摘要
中国空气动力研究与发展中心(China Aerodynamics Research and Development Center,CARDC)0.6 m连续式跨声速风洞是一座采用干燥空气作为试验介质的变密度回流式风洞。本文在前期风洞总体性能调试的基础上,通过风洞试验段不同壁板(槽壁/孔壁)型式及设计参数优化、压缩机尾罩和拐角段等洞体回路部段降噪、壁板扩开角和主流引射缝等机构调节、半柔壁喷管和二喉道以及驻室抽气系统控制等措施,对风洞流场品质进行改进,取得了突出进步。主要研究成果包括:总压控制精度优于0.1%;试验段马赫数控制精度优于0.001;跨超声速试验段气流压力脉动系数ΔC_p≤0.8%;平均气流偏角优于0.1°;稳定段出口气流湍流度ε≤1.5%;试验马赫数分布均匀性和标模试验数据精度等指标均达到国际先进水平。该流场品质调试研究充分验证了连续式跨声速风洞实现更高流场品质的可行性,为中国大型连续式跨声速风洞方案设计及国际先进流场品质保证提供了参考。
The 0.6 m continuous transonic wind tunnel of China Aerodynamics Research and Development Center(CARDC)is a circling wind tunnel using variable density dry air as working medium.Depending on the general performance calibration,the flow quality of the wind tunnel is tested in different conditions by parameters optimization of the walls(slotted or perforated),acoustics treatments on the compressor tailor and the forth corner,re-adjusting the expansion angles of the test section walls and the re-entry slots,controlling the semi-flexible nozzle,the second throat and the plenum chamber pumping system.Testing results of the flow quality indicate that:The total pressure control precision in settling chamber is better than 0.1%and the Mach number control precision in test section is better than 0.001;The pressure fluctuating coefficientΔCp of the core flow in transonic test section is below 0.8%;The average flow deflection was better than 0.1°;Fluctuation of Mach number distribution and the standard model testing precision have metthe requirements.The flow quality calibration demonstrated fully feasibility of the wind tunnel design scheme.The experience of 0.6 m wind tunnel provides a reference for the scheme design of China’s large continuous transonic wind tunnel and the quality assurance of international advanced flow field.
作者
陈吉明
吴盛豪
廖达雄
裴海涛
吕金磊
熊波
CHEN Jiming;WU Shenghao;LIAO Daxiong;PEI Haitao;LYU Jinlei;XIONG Bo(Key Laboratory of Unsteady Aerodynamics and Flow Control of Ministry of Industry and Information Technology,College of Aerospace Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;High Speed Aerodynamics Institute,China Aerodynamics Research and Development Center,Miyang 621000,China)
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2021年第2期236-242,共7页
Journal of Nanjing University of Aeronautics & Astronautics
基金
江苏高校优势学科建设工程资助项目。
关键词
连续式风洞
跨声速风洞
流场品质
流场校测
continuous wind tunnel
transonic wind tunnel
flow-field quality
wind tunnel calibration
