发动机短舱内型面参数设计对进气效率的影响研究  

Computational Study of The Effect of CR and L_D on Nacelle Inlet

作　　者：肖毅 马经忠 胡志东 陈雅丽 

机构地区：[1]中航工业洪都,江西南昌330024

出　　处：《教练机》2014年第1期24-28,共5页Trainer

摘　　要：发动机短舱是亚音速运输机的重要部件之一,其设计需要考虑多方面的影响因素。其中,收缩比与扩散段长度是短舱进气道内型面设计的重要参数,对短舱的进气效率有直接影响。本文从某型飞机基于某型发动机设计短舱出发,在计算流体动力学软件Fluent中对单独短舱的流场进行了数值模拟,着重分析了进气道出口截面的总压恢复和流场畸变情况,并探讨了收缩比、扩散段长度对进气效率的影响规律。Nacelle is one of important configurations of subsonic transport aircraft and its design needs considerations from many aspects. Contractive Ratio(CR) and length of diffused section(LD) are very important parameters in nacelle inlet design. The two parameters have direct influence on the efficiency of inlet. In this paper, for investigating the sensitivity of CR and LD, numerical simulations of different isolated nacelles are carried out and results of total pressure recovery coefficient and inlet distortion coefficient are obtained.

关 键 词：短舱 收缩比 扩张段长度 进气效率 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]