カウンタタイプ信号処理器を用いたLDVによる乱れ速度測定誤差について

抄録

Cycle-to-cycle variations in the time period of a Doppler signal cycle on which higher frequency noise is superimposed give rise to velocity turbulence errors in a commercially available counter processor. The errors simulated and measured by the dual-beam LDV are found to increase in lower turbulent flows at lower count-cycle numbers and higher shift frequencies. The measured turbulence was corrected to some extent by the simulation described in this study.