摘要
为了解决近水面飞行器非常规低速气动特性试验难题,分析了航空拖曳水池试验中空气流场特性,采用试验测试方法和计算流体方法(CFD)对试验区的流场特性进行研究,设计了适用于近水面飞行器低速气动特性试验的拖曳水池试验方法。首先对高速航空水池拖车底部试验区进行了风速增量测试,并将CFD仿真结果与测试结果进行对比。再利用CFD仿真开展了前置试验区试验方法优化设计,对前置试验装置进行试验测试和验证。最后利用前置试验方法开展了某型飞机模型验证试验,将模型前置试验结果与模型安装在拖车底部试验结果进行对比。结果表明:在前置试验区不同高度测量点风速试验值与理想值相差在2%以内,形成了一个风速增量稳定区间;采用前置装置进行模型水池拖曳试验时,试验模型的气动特性与实机气动特性更加接近,试验结果更可信,可利用该试验方法开展在拖曳水池中进行的非常规低速气动特性试验。
Experimental method and CFD method are applied to solve arguments on low-speed aerodynamic of seaplane, analysis on the flow feature in aero-towing-tank, and design the new facilities to meeting the experimental requirements. Firstly, the increment on wind velocity in the experimental area below the towing-tank was tested, and the CFD results was compared with test results. Then, the new facilities applied in the forward experimental ar- ea have been designed and optimized by CFD method, and tested to check their capability. After that, a series of seaplane model tests have been launched with the new facilities in the forward experimental area. The research shows that a steady area of wind increment has formed in forward experimental area whose wind velocity error be- tween test data and theory data is limited under 2%. The new facilities applied in forward area make model aerody- namic performance closely with real conditions. It＇ s proved that the new experiment method is credible to launch subsonic aerodynamic experiments in towing-tank.
出处
《科学技术与工程》
北大核心
2015年第23期59-63,共5页
Science Technology and Engineering
关键词
拖曳水池
低速气动特性
水面飞行器
试验方法
CFD
towing tank
low-speed aerodynamic performance
water-surface vehicle
experiment method CFD
