基于流体网络法的射流式风洞系统流动计算分析  

Flow calculation and analysis of jet-type wind tunnel system based on fluid network method

作　　者：孙科[1] 张久峰 刘涛[1] 梁靖国 宋江涛[1] SUN Ke;ZHANG Jiu-feng;LIU Tao;LIANG Jing-guo;SONG Jiang-tao(Engine Department,Chinese Flight Test Establishment,Xi’an 710089,China;Xi′an Yuanfang General Aviation Technology Development Co.,Ltd.,Xi′an 710089,China)

机构地区：[1]中国飞行试验研究院发动机所,西安710089 [2]西安远方航空技术发展有限公司,西安710089

出　　处：《沈阳航空航天大学学报》2022年第6期8-14,共7页Journal of Shenyang Aerospace University

基　　金：航空科学基金(项目编号:ASFC-2019ZD030006)。

摘　　要：针对下吹式自由射流风洞的流动阻力评估问题,使用流体网络法将风洞系统简化为由典型元件组成的流体网络结构。各个元件均按照理论方法或经验方法计算其流动阻力,按照风洞设计标准设计得到主要元件的结构尺寸。对该风洞进行计算,得到系统内部沿程气动参数变化规律,分析表明系统流动阻力在扩张段处最大。通过设置不同入口压力进行计算,得到对应流量及试验段风速数据。结合所选风机的性能曲线,在风机额定功率下,得出风洞试验段气流马赫数可达0.47。计算结果可为后续进一步提升试验能力和气源系统设计选型时提供数据支撑。To evaluate the flow resistance in downdraft free jet wind tunnel,the flow network method was used to simplify the tunnel system into a fluid network composed of typical elements.The flow resistance of each element was calculated by a theoretical or empirical method,and according to the design standard of the wind tunnel,the structural dimensions of the main components were obtained.The calculation results show the variation law of aerodynamics parameters in the system,the flow resistance in the expansion section is the largest.The corresponding flow rate and wind speed in the test section were calculated by setting different inlet pressures.According to the performance curve of the fan,the Mach number in the wind tunnel can reach 0.47 at the rated power.The calculated results can provide data support for the design and selection of air source system in the further improvement of test capability.

关 键 词：射流式风洞 流体网络法 摩擦管流 流动阻力 风洞设计 

分 类 号：V216.8[航空宇航科学与技术—航空宇航推进理论与工程]