液柱分離を伴う水平管路の水撃現象に対する離散形空洞モデルの検討

概要

論文の詳細を見る
As an effective computational model, a vaporous cavity model, an air release model and a discrete free gas model have been developed to simulate transient cavity flows. In this report, the validity of these models is reexamined by employing a prototype horizontal pipeline with or without elevation points. In the vaporous cavity model and the discrete free gas model, fairly good results are obtained for the case of low void fraction becouse numerical instability appears to be small in the pressure responses using the characteristics method with linear interpolations. The air release model represents satisfactory results in the case of a relatively large void fraction, however such a model includes some unpredictable parameters and requires a more complicated algorithm than the other two models to get a solution. all the models discussed here are able to predict the maximum pressure profile along the pipeline for transient cavity flows up to at least 3% of void fraction.
社団法人日本機械学会の論文
1989-05-25