段塞流液塞频率的波动特性  

FLUCTUATION CHARACTERISTIC OF LIQUID SLUG FREQUENCY FOR SLUG FLOW

作　　者：罗小明[1] 何利民[1] 吕宇玲[1] 

机构地区：[1]中国石油大学储运与建筑工程学院,山东青岛266555

出　　处：《工程热物理学报》2009年第2期253-256,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50676109)

摘　　要：段塞流的实际物理过程是复杂的随机过程,液塞频率也仅是以周期性来近似模拟段塞流的间歇性。本文对段塞流液塞频率的波动特性进行了深入研究。结果表明:随着折算气速的增加,液塞频率先减小然后增大,在折算气速增大的过程中液塞频率存在一个极小值。随着折算液速的增加,液塞频率急剧增大,折算液速是影响液塞频率的主要因素。在下倾管中,在折算气速相同的情况下,液塞频率是随下倾角的增大而降低的。这是因为随着下倾角的增大,重力作用增强,液塞消散增强。在上倾管中,在折算气速相同的情况下,液塞频率也随上倾角的增大而降低。The actual physical process of slug flow is a complex random process. It was only a kind of approximative simulation of slug flow intermittence by the way of periodicity of liquid slug frequency. In this paper, the fluctuation characteristic of slug frequency for slug flow was studied in depth. It was shown that： with the increasing of gas superficial velocity, the liquid slug frequency reduced firstly and then increased. In the process of increasing gas superficial velocity, there was a minimum value for the liquid slug frequency. With the increasing of liquid superficial velocity, which was the main factor that influenced liquid slug frequency, the liquid slug frequency increased dramatically. In the declination pipe, the slug frequency reduced with the increasing of obliquity at the same gas superficial velocity. This was because that the role of gravity enhanced with the increasing of obliquity and then the dissipation of liquid slug enhanced too. In the acclivity pipe, the slug frequency also reduced with the increasing of obliquity at the same gas superficial velocity.

关 键 词：多相流 段塞流 液塞频率 波动特性 

分 类 号：O359.1[理学—流体力学]