摘要
提出了一种基于漂移流模型的适用于倾斜管道和垂直管道的两相流模型。这个模型有别于其他模型(Ansari1994,Xiao1990,Zhang2003)用非线性方程求解整个系统压力梯度,而是用一个相对简单明确的方程来计算压力梯度,从而减少了计算时间。漂移流模型可以较精确地计算气泡流压力降,但是对于段塞流,一般都会低估含气率,从而导致高估了压力降;为了精确计算段塞流压力降,即使气泡含量少也需考虑,可用含气率表示气泡含量,它与压力降有密切关系。
A new model for two-phase flow in inclined or vertical pipeline is proposed on the basis of the drift-flux approach. The proposed model, unlike the other models that incorporate a system of nonlinear equations to solve pressure-gradient, uses a simpler explicit equation to solve pressure-gradient, thus reducing computation time significantly. The drift-flux approach can calculate the pressure drop of bubbly flow quite accurately. However, for slug flow, it usually underestimates the gas-bearing ratio, leading to the pressure drop being overestimated significantly. In order to get more precise result of slug flow pressure drop, even a small amount of gas bubbles in slug flow should be accounted for, it can be represented by the gas-bearing ratio that is closely related to pressure drop.
出处
《石油工程建设》
2013年第1期9-11,87,共3页
Petroleum Engineering Construction
关键词
倾斜混输管道
段塞流
含气率
压力梯度
漂移流模型
inclined gas-liquid pipeline
slug flow
gas-bearing ratio
pressure-gradient
drift-flux model
