多普勒激光测速仪在轴流风扇流场测量中的应用

Measurement of Flow Field in the Rotor of an Axial Flow Fan by Laser Doppler Anemometer

介绍了多普勒激光测速仪在风扇转子流场测量中的一些基本方法，说明采用频谱分析法要比目前使用较多的计数法多普勒激光测速仪有更多的优越性，利用ＢＳＡＤＡＮＴＥＣ频谱测量系统实测了转子叶尖附近的流场，并获得了一些重要的流场信息。

A method of using the laser Doppler anemometer to measure the flow field in the rotor of an axial flow fan is described in this paper. A laser anemometer was used to map blade to blade velocity in the tip region of the rotor and some important results were obtained. The fact that FFT processing systems permit an acquisition of signals with low SNR indicates that frequency analyzers with FFT processor are superior to the counters still commonly used at present.