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机构地区:[1]洛阳水利工程技术研究所
出 处:《流体力学实验与测量》1998年第1期63-67,共5页Experiments and Measurements in Fluid Mechanics
摘 要:在地下工程研究和设计中,地面运动的高速空气冲击波进入通道后的波动问题是非常重要和急待解决的问题。为了弄清激波进入通道后的传播规律,我们利用新近研制的光学激波管和其他激波管设备,对侧向激波进入通道后的各种模型进行了系统试验研究,观察了激波进入通道后的波动图像,获得了一些很有价值的成果。本文介绍了试验方法和设备,描述了地面激波进入通道后在口部的绕射、反射波动图像和波后多旋涡运动规律,定量给出了通道口部绕射区压力变化曲线。In the study and design of underground engineering,the problem of the wavemotion of the highspeed ground air shockwave after it enters the channel is very important and urgent.In order to clarify the propagation rules of the shockwave in the channel,we carried out a series of tests on plane shockwave propagation in channel model,using a set of newlydeveloped optical shocktube and other shocktubes,observed the shockwave flowing photographs,and gained many important results. In this paper,we will briefly introduce the test method and equipment,and analyze the flowing photographs of the deflection and reflection at the portal of the channel after the ground shockwave enters the channel.We will dlso describe in detail the forming and developing of the swirls behind the wave,and give the pressure curve at the channel portal.
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