EXPERIMENTAL TESTING OF TAYLOR HYPOTHESIS BY LDA IN HIGHLY TURBULENT-FLOW

被引：40

作者：

CENEDESE, A ^{[1
]}

ROMANO, GP ^{[1
]}

DEFELICE, F ^{[1
]}

机构：

[1] ITALIAN AEROSP RES CTR,I-81043 CAPUA,ITALY

来源：

EXPERIMENTS IN FLUIDS | 1991年 / 11卷 / 06期

关键词：

D O I：

10.1007/BF00211789

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A new configuration for the transmitting optics of a laser Doppler anemometer has been developed in order to measure the velocity at two different points at the same time. From the simultaneous measurements at two points along the mean flow direction it is possible to evaluate the spatial correlations and to compare them with the temporal correlation to verify the validity limits of Taylor's hypothesis also known as the frozen turbulence hypothesis. The transfer function between the velocity signals at two different points has been introduced to better explain the differences between Taylor's hypothesis and non frozen flow. The analysis is carried out in a flow with high turbulence levels.

引用

页码：351 / 358

页数：8