垂直布置倒U型管内汽液两相流稳态特性及脉动特性研究

本试验以Ｆｒｅｏｎ－１１３为工质，从试验和理论两方面研究了垂直布置倒Ｕ型管内汽液两相流的稳态，脉动曲线。试验范围如下：出口压力ｐｅ＝０．２￣０．４ＭＰａ，系统加热功率Ｑ＝６．４￣１０．４ｋＷ，质量流速ｍ＝３￣２４ｋｇ／ｍｉｎ，理论研究采用一维均相模型，用差分法求解守恒方程组，得到稳态的流量－差压特性曲线，同时还采用数值计算方法模拟了压力降型脉动曲线。

A Study of the Steam/Liquid Dual phase Flow Steady State and Pulsation Characteristics in a Vertically Placed and Inverted U Shaped Pipe

With Freon-113 serving as a working medium the steady state and pulsation curves of steam/liquid dual phase flow in a vertically placed inverted U shaped tube is studied from both the experimental and theoretical aspects. The test range can be given as follows:outlet pressure P e=0.2-0.4 MPa, system heating power output Q=6.4-10.4 kW, mass flow speed m =3-24 kg/m. For the theroetical study adopted is a one dimensional uniform phase model with a difference method used for solving a group of conservation equations. Obtained are the steady state flow ratedifferential pressure characteristics curves. Moreover, a numerical calculation method has been used to simulate pressure drop type pulsation curves.