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中文摘要：
为了分析螺旋桨滑流引起无人飞机水平尾翼气体流动的变化规律,对比了有、无螺旋桨滑流作用下的数值结果.结果表明：在螺旋桨滑流作用下,气流绕过机翼后形成更强的旋流且呈现更强的下洗作用.该气流绕过水平尾翼后,改变了当地入流迎角,并使得水平尾翼近表面的流动速度增大,由此降低了水平尾翼升力、微量增加了阻力以及提高了上仰力矩.随飞行迎角的变化,滑流作用对阻力的影响相对较大——最小阻力系数两端变化量逐渐增加.
英文摘要：
In order to analyze the change law of the aerodynamic characteristics of the unmanned aerial vehicle （UAV） horizontal tall under the effects of the propeller slipstream, the numerical results were compared between cases with and without propeller drive. It is found that, under the propeller slipstream, the flow around the wing is reinforced and a stronger downwash appears. The induced flow changes the local incidence of the horizontal tail and speeds up the flow velocity on the tail surface. So, the lift coefficient of the horizontal tall de- creases, the drag coefficient increases a little, and the nose-up pitching moment rises. The drag force on the wing under the propeller slipstream changes relatively obviously with the rise of the attack angle.
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