空气动力学学报2024，Vol.42Issue(5)：38-44,7.DOI:10.7638/kqdlxxb-2023.0037
高超声速喷管流场不均匀性分析与改进
Flow quality analysis and improvement of hypersonic nozzle
吴岸平 1范孝华 1郭雷涛 1何超 1许晓斌1
作者信息
- 1. 中国空气动力研究与发展中心超高速空气动力研究所,绵阳 621000
- 折叠
摘要
Abstract
With the development of aircraft,higher requirements are put forward for the accurate prediction of aerodynamic and operating characteristics under different wind tunnel simulation conditions.The flow quality of wind tunnel is one of the main factors affecting the accuracy of wind tunnel test data.A Mach 5.5 nozzle used as the research object in this paper,the non-uniformity of nozzle outlet flow field is studied.The structure of weak waves in nozzle is captured by numerical simulation.The influence of different factors on the quality of nozzle outlet flow field is analyzed,including the profile design method,profile machining accuracy and step joint at profile splicing.Combined with the comparison and analysis of the wind tunnel calibration results,it is concluded that the main factor affecting the quality of nozzle outlet flow field is the step joint at profile splicing.An improvement strategy of segment the nozzle properly is proposed to improve the quality of flow field.关键词
高超声速/流场品质/喷管设计/阶差/喷管分段/优化设计Key words
hypersonic/flow quality/nozzle design/step joint/nozzle segment/optimal design分类
航空航天引用本文复制引用
吴岸平,范孝华,郭雷涛,何超,许晓斌..高超声速喷管流场不均匀性分析与改进[J].空气动力学学报,2024,42(5):38-44,7.
