格栅式反推装置性能研究

Research on Performance of the Grid Type Reverse Thruster

采用全三维计算流体模拟技术,对带格栅式反推构型的某大型客机进行外流场数值模拟,计算得到飞机着陆滑跑期间不同速度工况下的反推流场,并从数值模拟结果提取获得反推装置性能。在获取得到的反推性能基础上,建立了飞机着陆期间打开反推时的运动学方程,计算得到飞机着陆性能:飞机着陆期间反推工作时间为29.64s,滑跑距离为1337.26m,相比于反推不打开情况下的着陆滑跑距离,缩短约4%,与实际情况相当。对相关计算结果的对比验证得到,所建立的反推装置性能计算方法及反推开启时飞机的着陆性能计算方法可靠有效,对飞行试验设计有工程应用价值。

Using full three-dimensional computational fluid simulation technology, the paper carried out the external flow field numerical simulation of a large passenger aircraft with a grid-type reverse thrust configuration, and obtained the reverse thrust flow field under different speed conditions during the landing and taxiing period. The results of numerical simulation were extracted to obtain the performance of the reverse thruster. On the basis of the obtained reverse thrust performance, the kinematics equations with backstepping on during the landing of the aircraft were established, and the landing performance of the aircraft was calculated. The comparison and verification of related calculation results show that the calculation method for the performance of the thrust reverser established in this paper and the calculation method of the aircraft’s landing performance when the reverse thrust is turned on are reliable and effective.