Intensification of Heat Transfer in Heat Exchangers with Diffuser Channels

被引：1
|
作者：
Reshmin, A. I. [1 ]
Lushchik, V. G. [1 ]
Makarova, M. S. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Inst Mech, Moscow 119192, Russia
来源：
FLUID DYNAMICS | 2024年 / 59卷 / 04期
关键词：
heat exchanger; diffuser channel; RANS turbulence model;
D O I：
10.1134/S0015462824602766
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The results of studies on the intensification of heat transfer in round and flat continuous diffusers for a number of diffusers' opening angles are presented. Numerical modeling of heat transfer is carried out using a three-parameter differential RANS turbulence model supplemented with a transfer equation for a turbulent heat flow. It is shown that at the same opening angle in a round diffuser, the friction coefficient, Nusselt number, and turbulence intensity are significantly higher than in a flat diffuser, and these excesses increase with an increase in the opening angle. The possibility of using diffuser channels in plate and round pipe-in-pipe heat exchangers is considered.
引用
收藏
页码：987 / 995
页数：9
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