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结合三光束激光多普勒测速仪 ,从理论上分析了在不同介质中测量参数的修正 ,推导出LDA在不同介质中的参数修正公式。以空气和水两种不同介质为例 ,利用修正公式求出各自的参数 ,在二维流道上用LDA测量减阻流体的流速 ,将LDA与流量计的测量结果进行比较 ,结果令人满意。
Combined with the three-beam laser Doppler velocimeter, the correction of the measurement parameters in different media is theoretically analyzed, and the formula for the parameter correction of LDA in different media is deduced. Taking two different media of air and water as examples, the correction parameters were used to calculate their respective parameters. The flow velocity of the drag reducing fluid was measured by LDA on the two - dimensional flow channel. The results of LDA and flowmeter were compared and the results were satisfactory.