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气固两相等温自由射流的研究对改善煤粉喷射燃烧效率,提高燃料利用率具有重要意义。为测量两相等温自由射流中颗粒相的速度场,作者根据Mie散射理论设计建立了一套激光角散射测速装置,并用该装置在气固两相流试验台上进行了颗粒运动速度的测量。试验物料采用氧化铝粉末,筛分范围为48～153μm。实测结果与毕托管测得的单相气流速度分布进行了比较,两者相吻合。可以预期在结构工艺上加以完善即可用于生产过程。
The study of free gas-solid two-phase isothermal jet is of great significance to improve the combustion efficiency of pulverized coal injection and improve the fuel utilization efficiency. In order to measure the velocity field of the particle phase in a two-phase free-jet with a constant temperature, a set of laser angle-scattering velocity-measuring device was designed based on the Mie scattering theory. The particle velocity was measured on a gas-solid two-phase flow test rig using this device. Test materials using alumina powder, screening range of 48 ~ 153μm. The measured results are compared with the single-phase airflow velocity distributions measured by the Biotope, which coincide with each other. Can be expected to improve the structural process can be used for the production process.