低速风洞推力矢量试验背撑干扰特性试验研究

Researches of dorsal support interference in low speed wind tunnel thrust vector test

背撑供气支撑形式是目前FL-8低速风洞进行大迎角推力矢量试验所采用的主要支撑形式之一,背撑系统对试验模型的气动干扰量的修正虽然不影响矢量喷流对飞机气动特性的影响量,但直接影响试验测量准度。试验研究采用两步法,在FL-8风洞中测定了背撑系统对两种军机模型气动力测量的影响,探讨了几种不同形式的假背支杆及背撑支架(弯刀和拖箱)对飞机气动力的干扰特性。

Dorsal air-supply is a main type of support in FL-8 low high angle of attack. Though the correction of dorsal support system＇ speed wind tunnel thrust vector test at s aerodynamic interference to the test model do not affect the influences that the vector ejection exert to the airplane＇s aerodynamic characteristics, but it affect directly the measure precision of test. The two-step method had been adopted in this test in FL-8 wind tunnel and the influences that the dorsal support system exert on two military airplane models has been determined, influence properties of several different types of pseudo-support-rod and dorsal support（ curve-strut and slip-box） on the airplane＇s aerodynamic forces has been discussed.