论文部分内容阅读
以分析头部波系对气动舵颤振的影响为目的,采用CFD/CSD耦合算法。在耦合中采用保形动网格策略保持弹身和舵面的几何外形。对单独舵面和舵身组合体计算发现:与单独舵面相比,舵身组合体颤振边界随马赫数升高下降更快;在Ma=7时,单独舵面尚未颤振而组合体中的舵面已颤振。其机理为头部波系对气动舵的影响:马赫数升高,头部圆锥激波内移,膨胀低压区缩小,舵面上激波和外流场的总影响区扩大,气动舵更易颤振。
For the purpose of analyzing the influence of the head wave system on the flutter of the air-propeller, the CFD / CSD coupling algorithm is used. Conformal moving grid strategy is adopted in the coupling to maintain the geometric shape of the body and the rudder surface. Comparing the single rudder and the rudder body, it is found that the flutter boundary of the rudder body assembly decreases faster with the Mach number than that of the single rudder surface. At Ma = 7, the single rudder surface has not flutter but the combined body The rudder has flutter. The mechanism is the influence of the head wave system on the aerodynamic rudder: the Mach number increases, the head conical shock moves inward, the expansion low pressure area shrinks, the total area of influence of the shock wave and the outflow field on the rudder surface expands, and the aerodynamic rudder becomes more easy to vibrate Vibration