Errors in hot-wire X-probe measurements induced by unsteady velocity gradients

被引：6

作者：

Fransson, JHM ^{[1
]}

Westin, KJA ^{[1
]}

机构：

[1] KTH, Dept Mech, S-10044 Stockholm, Sweden

来源：

EXPERIMENTS IN FLUIDS | 2002年 / 32卷 / 03期

关键词：

D O I：

10.1007/S003480100360

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 [机械工程];

摘要：

Errors in hot-wire X-probe measurements due to unsteady velocity gradients are investigated by a comparison of hot-wire and laser Doppler velocimetry (LDV) measurements. The studied flow case is a laminar boundary layer subjected to high levels of free-stream turbulence, and the hot-wire data shows a local maximum in the wall-normal fluctuation velocity inside the boundary layer. The observed maximum is in agreement with existing hot-wire data, but in conflict with the present LDV measurements as well as existing results from numerical simulations. An explanation for the measurement error is suggested in the paper.

引用

页码：413 / 415

页数：3

共 12 条

[1]

Optimal disturbances and bypass transition in boundary layers [J].