半柔壁喷管型面设计与校准方法研究  

Research on Design and Calibration Method of Semi-flexible Nozzle Contour

作　　者：崔晓春[1,2] 张刃 李庆利[1,2] 赵林成 李兴龙[1,2] CUI Xiaochun;ZHANG Ren;LI Qingli;ZHAO Lincheng;LI Xinglong(AVIC Aerodynamics Research Institute,Shenyang 110034,China;Aero Science Key Lab of High Reynolds Aerodynamic Force at High Speed,Shenyang 110034,China)

机构地区：[1]中国航空工业空气动力研究院,沈阳110034 [2]高速高雷诺数气动力航空科技重点实验室,沈阳110034

出　　处：《南京航空航天大学学报》2022年第5期915-926,共12页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：半柔壁喷管是跨超声速风洞柔壁喷管的一种类型,由喉道块、可变型面的柔板及出口端板等部分构成。半柔壁喷管具有长度短、支撑机构数量少、建设成本低、系统可靠性高、运行维护成本低等优点。鉴于半柔壁喷管的各项优点,航空工业气动院的0.6 m连续式跨声速风洞和2.4 m连续式跨声速风洞均采用半柔壁喷管。本文以0.6 m风洞的半柔壁喷管为例,详细介绍航空工业气动院的半柔壁喷管型面设计方法,主要内容包括曲率连续的喷管无黏型面设计方法、曲率连续的附面层位移厚度计算方法、喷管型面的迭代设计方法、半柔壁喷管设计方法和喉道块上游型线设计方法。本文提出了一种根据计算流体动力学(Computational fluid dynamics,CFD)和流场校测结果调节附面层位移厚度的喷管型面校准方法,有效地提高了喷管型面出口马赫数的精准度。半柔壁喷管流场校测结果表明,半柔壁喷管菱形区的马赫数偏差小,流场均匀性良好,达到国军标先进水平。Semi-flexible nozzle is a type of flexible nozzle of transonic wind tunnel,which consists of throat block,flexible plate with variable contour and outlet end plate.The semi-flexible nozzle has the advantages of short length,few supporting mechanisms,low construction cost,high system reliability and low operation and maintenance cost,etc.In view of the advantages of semi-flexible nozzle,semi-flexible nozzle is adopted in 0.6 m continuous transonic wind tunnel and 2.4 m continuous transonic wind tunnel of Aerodynamics Research Institute(ARI)of AVIC.Taking the semi-flexible nozzle of the 0.6 m wind tunnel as an example,this paper introduces the design method of the contour of semi-flexible nozzle of ARI of AVIC in detail.The main contents include the design method of the inviscid nozzle contour with continuous curvature,the calculation method of the displacement thickness of the boundary layer with continuous curvature,the iterative design method of the nozzle contour,the design method of the semi-flexible nozzle,and the design method of contour upstream of the throat block.This paper presents a calibration method of nozzle contour,which adjusts the displacement thickness of the boundary layer according to the results of computational fluid dynamics(CFD)and flow field calibration and effectively improves the accuracy of the Mach number at the outlet of the nozzle.The results of flow field calibration of semi-flexible nozzle show that the Mach number deviation in the rhombus region of the semi-flexible nozzle is small,and the flow field uniformity is good,reaching the advanced level of the national military standard.

关 键 词：跨声速风洞 半柔壁喷管 喷管型面设计 流场校测 喷管调试 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]