管道增输器的数值模拟与现场试验

理论分析和实验表明壁面振动能减小管道的摩擦阻力。文中对笔者发明和研制成功的管道增输器的工作原理、数值模拟和现场试验进行了介绍。现场试验表明:管道增输器不仅降低了管道摩擦阻力,而且能增大天然气管网的输气量。数值模拟也表明:在碰撞壁处产生的压力扰动波在诱发涡量脉动的同时,又与大结构涡环的径向分量对振荡腔的壁面发生作用,引起壁面振动,振荡腔是形成脉冲流的主要部件。

Numerical simulation and on-site test of an increasing pipe gas delivery capacity device

The theoretical analysis and experiment show that the wall oscillation can reduce the friction drag of the pipe. The operation mechanism, on-site test and numerical simulation of the Increasing Gas Delivery Capacity Device for the Pipe (IGDCDP) invented by the author are introduced in the paper. The on-site test shows that the IGDCDP can not only reduce the friction drag, but also enhance the gas delivery capacity obviously in the natural gas network. The numerical simulation results show that at the time of inducing some new vortex disturbance waves, the pressure pulse wave generated from the impinging edge has an effect on the oscillation cavity wall to cause oscillation with the large structured vortex rings, so the oscillation cavity is the main component that generating the pulsed jet.