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采用自由涡系理论 ,用时间历程法逐步迭代计算直升机桨叶的环量和涡迹坐标。每一方位反复迭代直至尾迹稳定 ,从而得到其诱导下洗。最后以某直升机为例 ,将求出的诱导下洗用于桨叶气动载荷计算。计算出的气动载荷与实验结果相吻合
Using the theory of free vortex system, the loop and vortex coordinates of helicopter blades are iteratively calculated by time history method. Repeated iterations of each direction until the wake stable, resulting in its induction under the wash. Finally, taking a helicopter as an example, the obtained induced washdown is used to calculate the aerodynamic load of the blade. The calculated aerodynamic load agrees well with the experimental results