具有尖侧缘的非圆截面机身头部几何参数影响研究  

Investigation of unconventional fore-body section geometry parameter's effect

作　　者：刘刚[1] 邱玉鑫[2] 

机构地区：[1]西北工业大学,西安710072 [2]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《实验流体力学》2006年第4期54-58,62,共6页Journal of Experiments in Fluid Mechanics

基　　金：空气动力学预研项目(413130301)

摘　　要：有侧滑时，尖侧缘的非圆截面机身头部在中等和大迎角下，可具有方向稳定性。在计算研究的基础上，选择了3个不同上、下表面高度和两个不同侧缘角的模型进行了低速风洞试验。风洞试验结果表明，无侧滑时，机身的升力、阻力和俯仰力矩的绝对值都随高度增大而减小，在α〈30°内，表面高度对横向特性影响较小，α=30～600时，呈现复杂的影响趋势；尖锐侧缘机身比圆侧缘机身产生的升力和阻力都大些，但俯仰力矩差别不大；随着迎角的增大，对横向特性的影响明显；有侧滑时，上表面b／α=0．75的机身和下表面b／α=0.25的机身对方向稳定性的影响最显著，尖锐侧缘比圆侧缘对方向稳定性有更大的影响。The fore-body with sharp section angle can produce direction stability at middle-higher angle of attack in the case of side-slip. Having finished the numerical computations, wind tunnel testing was conducted with various body-height and section-angle models. The test results showed in case of no side-slip the absolute value of lift,drag and pitch-moment of the body decreases with the height of body surface increased;for α 〈 30°, height of body surface has little effect on lateral performance, but α = 30 - 60° is more complicated;also showed the lift and drag produced by the body with sharp section angle is higher than the arc-section angle one, but the pitch-moment has little deference with the variation of angle of attack, the effect on lateral performance grows to be obvious;in case of side-slip the body with upper surface height of b/α = 0.75 and lower surface height of b/α = 0.25 has obvious effect on direction stability,and the body with sharp section angle is more effective on direction stability than the arc-section angle ones.

关 键 词：非常规机身 方向稳定性 高度和侧缘角变化 风洞试验 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]