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动载下水平管内流动水沸腾两相流型实验研究

发表时间:2009-05-31  浏览量:1731  下载量:841
全部作者: 姚秋萍,宋保银,赵枚
作者单位: 南京航空航天大学航空宇航学院
摘 要: 自主搭建了动载沸腾汽-水两相流实验装置,进行了两相流系统在静止和旋转状态的流型实验,获得了同一加热条件下,转台在0~57 r/min(测试段中心截面所受过载量为0~2g)加速旋转过程中和57 r/min~0(测试段中心截面所受过载量为2g~0)减速旋转过程中管内流动水沸腾两相流型的典型图片。发现并定义了新的流型:冲击流、高冲击交混流和低冲击交混流。考察了重力和离心力对气泡和沸腾流型的影响,并从管内流体质点受力角度,分析了造成加速、减速过程中流型变迁非对称现象的原因。
关 键 词: 航空、航天科学技术基础学科;汽-水两相流;动载;水平管;沸腾;流型
Title: Experimental research on two-phase flow pattern of boiling water flowing in a horizontal pipe under Hi-G condition
Author: YAO Qiuping, SONG Baoyin, ZHAO Mei
Organization: College of Aerospace of Man-Machine Engineering, Nanjing University of Aeronautics and Astronautics
Abstract: The experiment for investigating steam-water two-phase flow patterns under high gravity (Hi-G) condition was conducted on a self built rotational platform, on which a steam-water two-phase flow system was installed. The typical photos of two-phase flow pattern of boiling water flowing in a pipe were obtained under the same heating condition during increasing the platform’s rotational speed from 0 to 57 r/min (i.e. the change of dynamic load at middle section of test pipe is from 0 to 2 times of acceleration of gravity) and decreasing the speed from 57 r/min to 0 (i.e. the change of dynamic load at middle section of test pipe is from 2 times to 0 of acceleration). The new flow patterns were found and defined as impact flow, high impact mixing flow and low impact mixing flow. The effects of gravity and centrifugal force on bubble and boiling flow patterns were investigated. The reason for the asymmetrical phenomena of flow pattern transition in acceleration and deceleration processes was analyzed from the point of view of the forces exerted on the fluid particles in the pipe.
Key words: basic subject of aeronautics and astronautics science and technology; steam-water two-phase flow; high gravity; horizontal pipe; boiling; flow pattern
发表期数: 2009年5月第10期
引用格式: 姚秋萍,宋保银,赵枚. 动载下水平管内流动水沸腾两相流型实验研究[J]. 中国科技论文在线精品论文,2009,2(10):1111-1116.
 
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