低速风洞带螺旋桨动力模型支架干扰实验研究

本文给出了 FL-8风洞中螺旋桨处于不同位置的三个飞机模型支架干扰实验结果,分析了影响带螺旋桨动力的飞机模型支架干扰的因素。实验表明,由于螺旋桨滑流的诱导和夹带作用,使腹撑支杆附近的气流沿轴向加速;由于模型支杆的存在,将影响螺旋桨滑流的空间位置和尺寸,这些都将影响支架干扰量的大小,因此,一般不能用无螺旋桨动力模型的支架干扰数据代替有螺旋桨动力模型的支架干扰数据。实验结果还表明,滑流存在对阻力、俯仰力矩支架干扰有一定影响,其影响量与螺旋桨的位置和拉力系数有关。滑流对升力、滚转力矩和偏航力矩支架干扰无明显影响。除单发右停顺状态外,滑流对侧向力支架干扰无明显影响。

THE EXPERIMENT INVESTIGATION OF SUPPORT INTERFERENCE WITH PROPELLER ENGINE MODEL IN LOW SPEED WIND TUNNEL

In This paper,some testing results of support interferncefor three airplane model with propeller engines that are set on severalpositions in FL-8 low speed wind tunnel have been shown and the fac-tors of influence on support interference with propeller enginc airplanemodel also have beee analysed.Testing results indicated that the flowncar support will be accelerated along wind direction due to inducingand carrying effects of slipstream of propeller and the position and sizeof the slipstream of propeller will be changed due to the exist of support,both factors mentioned above would have influence on support interference.Therfore we can not use the data of support interference without propellerengine instead the data of support interference with propeller engine.The testing also show that there are some influence on support in-terfernce for drag and pitching moment components due to slipstream ofpropeller and the amoutof influence depends on the position of propelleron the airplane model and the value of thrust coefficient of Propeller.The influence of slipstream of propeller on support interference forlift,rolling moment and yewing moment components are not obviousand so does support interference of side force component except thatalone propeller engine on the right wing is stalled.