侧风条件下露天试车台流场特性的数值模拟  

Numerical research on the flow field characteristics of the outdoor test stand under crosswind conditions

作　　者：康宜勤 王司昭 张巍 邢菲 周伟 KANG Yiqin;WANG Sizhao;ZHANG Wei;XING Fei;ZHOU Wei(School of Aerospace Engineering,Xiamen University,Xiamen Fujian 361005,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China)

机构地区：[1]厦门大学航空航天学院,福建厦门361005 [2]中国航发沈阳发动机研究所,沈阳110015

出　　处：《航空动力学报》2024年第9期197-206,共10页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅴ-0001-0050)。

摘　　要：采用CFD数值仿真方法,针对典型露天台进行三维简化建模,建立合适的边界条件,利用侧风设备产生的侧风风场,对露天试车台与发动机进行三维流场仿真。在此基础上,开展典型侧风风速、风向条件下的露天台与发动机联合仿真,分析在不同侧风条件下发动机进口及试验风机出口的流场特性,阐述侧风风速、风向对侧风设备出口风场均匀性及发动机进口气动交界面流场的影响规律。结果表明:随侧风速度增加,侧风装置出口风场品质提高,发动机进口流场畸变程度增加;随侧风角度增加,侧风装置出口风场品质先提高后变坏,而发动机进口气动交界面的平均总压恢复系数和最大周向畸变指数变化趋势不同;最大周向畸变指数更适合评估本研究中发动机进口流场畸变情况。A three-dimensional flow field simulation on the outdoor test stand was performed with the CFD numerical simulation method by using crosswind from the crosswind device,then a simplified model was established,and appropriate boundary conditions were obtained.On this basis,joint simulations of the outdoor test stand and the engine under typical crosswind velocities and directions were carried out.From the results,the flow field characteristics of the crosswind device outlet and the engine inlet were analyzed.And the changes of the spatial uniformity of the flow field at the crosswind device outlet and the flow field at the air interface plane of the engine inlet under the influence of the crosswind velocity and direction were revealed.It can be concluded as follows:with the increase of the crosswind velocity,the quality of the flow field at the crosswind device outlet was improved and the flow field distortion at the engine inlet went worse.With the increase of the crosswind angle,the quality of the flow field at the crosswind device was improved and then went worse,and the average total pressure recovery coefficient and the maximum circumferential distortion index at the air interface plane of the engine inlet shared different variations.The maximum circumferential distortion index is more suitable to evaluate the flow field distortion at the engine inlet in this research.

关 键 词：侧风 动压稳定系数 露天试车台 进气畸变 流场特性 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]