二维激光多普勒测速仪在扩散火焰测量中的应用

利用二维激光多普勒测速仪测量了液化石油气-空气扩散火焰的流场,得到了满意的结果。测量采取前向散射接收方式,为此对原后向散射接收光路进行了改造,结果在激光输出功率较低的情况下得到了比较好的多普勒信号。 

APPLICATION OF A TWO-DIMENSIONAL LASERDOPPLER ANEMOMETER TO MEASUREMENTIN DIFFUSION FLAME

The flow field of liquified petroleum gas (LPG) -air diffusion flame in a small scale combustion system was measured with a two-dimensional laser Doppler anemometer(LDA). In order to reduce loss of laser output the forward scatter receiving mode was employed.For this reason, the back scatter receiving optical system of two-dimensional LDA from DANTEC company was modified. The practice shows that the forward scatter receiving mode reduces the loss of laser output by a factor of 2 or more,the Doppler signals received are satisfactory.A self-made solid particle generator was used to increase data rate. Solid particles of magnesium dioxide were chosen as scattering particles. The tests verify that this approach is suitable for LDA measurement.