矩形双通道饱和沸腾传热特性试验研究

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矩形双通道饱和沸腾传热特性试验研究

更新时间：2025-07-09

- 矩形双通道饱和沸腾传热特性试验研究
- Issue 9, Pages: 141-151(2021)
- 作者机构：
  
  西安交通大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Published：2021
- 稿件说明：
移动端阅览
[J]. 2021, (9): 141-151.
DOI：

[J]. 2021, (9): 141-151. DOI：

摘要

针对船舰核反应堆内板式燃料狭窄通道间高温高压条件下沸腾传热问题

通过试验的方法对并联窄矩形通道内去离子水上升流动沸腾传热和流量分配规律展开了研究。设计了板式燃料电加热模拟体

制作了适用于高参数下的并联矩形窄缝通道流通结构

解决了高温高压下试验段密封、绝缘和热膨胀等问题。试验段本体为宽高比39.4的并联矩形通道

试验工况为入口压力2.1～10 MPa、入口温度80～299℃、质量流速1 000～1 500 kg/（m

·s）、热流密度100～300 kW/m

。结果表明:2毫米级窄缝矩形通道内单相传热特性与常规圆形通道内传热规律无明显差异;通道内工质沸腾后

热流密度成为沸腾传热主导因素

质量流速对换热特性影响减弱;从壁温、质量流速、热流密度和压力分析双通道传热特性差异

发现相同工况条件下双通道相同位置传热系数偏差不超过±7%

从传热角度看两个并联矩形通道流量分配趋于均匀;将试验数据与5个现存沸腾传热关联式进行了对比

并以Kim公式为基础对关联式进行了改进

拟合得到一个新关联式

改进后的关联式与试验数据吻合良好

分别有77.1%、96.4%的预测值与试验值偏差在±10%、±20%范围内。

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references

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