Drag reduction of engine exhaust system based on spray cooling

被引：0

作者：

Zhang C.-C. ^{[1
,2
]}

Xin Z.-T. ^{[1
,2
]}

Yu H. ^{[3
]}

Wu Y.-F. ^{[4
]}

Sun X.-W. ^{[1
,2
]}

Du T.-Y. ^{[1
,2
]}

机构：

[1] Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun

[2] Weihai Institute for Bionics, Jilin University, Weihai

[3] WeiHai Science and Technology Innovation and Development Center, Weihai

[4] China North Vehicle Research Institute, Bejing

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2024年 / 54卷 / 03期

关键词：

drag reduction; exhaust system; fluid mechanics; spray cooling;

D O I：

10.13229/j.cnki.jdxbgxb.20220563

中图分类号：

学科分类号：

摘要：

The electric heating spray cooling drag reduction test bench was used to systematically study the influence of spray flow rate，spray inclination angle，airflow temperature，and airflow speed on the drag reduction performance of the engine exhaust system. The reason why spray cooling can significantly reduce drag was revealed by DPM-based numerical simulation. The research results show that the drag reduction rate increases with the spray flow rate when the spray flow rate is between 12 mL/s and 24 mL/s. When the spray inclination angle is increased from 45° to 90°，the drag reduction first remains unchanged and then decreases. The drag reduction effect of 45° and 60° spray inclination is the best. When the airflow temperature is between 200 ℃ and 300 ℃，the drag reduction rate increases with the airflow temperature. The drag reduction rate decreases gradually when the airflow velocity increases from 20 m/s to 30 m/s. The reason for the significant reduction in the drag of the exhaust system after spraying is that the airflow velocity reduces，the turbulent intensity reduces，and the local and frictional drag reduces. © 2024 Editorial Board of Jilin University. All rights reserved.

引用

页码：641 / 649

页数：8

共 24 条

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