气固两相流动的LDV测试技术研究与实施

Study on LDV measurement technology of gas solid two phase flow.

介绍了气固两相流动的ＬＤＶ测试方法和有关技术。并对方管内网栅后气固两相流动进行了测量，固相颗粒平均粒径Ｄｐ＝９００μｍ，颗粒质量分数α＝０．２０５％、０．３０％。试验给出了管内不同断面上气流及颗粒速度分布情况，通过与纯气流条件下的试验结果比较，分析了不同质量分数的颗粒对气流速度结构的影响，并对同样条件下的颗粒与气流速度分布进行了比较。

The LDV measurement method and technology concerned of gas solid two phase flow were presented,and the gas solid two phase flow behind the screen in a square duct was measured.In the conditions of the average diameter of solid particles d p=900*$μm,the percentage of the particle mass, α= 0.205% or 0.30%, the distributions of the gas flow speed and the particle flow speed at the various sections in the square duct were given with tests.The influences of the particles with various mass percentages on the structure of the gas flow speed were analysed through the comparison of a test result only in the gas condition,and a comparison of the distributions of the particle flow speed and the gas flow speed in the same condition was made.