激波管驱动石英砂颗粒抛洒的数值模拟

Numerical Simulation of Quartz Sand Dispersion under Shock Tube Loading

为了研究激波驱动下固体颗粒的抛洒问题，采用FLUENT的离散相模型，对不同直径（2．00～3．00mm、0．80～1．10mm和0．42mm）、质量均为5g的石英砂颗粒在激波管加载下抛洒的气一固两相流动过程进行了数值模拟，得到了石英砂颗粒云团的中心颗粒在抛洒过程中不同时刻沿激波加载方向的平均速度和平均位移，并与实验结果进行了对比。结果表明，两者的吻合度较好，只是由于计算模型中未考虑滤网，并且假定激波管纸膜为瞬间破裂，因此导致数值模拟得到的平均速度和平均位移略高于实验值。

In order simulation of the to di study spersl the dispersion of solid particle under the loading of shock tube,a numerical on of quartz sand with a mass of 5 g and different diameters of 2. 00-3.00 mm,0. 80-1. 10 mm and 0. 42 mm respectively was carried out by means of DPM （dispersion phase model） of FLUENT. For the particles in the center of the quartz sand cloud during the disper-sion,the average velocity and the average displacement along the loading direction were obtained. The numerical simulation results have a good agreement with the experimental results. Compared with the experimental results, the simulation result is slightly larger, probably because the dissipation energy on the sieve is ignored in the numerical simulation and the paper film of shock tube is considered to be ruptured instantaneously in the assumption.