粒子分离器砂尘分离效率试验参数影响分析  

Influence Analysis of Test Parameters on Sand Dust Separation Efficiency of Particle Separator

作　　者：徐大成 陈冰 XU Dacheng;CHEN Bing(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou Hunan 412002,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《航空发动机》2021年第6期63-68,共6页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：砂尘试验是评估和验证粒子分离器砂尘分离能力的核心方法,砂尘分离效率试验结果除受试验器测试精度影响,还与砂尘投放方式直接相关。为了摸清某粒子分离器砂尘分离效率的试验影响因素,结合流动机理分析、CFD仿真和试验方法,分别针对粒子分离器进口粒子分布均匀性、砂尘浓度和喷砂速度3种因素对砂尘分离效率的影响进行了分析。结果表明:粒子分离器进口砂尘分布均匀性是影响砂尘试验结果的主要因素,在给定浓度分布模型下,进口砂尘非均匀分布比非均匀分布砂尘分离效率降低接近7%;进口砂尘浓度在2000 mg/m;范围内变化不会对分离效率试验结果产生显著影响;喷砂速度增大,大粒径粒子受壁面反弹影响,使粒子分离器总分离效率呈下降低趋势。Sand dust test is the core method to evaluate and verify the sand dust separation ability of particle separator. The results of sand dust separation efficiency test are not only affected by the precision of the tester,but also directly related to the sand dust delivery mode. In order to find out the test influencing factors of sand dust separation efficiency of a particle separator,the effects of particle distribution uniformity,sand dust concentration and sand blasting velocity on the separation efficiency of particle separator were analyzed based on the analysis of flow mechanism,CFD simulation and test methods. The results show that the sand dust distribution uniformity at the inlet of particle separator is the main factor affecting the sand dust test results. Under the given concentration distribution model,compared with the non-uniform distribution of inlet sand dust,the separation efficiency of non-uniform distribution of sand dust decreases by nearly 7%.The inlet sand dust concentration within 2000 mg/m;will not have a significant impact on the separation efficiency. With the increase of sand blasting velocity,the total separation efficiency of particle separator decreases due to the influence of wall rebound of large size particle.

关 键 词：粒子分离器 分离效率 机理分析 仿真分析 试验 航空发动机 

分 类 号：V211.17[航空宇航科学与技术—航空宇航推进理论与工程]