关键词: 含气率, 改进模型, 水平管, 气液两相流

Abstract: In consideration of the bubble in the film of annular flow and the droplet in the gas core, the previous model of Smith has been modified in order to predict the void fraction in horizontal pipes more accurately. During the gas quality range of 0.048 5~0.796 0, as to Smith model, the void fraction prediction error of stratified flow and annular flow was 29.2% and 18.6% respectively. On the contrary, as to stratified flow, the corresponding prediction error of the modified model was 10.89% and in annular flow the prediction error was 13.3%. The experimental results showed that the prediction accuracy was improved greatly compared with Smith model.

Key words: Void fraction,    , Modified model,    ,  Horizontal pipe,   , Gasliquid twophase flow