沙粒在复合型阻沙措施附近沉积特性数值模拟

Numerical Simulation on Sand Deposition Characteristics Around Composite Sand Barrier Measures

基于CFD软件,采用DPM模型对沙粒在复合型阻沙措施(阻沙堤与截沙沟组合而成)附近的运动轨迹和沉积特性进行了数值模拟。结果表明:阻沙堤对大粒径的沙粒拦截效果良好,大部分小粒径沙粒将越过阻沙堤顶部继续输运;在阻沙堤下风向气流(或沙粒)的附着点后增设截沙沟措施可显著提高对沙粒的拦截效率;阻沙堤与截沙沟间间距固定的情况下,增大截沙沟长度对促进沙粒沉积有显著影响。

The sand trajectory and deposition characteristics around composite sand barrier measures(combination sand preventing dike with sand preventing ditch) were simulated by the discrete particle model based on the CFD software.The results showed that the effect of the sand preventing dike obstructed larger particles was better and the majority of the smaller particles transported across its top continuously;The obstructive effect was improved obviously by setting up the sand preventing ditch behind the airflow's(or sand particles) touch point in the downstream of the sand preventing dike;While the distance between the sand preventing dike and the sand preventing ditch was a constant,expanding the length of the sand preventing ditch affected the sand deposition observably.