主起落架舱门表面脉动压力系数均方根值位于0～0．18之间；脉动压力系数均方根值随迎角和侧滑角变化总体上具有一定的规律；脉动压力没有出现明显的窄带峰值现象，主要呈现宽带且略带波动的频谱分布。In order to study the influence of angle of attack（AOA） and sideslip angle on surface fluctuating pressure of landing-gear door, wind-tunnel test was carried out for the measurement of fluctuating pressure on the landing-gear door. Pressure fluctuations of 50 testing points on the main landing-gear door were measured, and the fluctuating pressure coefficient and its root mean square（RMS） were obtained by calculation. The power spectral density（PSD） of fluctuating pressure coefficient was evaluated by employing Welch method. The experimental results indicate that the RMS of fluctuating pressure coefficient ranges from 0 to 0.18 and displays certain characteristics versus AOA and sideslip angle to a degree. The fluctuating pressure shows the broad band phenomena with slight fluctuation, while narrow band peak phenomena fails to be discovered.

关 键 词：起落架舱门 风洞试验 脉动压力 均方根 功率谱密度 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]