S弯进气道吞水过程仿真分析  

Simulation Analysis of Water Ingestion Process of S-Shaped Inlet

作　　者：田方超 赵肃 杨瀚超 TIAN Fang-chao;ZHAO Su;YANG Han-chao(AECC Shenyang Engine Research Institute,Shengyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《航空发动机》2022年第6期28-33,共6页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：针对配装S弯进气道的发动机在开展台架吞水试验方案设计中缺少输入条件的问题,模拟重建了F-35飞机的S弯进气道模型,采用数值仿真手段获取了S弯进气道吞水后进气道出口水滴分布图谱。根据工作包线相近的某全尺寸进气道/发动机地面联合试验结果对所采用的仿真方法进行了可靠性验证,仿真与试验获得的进气道总压恢复系数具有较好的一致性,证明仿真方法可靠。开展了吞入喷射装置产生的液态水、吞入雨天空气中的液态水2种条件下的进气道吞水仿真,结果表明:S弯进气道吞水后,在进气道出口形成的水滴分布不同于之前开展的发动机台架吞水试验中所采用的喷水方案,水滴粒子在进气道出口左上角区域较为集中而不是正下方,在进气道入口前喷水产生的水滴分布图谱比真实雨天工作条件更为恶劣。建议在开展发动机台架吞水试验前,通过数值仿真或试验测量获取配装进气道后发动机进口的真实水滴分布,以此为输入条件开展喷水方案设计,以便更好地考核发动机吞水能力。In order to solve the problem of lacking input conditions in the design of water ingestion test scheme for engines equipped with s-shaped inlet,the s-shaped inlet model of F-35 aircraft was reconstructed,and numerical simulations were conducted to obtain the distribution patterns of water droplets formed at the s-shaped inlet exit after water ingestion. The reliability of the simulation method was verified by the combination test results of a full-scale inlet/engine with a similar working envelope. The total pressure recovery coefficient of the inlet obtained from the simulation is in good agreement with that from the test,which indicates the reliability of the simulation method. Inlet water ingestion simulations were carried out under two conditions:liquid water spraying by injection device and rainy atmospheric condition. The results show that the distribution of water droplets formed at the s-shaped inlet exit after water ingestion is different from the water spraying scheme that was used in the engine water ingestion test. The droplets are concentrated in the upper left region of the inlet exit rather than the lower region. The distribution pattern of water droplets produced by spraying water in front of the inlet is severer than that of the rainy atmospheric condition. It is suggested that the real water droplets distribution at the inlet exit be obtained numerically or experimentally before conducting the engine water ingestion test,so as to realistically evaluate the water ingestion capacity of the engine.

关 键 词：S弯进气道 水滴分布 数值仿真 航空发动机 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]