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首页> 外文会议>14th International Conference on Nuclear Engineering 2006(ICONE14) vol.2: Thermal Hydraulics >NUMERICAL AND EXPERIMENTAL INVESTIGATION OF STRATIFIED GAS-LIQUID TWO-PHASE FLOW IN HORIZONTAL CIRCULAR PIPES
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NUMERICAL AND EXPERIMENTAL INVESTIGATION OF STRATIFIED GAS-LIQUID TWO-PHASE FLOW IN HORIZONTAL CIRCULAR PIPES

机译：水平圆管内分层气液两相流动的数值和实验研究

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摘要

This paper reports numerical and experimental investigation of stratified gas-liquid two-phase flow in horizontal circular pipes. The Reynolds averaged Navier Stokes equations (RANS) with the κ-ω model for a fully developed stratified gas-liquid two-phase flow are solved by using the finite element method. A smooth and horizontal interface surface is assumed without considering the interfacial waves. The continuity of the shear stress across the interface is enforced with the continuity of the velocity being automatically satisfied by the variational formulation. For each given interface position and longitudinal pressure gradient, an inner iteration loop runs to solve the nonlinear equations. The Newton-Raphson scheme is used to solve the transcendental equations by an outer iteration to determine the interface position and pressure gradient for a given pair of volumetric flow rates. The interface position in a 51.2 mm ID circular pipe was measured experimentally by the ultrasonic pulse-echo technique. The numerical results were also compared with experimental results in a 21 mm ID circular pipe reported by Masala. The good agreement between the numerical and experimental results indicates that the κ-ω model can be applied for the numerical simulation of stratified gas-liquid two-phase flow.
机译：本文报道了水平圆管中气液两相分层流动的数值和实验研究。采用有限元方法求解了完全展开的气液两相流的κ-ω模型的雷诺平均纳维斯托克斯方程（RANS）。在不考虑界面波的情况下，假定表面是光滑且水平的。通过变化公式自动满足速度的连续性，从而增强了跨界面的剪应力的连续性。对于每个给定的界面位置和纵向压力梯度，运行内部迭代循环来求解非线性方程。牛顿-拉夫森（Newton-Raphson）方案用于通过外部迭代求解先验方程，以确定给定的一对体积流量的界面位置和压力​​梯度。通过超声脉冲回波技术，通过实验测量了51.2 mm内径圆形管中的界面位置。还将数值结果与Masala报告的21 mm内径圆形管中的实验结果进行了比较。数值结果与实验结果吻合良好，表明κ-ω模型可用于气液两相分层流的数值模拟。

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