洞塞式消能工的数值计算

Numerical Simulation of Throat-type Energy-dissipators

采用K-ε紊流模型对洞塞消能紊流场进行了数值模拟 ,并与模型试验进行了对比 ,压力分布计算值与试验结果吻合良好。通过数值模拟 ,得出了洞塞消能的紊动能和紊动能耗散率的分布规律 ,详细地反映出洞塞的消能情况。研究表明 :用K-ε紊流模型来研究突缩突扩消能的流场是可行的 ,可以很好地发挥与物理模型相互补充、印证 ,深入揭示内部机理的作用。

The flow field is calculated in this paper by using an axis symmetrical K-ε turbulence model. The calculated pressure distribution is compared with the measured results. The distributions of turbulent energy and its energy dissipation rate are acquired, the energy dissipation through the throat type energy dissipators can be seen in detail. The numerical simulation shows that K-ε model is suitable to simulate the turbulent flow with abrupt reduction and abrupt expansion. It can be used to complement and verify the experimental results in physical model, and reveal deeply the interior mechanism of the flow field.