INFLUENCE OF THE MEASUREMENT VOLUME ON THE PHASE ERROR IN PHASE DOPPLER ANEMOMETRY .1. REFLECTIVE MODE-OPERATION

被引:8
作者
ALBRECHT, HE
BORYS, M
WENZEL, M
WRIEDT, T
机构
[1] INST WERKSTOFFTECH,D-28334 BREMEN,GERMANY
[2] UNIV ROSTOCK,FACHBEREICH ELEKTROTECH,INST ALLGEMEINE ELEKTROTECH,D-18051 ROSTOCK,GERMANY
关键词
D O I
10.1002/ppsc.19940110410
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In phase Doppler anemometry (PDA), phase difference errors are caused by the Gaussian intensity distribution of the laser beam and the curvature of the phase fronts outside of the beam waist. This results in erroneous particle sizes. Based on a physical analysis by geometrical optics [1], this phase difference error is evaluated for reflected mode operation (Part I) and for refracted mode operation (Part II). By varying the particle trajectories statistically, the error in determining the particle size and the mass flow can be simulated. By the method described the error in the measured phase difference can easily be estimated.
引用
收藏
页码:339 / 344
页数:6
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