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为研究风雨对翼伞飞行性能的影响,引入风雨环境翼伞动力学模型,在气动方程中加入雨膜、风荷载、雨荷载等影响因素。利用CFD技术模拟风雨环境:通过网格速度模拟风场,多相流模拟降雨,动网格模拟翼伞姿态变化,并求解时均Navier-Stokes(RANS)方程,对气动方程进行补充与验证,从而完成风雨环境的翼伞动力学建模工作。研究结果表明:CFD模拟结果与NASA经典风洞试验结果接近,验证了翼伞气动方程的合理性;所建模型能够较好描述翼伞在风雨环境下的飞行性能,为复杂环境下翼伞建模提供了新思路。
In order to study the influence of wind and rain on the flight performance of wing parachute, the dynamic model of wing parachute in wind and rain environment is introduced, and the influencing factors such as rain film, wind load and rain load are added into the aerodynamic equation. The wind-rain environment was simulated by CFD technique. The wind-induced wind field, multi-phase flow simulating rainfall and moving grid were used to simulate the change of attitude of the parafoil, and the Navier-Stokes (RANS) equation was solved to supplement and validate the aerodynamic equation. To complete the wind and rain wing parafoil dynamics modeling. The results show that the CFD simulation results are close to the results of the classic wind tunnel test in NASA, and the rationality of the aerodynamic equation of wing parachute is verified. The proposed model can better describe the flight performance of wing parachute under wind and rain conditions. Model provides a new idea.