Effect of validation procedure on step noise amplitude in LDV spectra evaluation

被引：3
作者：
Coghe, A
Cossali, GE
机构：
[1] Politecn Milan, Dipartimento Energet, I-20133 Milan, Italy
[2] Univ Bergamo, I-24044 Dalmine, BG, Italy
来源：
EXPERIMENTS IN FLUIDS | 1998年 / 24卷 / 5-6期
关键词：
D O I：
10.1007/s003480050187
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The evaluation of turbulence power spectra from velocity data acquired by LDA is considered. An analysis of the effect of the validation procedure, implemented in many data processors, on the power spectrum obtained by the sample and hold method is reported and compared to experimental results. The existence of a new term in the measured power spectrum step noise is predicted and experimentally verified and a procedure for eliminating spectral bias and estimating the Taylor time scale is suggested and applied.
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页码：382 / 388
页数：7
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