A simplified energy dissipation based model of heat transfer for post-dryout flow boiling

被引：5

作者：

Mikielewicz, Jaroslaw ^{[1
]}

Mikielewicz, Dariusz ^{[2
]}

机构：

[1] Polish Acad Sci, Inst Fluid Flow Machinery, Ul Fiszera 14, PL-80231 Gdansk, Poland

[2] Gdansk Univ Technol, Fac Mech Engn, Ul Narutowicza 11-12, PL-80233 Gdansk, Poland

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2018年 / 124卷

关键词：

Post dryout; Mist flow; Modeling; HORIZONTAL TUBES;

D O I：

10.1016/j.ijheatmasstransfer.2018.03.063

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A model for post dryout mist flow heat transfer is presented based on considerations of energy dissipation in the flow. The model is an extension of authors own model developed earlier for saturated and sub cooled flow boiling. In the former version of the model the heat transfer coefficient for the liquid single-phase convection as a reference was used, due to the lack of the appropriate model for heat transfer coefficient for the mist flow boiling. That issue was a fundamental weakness of the former approach. The purpose of present investigation is to fulfil this drawback. Now the reference heat transfer coefficient for the saturated flow boiling is that corresponding to vapour flow the end of the mist flow. The wall heat flux is based on partitioning and constitutes of two principal components, namely the convective heat flux for vapour flowing close to the wall and two phase flow droplet-vapour in the core flowing. Both terms are accordingly modelled. The results of calculations have been compared with some experimental correlations from literature showing a good consistency. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：260 / 268

页数：9

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