Open AccessStudy on the Influence of Tube Curvature on Heat Transfer Characteristics of High Efficiency Air Pre-cooler
Author(s) -
Zhiqiang Cao,
Chunan Ai,
Xueren Wang,
Jian Li
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/677/3/032067
Subject(s) - curvature , heat transfer , mechanics , tube (container) , materials science , convective heat transfer , flow (mathematics) , heat transfer enhancement , convection , thermodynamics , heat transfer coefficient , composite material , mathematics , geometry , physics
High-efficiency pre-cooler is one of the key components of RBCC combined engine. To explore the influence of tube row curvature on heat transfer, a convection heat transfer simulation of pre-cooler composed of different curvature tube rows is established. The model and numerical calculations show that when the curvature is small, the heat transfer efficiency increase slowly with curvature increasing, but the flow resistance increase obviously by increasing curvature. However, when the curvature is large, the effect of curvature increasing on the heat transfer efficiency is obvious and the increase of flow resistance get slower. Based on this, a ring pre-cooler is designed and the heat transfer effect is simulated. It has reference application value for the design of high efficiency pre-cooler.