哈尔滨工程大学学报2012，Vol.33Issue(6)：791-795,5.DOI:10.3969/j.issn.1006-7043.201107024
摇摆条件下窄通道内单相水流态转捩特性
Investigations on flow regime transition characteristics of single-phase water in narrow ducts under rolling conditions
摘要
Abstract
Narrow rectangular ducts have extensive application to a compact heat exchanger in which the single-phase flow regime transition behavior is influenced by rolling motion. Investigations on transition characteristics in the vicinity of a critical point from laminar to turbulent flow for single-phase water in narrow rectangular ducts with rolling motion were performed by flow resistance experiments and the technology of flow-trace display. The results show that the critical Reynolds number in the non-rolling condition has a value of nearly 25S0. Steady laminar flow and turbulent flow were observed under the rolling condition with a Reynolds number of less than 2400 and larger than 3500, respectively, in which the rolling motion has no significant effect on the flow regimes. In the transition region with the Reynolds number ranging from 2400 to 3500, the rolling motion has some influence on flow regimes 'transition. The flow regime transition occurs more easily as the rolling amplitude increases. Rolling period has nearly no effect on transition of flow regimes. Rolling motion changes the system gravitational pressure drop and induces an additional pressure drop, so its effect on single-phase flow regime transition cannot be ignored.关键词
摇摆运动/矩形窄通道/流态转捩/单相水/可视化Key words
rolling motion/ narrow rectangular ducts/ flow regime transition/ single-phase flow/ visual observation分类
能源科技引用本文复制引用
阎昌琪,幸奠川,曹夏昕,谢清清..摇摆条件下窄通道内单相水流态转捩特性[J].哈尔滨工程大学学报,2012,33(6):791-795,5.基金项目
国家自然科学基金资助项目(11175050,51076034). （11175050,51076034）
