摘要
以无迎角平板作为模型,用多片表面热膜作为测量元件,在低速风洞中测定边界层转捩位置及其随来流速度变化的规律,并在等精度重复测量的基础上给出边界层转捩特征点位置测量的精度。实验研究的结果表明,本文提出的测定边界层转捩位置及其变化规律的实验技术,能够满足应用性定量实验的需要。
An experimental study was performed to locate boundarylayer transition and predict its relation to air stream velocity.Theexperiments were carried out in a low speed wind tunnel.The multi-piece of surface hot film gages on the surface of a flat plate gavethe RMS values of fluctuating electric voltage.The characteristicpoint of boundary layer transition was located from these results.Theprecision of measurement was obtained from repeated tests.The resultsshow that this experimental technique can fulfill the requirementsof practical quantitative measurements.
基金
航空科学基金
关键词
边界层转捩
测量
表面热膜技术
boundary layer transition
measurement
surface hot film gage
