航空学报2025，Vol.46Issue(12)：85-96,12.DOI:10.7527/S1000-6893.2024.31028
稀薄流区的摩阻测量技术及减阻试验
Skin friction measurement technique in rarefied regime and drag force reduction test
摘要
Abstract
This paper develops a skin friction measurement technique based on skin friction balance for rarefied flow applications,and applies the technique to improve surface smoothness and reduce drag.A comparative measurement experiment is conducted in a hypersonic low-density wind tunnel,involving flat plate models and skin friction balances with smooth and conventional wall surfaces.The flat plate models are arranged symmetrically with smooth and con-ventional wall surfaces,each paired with skin friction balances having induction surfaces corresponding to the wall sur-face type.The balance structure is designed based on the cantilever beam principle,considering overload protection and thermal insulation.Micro-friction loading is achieved through load increment method to calibrate the balance clos-est to the experimental conditions.Through quantitative evaluation and active control,the error in wind tunnel tests in-troduced by surface pressure can be controlled within 1%and the error introduced by the offset installation of the bal-ance floating head can be controlled within 2%.Seven repetitive tests at the Mach number of 22 show that the mea-surement standard deviation of skin friction balance is less than 2.9%;the smooth wall surface is more effective in re-ducing drag compared to the conventional wall surface,with an average drag reduction rate of 25.1%.关键词
稀薄流/摩阻天平/光滑壁面/减阻/风洞试验/误差控制Key words
rarefied regime/skin friction balance/smooth wall surface/drag reduction/wind tunnel test/error controll分类
航空航天引用本文复制引用
刘春风,何啸天,苗文博,王雪枫,程晓丽..稀薄流区的摩阻测量技术及减阻试验[J].航空学报,2025,46(12):85-96,12.基金项目
国家级项目 National Level Project （）
