矩形通道内蒸汽射流凝结换热面积的实验研究

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矩形通道内蒸汽射流凝结换热面积的实验研究

更新时间：2025-07-09

- 矩形通道内蒸汽射流凝结换热面积的实验研究
- Issue 7, Pages: 46-51(2018)
- 作者机构：
  
  1. 西安交通大学热流科学与工程教育部重点实验室
  2. 中国船舶重工集团公司第705研究所
  3. 西安交通大学动力工程多相流国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： O358
- Published：2018
- 稿件说明：
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[J]. 2018, (7): 46-51.
DOI：

[J]. 2018, (7): 46-51. DOI：

摘要

针对超声速气液两相流升压装置内高速蒸汽射流凝结现象

在蒸汽质量流率为200～600kg·m-2·s-1、入口过冷水质量流率为4～18t·m-2·s-1、入口过冷水温度为20～50℃的条件下

使用矩形截面蒸汽喷嘴和混合腔进行了可视化实验研究;采用热平衡相变模型计算了蒸汽射流凝结的换热面积

给出了换热面积随汽水参数的变化规律

并建立了预测归一化换热面积的实验关联式。研究结果表明:蒸汽喷嘴截面形状对射流凝结流场结构影响不大

气液两相区是蒸汽凝结的主要区域

蒸汽在气液两相区内以小气泡的形式与过冷水完成能量交换

换热面积随蒸汽质量流率和过冷水温度的增加而增加

随过冷水质量流率的增加而减小。实验中测得的换热面积在2.4×10-3～7.8×10-3 m2之间

换热面积实验关联式预测值与实验值的误差在±10%以内。本文研究结果对超声速气液两相流升压装置的优化设计和安全运行具有重要意义。

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references

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