喷砂喷嘴挡板角对航空发动机进气特性的影响  

Effect of Sandblasting Nozzle Baffle Angle on Air Intake Characteristics of Aeroengine

作　　者：冯长胜 王相平 刘作宏 张帅 周伟 闫卫青 FENG Chang-sheng;WANG Xiang-ping;LIU Zuo-hong;ZHANG Shuai;ZHOU Wei;YAN Wei-qing(AECC Shenyang Engine Research Institute,Shenyang 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》2024年第6期155-160,共6页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：为满足航空发动机吞砂试验数值仿真的迫切需求,对吞砂需求和数值模拟理论进行详细阐述,设计了1套吞砂试验设备,并对发动机地面吞砂过程及喷砂嘴挡板角对发动机进气道入口流场影响进行了分析。结果表明:砂粒易受发动机入口截面附近气流特性影响而被裹挟至中心处;流场中的砂粒在径向扩散过程中会出现按粒径分层的现象;发动机进气道入口的截面砂粒粒径分布与质量浓度分布无关;随着挡板角增大,发动机进气道入口截面的砂粒质量浓度分布均匀度增大,其中,最大均匀度相比最小均匀度提高271%。经数值模拟结果验证,该方法能按需确定喷砂设备的参数,在一定程度上提高了喷砂的均匀度,计算精度满足工程需求,完善了吞砂试验数值模拟计算体系。In order to meet the urgent needs of numerical simulation of aero-engine sand ingestion test,the sand ingestion demand and numerical simulation theory are elaborated in detail,a set of sand ingestion test equipment is designed,and the engine ground sand ingestion process and the influence of the baffle angle of the sandblasting nozzle on the flow field at the engine inlet entrance are analyzed.The results show that the sand particles are easily affected by the airflow characteristics near the engine inlet section and are entrained to the center;the sand particles in the flow field will be stratified according to the particle size during the radial diffusion process;the particle size distribution of the cross-section of the engine inlet entrance is independent of the concentration distribution;as the baffle angle increases,the uniformity of the sand particle concentration distribution at the engine inlet entrance section increases,among which the maximum uniformity is 271%higher than the minimum uniformity.The numerical simulation results verify that this method can determine the parameters of the sandblasting equipment on demand,improve the uniformity of the sandblasting to a certain extent,and the calculation accuracy meets the engineering requirements,which improves the numerical simulation calculation system of the sand ingestion test.

关 键 词：吞砂试验 喷砂喷嘴 挡板角 气固两相流 进气道 航空发动机 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]