蒸汽加热窄矩形通道内完全沸腾起始点研究
Onset of fully developed boiling in steam-heated narrow rectangular channel
顾晟杰 1陶乐仁 2金程 1赵谢飞 1居一伟1
作者信息
- 1. 上海理工大学能源与动力工程学院,上海 200093
- 2. 上海理工大学能源与动力工程学院,上海 200093;上海市动力工程多相流动与传热重点实验室,上海 200093
- 折叠
摘要
以去离子水为工质,对尺寸为1 400 mm × 250 mm × 3.5 mm(高×宽×深)的蒸汽加热竖直矩形窄通道内完全沸腾起始点进行实验研究,并对气泡脱离直径构建预测模型.分析入口温度、质量流量以及加热蒸汽流量对完全沸腾起始点位置及对应位置处壁面过热度的影响.基于Hata、Mcadams的公式模型提出实验工况范围内蒸汽加热竖直窄矩形通道的完全沸腾起始点过热度的预测关联式,其平均相对误差为6.11％;采用力学方法对加热壁面附壁气泡进行力学分析,构建基于受力平衡的气泡脱离直径预测模型,采用可视化实验进行验证,其平均相对误差为 13.37％.
Abstract
Using deionized water as the working fluid,onset of FDB(fully developed boiling)in a steam-heated vertical narrow rectangular channel with dimensions of 1 400 mm × 250 mm × 3.5 mm(height × width × depth)was experimentally investigated,and a prediction model was built for the bubble departure.The effects of inlet temperature,mass flow rate and heating steam flow rate on the location of FDB and the wall superheat at the corresponding location were analyzed.Based on the formula model proposed by Hata and Mcadams,a correlation formula for predicting the superheat at FDB of a vertical narrow rectangular channel heated by steam within the range of experimental conditions was proposed.Its average relative error is 6.11％.Through the mechanical analysis of the bubble attached to the heated wall,the prediction model of bubble departure diameter based on the force balance was established and was verified by visual experiment.The average relative error is 13.37％.
关键词
窄通道/完全沸腾起始点/壁面过热度/气泡脱离直径Key words
narrow channel/FDB/wall superheat/bubble departure diameter引用本文复制引用
基金项目
上海市动力工程多相流动与传热重点实验室研究项目(2019KJFZ201)
出版年
2024
国家科技期刊平台
NSTL
万方数据