大型涡桨飞机发动机短舱对机翼气动影响及控制

Aerodynamic Effects and Control of Large Turboprop Aircraft Nacelles on Wings

为了研究大型涡桨飞机发动机短舱对机翼的气动干扰,首先分析短舱机翼的气动干扰对飞机失速特性和最大升力系数的影响,总结短舱机翼气动干扰的流动机理,然后结合实际案例进行工程应用分析。结果表明:短舱对机翼的气动影响主要表现在失速特性和最大升力系数方面;优化设计短舱控制剖面能有效改善飞机失速特性;通过精细设计调整短舱与机翼前缘涡流位置和强度,可以使短舱对机翼产生的气动影响符合设计预期。研究结果为改善大型涡桨飞机短舱对机翼气动干扰提供一定方法。

In order to study the aerodynamic interference of nacelles on wings of large turboprop aircraft,the effects of nacelles'aerodynamic interference on stall characteristics and maximum lift coefficient of aircraft are firstly analyzed,the flow mechanism of nacelles'aerodynamic interference is summarized,and then the engineering application is analyzed based on practical cases.The results show that the aerodynamic effects of nacelle on the wings are mainly manifested in the stalling characteristics and the maximum lift coefficient.The optimized design of nacelle control profile can effectively improve aircraft stall characteristics.The aerodynamic effect of the nacelle on wings can meet the design expectation by adjusting the position and strength of the vortex between nacelle and wing leading edge.The results provide some methods for improving the aerodynamic interference of large turboprop nacelles on wings.