【摘 要】
：
研究了飞机在不同飞行高度、速度和姿态下,不同外挂物质量对投放安全性的影响。采用CFD方法计算外挂物所受气动力,通过六自由度刚体动力学方程计算外挂物的投放轨迹和姿态变
【机 构】
：
北京航空航天大学航空科学与工程学院,
论文部分内容阅读
研究了飞机在不同飞行高度、速度和姿态下,不同外挂物质量对投放安全性的影响。采用CFD方法计算外挂物所受气动力,通过六自由度刚体动力学方程计算外挂物的投放轨迹和姿态变化。准定常方法在计算外挂物下落轨迹的每个步长内,认为外挂物和载机都处在定常流场中,载机在投放过程中保持原有运动状态。通过算例给出了典型外挂物在不同速度、高度、姿态下投放的运动轨迹,分析了对安全投放有重要影响的因素,提出了减少外挂物投放风险的建议。
The impact of the quality of different types of outfits on the safety of launching at different flight altitudes, velocities and postures is studied. The CFD method is used to calculate the aerodynamic force of the plug-in, and the trajectory and attitude change of the plug-in object are calculated by the six-degree-freedom rigid body dynamics equation. In the quasi-routine method, every step of the drop trajectory of the plug-in is calculated, it is considered that the plug-in object and the carrier are in a steady flow field, and the carrier maintains the original movement state during the drop. Through the examples, the movement trajectory of the typical plug-in objects at different speeds, altitudes and attitudes is given. The factors that have an important impact on the safety delivery are analyzed, and the suggestions to reduce the risk of the plug-in objects are put forward.
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