螺旋管蒸发器工质流动换热建模及仿真

白 杰; 党建军; 李代金; 王晓欣

doi:10.11993/j.issn.1673-1948.2015.04.010

螺旋管蒸发器工质流动换热建模及仿真

doi: 10.11993/j.issn.1673-1948.2015.04.010

西北工业大学航海学院, 陕西西安, 710072

详细信息

作者简介:
白杰(1985-), 男, 在读博士, 主要研究方向为水下航行器动力技术.

中图分类号: TJ630.32; TK124
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- 被引次数: 0
出版历程
- 收稿日期: 2015-03-04
- 修回日期: 2015-04-28
- 刊出日期: 2015-08-20

Modeling and Simulation of Flow and Heat Transfer of Working Medium in Spiral Tube Evaporator

School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072, China

摘要

摘要: 为研究水下航行器螺旋管蒸发器在锅炉反应器中的性能, 建立了其稳态一维分布参数模型。通过将蒸发器沿管长划分成若干个单元, 采用数值计算方法, 对每个单元进行求解, 获得工质沿流动方向的状态参数。通过仿真试验, 分析了工质被加热至过热蒸汽的流动和换热过程, 对比分析了不同进口工质温度和流量下管内温度和压强的变化情况。仿真结果表明, 工质通过蒸发器产生的压损主要在两相区和气相区, 但相对工质自身高压, 压损较小; 提高进口工质温度可以增强换热性能, 提高出口蒸汽温度; 减少进口工质流量, 会增加出口蒸汽温度, 且增温作用显著。该数值计算模型可为水下航行器螺旋管的设计及其动力系统热力计算提供参考。
- 水下航行器 /
- 螺旋管 /
- 蒸发器 /
- 一维分布参数模型
Abstract: A steady state one-dimensional distributed parameter model of the spiral tube evaporator is built to study its property in the combustion reactor for an underwater vehicle. The evaporator is divided into many units along the tube to obtain the state parameters of the working medium along flow direction by the calculation of each unit. The flow and heat transfer processes during the working medium is heated to superheated steam are analyzed via simulation. The changes of the temperature and pressure in the tube are compared for different flow rate and temperature of the inlet working medium. Simulation results show that: the pressure loss during the medium passing through evaporator occurs mostly in two-phase area and vapor area, but the loss is small compared with the pressure of the medium itself; higher inlet temperature of the working medium improves the heat exchange performance and raise outlet vapor temperature; and reducing inlet flow rate significantly results in higher outlet vapor temperature. The proposed model may be applicable to spiral tube design and thermal calculation of power system for underwater vehicles.
- underwater vehicle /
- spiral tube /
- evaporator /
- one-dimensional distributed parameter model

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参考文献(8)

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