飞机挂载吊舱爬升性能快速估算方法研究

摘要

The lift-drag characteristics of a certain type of ifghter changes when mounting a large lfying off photography pod under the wing, which affects the aircraft climbing performance, it is directly related to the safety of aircraft lfight test. As an example, this paper used the engineering estimation method to calculate the lift coefifcient variation, drag coefifcient variation of aircraft mounting a pod. And get the calculation results of climbing performance of aircraft with a mounting pod through the superposition calculation between the obtained variations and the climbing performance test results of “clean” aircraft without pod. The calculation results show that, this fast estimation method has high accuracy and efifciency, good engineering practicability, also it has a certain reference value of guiding the aircraft modiifcation and lfight test.%某型歼击机翼下挂载大型伴飞摄影吊舱后，其升阻特性发生变化，从而影响飞机爬升性能，这直接关系到飞机试飞安全。本文以此为例，采用工程估算方法计算飞机挂载吊舱后升、阻力系数变化量，然后将飞机无外挂“干净”构形的爬升性能试飞结果与得到的变化量进行叠加计算，得到飞机挂载吊舱后的爬升性能计算结果。计算结果表明，此种快速估算方法计算精度和效率较高，具有很好的工程实用性，对指导飞机改装和试飞有一定的参考价值。