Numerical investigation of the enhanced heat transfer characteristics in dimpled enhanced tube to shell-and-tube lube oil heat exchangers

被引：2

作者：

Li, Yang ^{[1
]}

Li, Nianqi ^{[1
]}

Zeng, Min ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab Thermofluid Sci & Engn, Xian 710049, Shaanxi, Peoples R China

来源：

CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY | 2025年 / 27卷 / 04期

关键词：

Dimpled enhanced tube; Enhanced heat transfer; Numerical simulation; Disk-and-doughnut baffles; Shell-and-tube heat exchanger; THERMAL-HYDRAULIC PERFORMANCE; FLOW;

D O I：

10.1007/s10098-024-02994-w

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The lubricating oil heat exchanger plays a critical role in the lubricating oil system of an aero-engine. In order to enhance its heat transfer efficiency, a novel design featuring a shell-and-tube heat exchanger with disk-and-doughnut baffles and spiral dimple tubes (SDDD-STHX) is designed. Computational fluid dynamics is employed to compare this innovative design with the traditional smooth tube heat exchanger (STDD-STHX). The computational results reveal that the SDDD-STHX exhibits an approximately 11% lower average shell-side pressure drop compared to the STDD-STHX. Moreover, the tube-side heat transfer coefficient of the SDDD-STHX is about 12% higher than that of the STDD-STHX. Furthermore, across a range of inlet mass flow rates from 0.4 to 1.5 kg/s, it is observed that the SDDD-STHX demonstrates an approximately 7.6% higher heat transfer coefficient per unit pressure drop in its shell section when compared to the STDD-STHX.

引用

页码：1809 / 1823

页数：15