论文部分内容阅读
为研究横流中气固两相射流的穿透性和扩展宽度,采用数值模拟方法研究了射流速度比率为2.68,颗粒与气流质量流率比为5～15的横流中圆管气固两相射流。基于射流直径的雷诺数为14047,基于颗粒直径的最大雷诺数为45.6。模拟结果获得的射流中心轨迹以及射流扩展宽度与试验结果基本一致。另外,数值模拟结果揭示了射流近场的颗粒弥散规律,同时发现越大的颗粒与空气质量流率之比能获得越深的射流穿透度和更大的射流扩展宽度。
In order to study the permeability and expansion width of gas-solid two-phase jets in cross-flow, a numerical simulation was performed to study the gas-solid two-phase jets in cross-flow with a jet velocity ratio of 2.68 and a mass flow rate ratio of particles to air flow of 5-15 . The Reynolds number based on the jet diameter is 14047 and the maximum Reynolds number based on the particle diameter is 45.6. The center of the jet obtained from the simulation results and the width of the jet are basically consistent with the experimental results. In addition, the results of numerical simulation revealed the particle dispersion law in the near-field of the jet, and found that the larger the ratio of the particles to the air mass flow rate, the deeper the jet penetration and the larger jet expansion width.