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基于分区对接网格技术分别生成翼身区域和螺旋桨区域网格,并通过求解定常N-S方程模拟螺旋桨滑流影响下全机流动。通过对某螺旋桨飞机的着陆构型(机翼+短舱+螺旋桨+机身+平垂尾)进行数值模拟,结果与实验值吻合较好。模拟结果表明:螺旋桨滑流会改变机翼当地绕流迎角、影响压力分布;当螺旋桨同向旋转时,机身两侧襟翼的分离会出现在不同位置并改变升力在机翼展向的分布,进而对全机产生一个滚转力矩。
The wing area and the propeller area grid are generated respectively based on the partition docking grid technology. The flow of the whole machine under the influence of the propeller slipstream is simulated by solving the steady N-S equation. Through the numerical simulation of the landing configuration of a propeller plane (wing + nacelle + propeller + fuselage + flat-bottomed tail), the results are in good agreement with the experimental data. The simulation results show that the propeller slippery flow changes the angle of attack of the local flow around the wing and affects the pressure distribution. When the propeller rotates in the same direction, the separation of the flaps on both sides of the fuselage will occur at different positions and change the lift in the span direction Distribution, and then the whole machine to produce a rolling torque.