吉林大学学报(工学版) ›› 2024, Vol. 54 ›› Issue (3): 641-649.doi: 10.13229/j.cnki.jdxbgxb.20220563

• 车辆工程·机械工程 • 上一篇    

基于喷雾冷却的发动机排气系统减阻

张成春1,2(),辛振涛1,2,于海3(),吴玉峰4,孙潇伟1,2,杜天宇1,2   

  1. 1.吉林大学 工程仿生教育部重点实验室, 长春 130022
    2.吉林大学 威海仿生研究院, 山东 威海 264402
    3.威海市科技创新与发展中心, 山东 威海 264200
    4.中国北方车辆研究所, 北京 100086
  • 收稿日期:2022-05-12 出版日期:2024-03-01 发布日期:2024-04-18
  • 通讯作者: 于海 E-mail:jluzcc@jlu.edu.cn;whkjj@126.com
  • 作者简介:张成春（1976-），男，教授，博士.研究方向：仿生流动控制.E-mail：jluzcc@jlu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2018YFA0703300);国家自然科学基金项目(51875243)

Drag reduction of engine exhaust system based on spray cooling

Cheng-chun ZHANG1,2(),Zhen-tao XIN1,2,Hai YU3(),Yu-feng WU4,Xiao-wei SUN1,2,Tian-yu DU1,2   

  1. 1.Key Laboratory of Bionic Engineering，Ministry of Education，Jilin University，Changchun 130022，China
    2.Weihai Institute for Bionics，Jilin University，Weihai 264402，China
    3.WeiHai Science and Technology Innovation and Development Center，Weihai 264200，China
    4.China North Vehicle Research Institute，Bejing 100086，China
  • Received:2022-05-12 Online:2024-03-01 Published:2024-04-18
  • Contact: Hai YU E-mail:jluzcc@jlu.edu.cn;whkjj@126.com

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摘要：

采用电加热喷雾冷却减阻试验台，系统研究了喷雾流量、喷雾倾角、气流温度、气流速度影响发动机排气系统减阻性能的规律；采用基于离散相模型（DPM）的数值模拟，阐释了喷雾冷却大幅降低排气阻力的原因。研究结果表明：喷雾流量为12~24 mL/s时，减阻率随喷雾流量的增加而增大；喷雾倾角由45°增加至90°时，减阻率先保持不变后减小，45°和60°喷雾倾角时的减阻效果均为最佳；气流温度为200~300 ℃时，随着气流温度的升高，减阻率呈增大趋势；气流速度由20 m/s增大至30 m/s时，减阻率逐渐下降。排气系统喷雾后阻力大幅度减小的原因是喷雾后气流速度降低，湍流强度降低，局部阻力和摩擦阻力显著减小。

关键词: 流体力学, 排气系统, 喷雾冷却, 减阻

Abstract:

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.

Key words: fluid mechanics, exhaust system, spray cooling, drag reduction

中图分类号: 

  • V228.7

图1

喷雾减阻试验台"

图2

试验台组成子系统"

图3

喷雾示意图"

表1

影响因素水平具体数值"

水平因素
喷雾流量/（mL·s-1）喷雾倾角/（°）气流速度/（m·s-1）

气流温度/

℃

1124520200
2186025250
3247530300
4-90--

图4

喷雾过程排气系统阻力及出口温度随时间变化"

图5

气流温度为200 ℃时不同流速条件下喷雾流量以及喷雾倾角对排气系统减阻的影响"

图6

气流温度为250 ℃时不同流速条件下喷雾流量以及喷雾倾角对排气系统减阻的影响"

图7

气流温度300 ℃时不同流速条件下喷雾流量以及喷雾倾角对排气系统减阻的影响"

图8

计算域模型"

图9

计算域网格"

表2

不同尺度网格计算结果"

网格数量/万计算结果/Pa结果变化量/%
1606403
4816221
744628-

图10

喷雾后排气系统温度分布云图"

图11

排气系统静压分布云图"

图12

湍动能分布云图"

图13

壁面剪切力云图"

1 Ma Ze-tai, Gu Yun-cheng, Zhu Si-peng, et al. Analysis on capability of power recovery of marine diesel engine at high backpressure conditions[J]. Applied Thermal Engineering, 2022, 204: No. 117933.
2 Ebrahimnataj M R, Tiji A E, Eisapour M, et al. The effect of soot accumulation and backpressure of an integrated after-treatment system on diesel engine performance[J]. Journal of Thermal Analysis and Calorimetry, 2021, 147: 8435-8443.
3 Sapra H, Godjevac M, Visser K, et al. Experimental and simulation-based investigations of marine diesel engine performance against static back pressure[J]. Applied Energy, 2017, 204: 78-92.
4 Dziubak T, Boruta G. Experimental and theoretical research on pressure drop changes in a two-stage air filter used in tracked vehicle engine[J]. Separations, 2021, 8(6): No.71.
5 Sivaram A R, Rajavel R, Jayakumar N, et al. Exhaust back pressure effect on the performance features of a diesel engine[J]. ARPN Journal of Engineering and Applied Sciences, 2017, 12: 5353-5356.
6 Xin Zhe, Wang Shunxi, Zhang Yin, et al. Pressure loss of urea-SCR converter and its influence on diesel engine performance[J]. Transactions of the Chinese Society of Agricultural Engineering, 2011, 27(8): 169-173.
7 Shabnam R A. Geometry mediated drag reduction using riblets and wrinkled surface textures[D]. Cambridge: Massachusetts Institute of Technology, 2018.
8 Rong Wan-ting, Zhang Hai-feng, Mao Zhi-gang, et al. Stable drag reduction of anisotropic superhydrophobic/hydrophilic surfaces containing bioinspired micro/nanostructured arrays by laser ablation[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021, 622: No. 126712.
9 许浩然. 形状、结构耦元对排气管减阻性能影响 [D]. 长春:吉林大学材料科学与工程学院,2015.
Xu Hao-ran. Influence of shape and structure coupling elements on drag reduction performance of exhaust pipe[D]. Changchun: School of Materials Science and Engineering, Jilin University, 2015.
10 Xu Jian-min, Zhou Shui-ting, Li Kun-sheng. Analysis of flow field and pressure loss for fork truck muffler based on the finite volume method[J]. International Journal of Heat and Technology, 2015, 33(3): 85-90.
11 Pangavhane S D, Ubale A, Tandon V, et al. Experimental and CFD analysis of a perforated inner pipe muffler for the prediction of backpressure[J]. International Journal of Engineering & Technology, 2013, 5(5): 115-119.
12 Lee S J, Jang Y G. Control of flow around a NACA 0012 airfoil with a micro-riblet film[J]. Journal of Fluids and Structures, 2005, 20(5): 659-672.
13 Viswanath P R. Aircraft viscous drag reduction using riblets[J]. Progress in Aerospace Sciences, 2002, 38(6/7): 571-600.
14 田丽梅, 王养俊, 李子源, 等. 仿生功能表面内流减阻测试系统的研制[J]. 吉林大学学报: 工学版, 2017, 47(4): 1179-1184.
Tian Li-mei, Wang Yang-jun, Li Zi-yuan, et al. Development of drag-reduction test system of bionic functional surfaces with internal flow[J]. Journal of Jilin University (Engineering and Technology Edition), 2017, 47(4): 1179-1184.
15 Liu Gui-jie, Yuan Zi-chao, Qiu Zhao-zun, et al. A brief review of bio-inspired surface technology and application toward underwater drag reduction[J]. Ocean Engineering, 2020, 199: No. 106962.
16 Tian Gui-zhong, Zhang Yao-sheng, Feng Xiao-ming, et al. Focus on bioinspired textured surfaces toward fluid drag reduction: recent progresses and challenges[J]. Advanced Engineering Materials, 2022, 24(1): No. 2100696.
17 Prajapati V D, Desai A J. Design and analysis of automotive muffler[J]. International Journal of Engineering Research & Technology (IJERT), 2016, 5(5): 384-389.
18 Sayinci B. Effect of strainer type, spray pressure, and orifice size on the discharge coefficient of standard flat-fan nozzles[J]. Turkish Journal of Agriculture and Forestry, 2015, 39(5): 692-704.
19 Payri R, Bracho G, Gimeno J, et al. Investigation of the urea-water solution atomization process in engine exhaust-like conditions[J]. Experimental Thermal and Fluid Science, 2019, 108: 75-84.
20 Zhang Hai-bin, Bai Bo-feng, Liu Li, et al. Droplet dispersion characteristics of the hollow cone sprays in crossflow[J]. Experimental Thermal and Fluid Science, 2013, 45: 25-33.
21 Sun Y B, Guan Z Q, Hal G, et al. Investigation on the influence of injection direction on the spray cooling performance in natural draft dry cooling tower[J]. International Journal of Heat and Mass Transfer, 2017, 110: 113-131.
22 Gao Ran, Liu Kai-kai, Li An-gui, et al. Biomimetic duct tee for reducing the local resistance of a ventilation and air-conditioning system[J]. Building and Environment, 2018, 129: 130-141.
23 Eggels J G M, Unger F, Weiss M H, et al. Fully developed turbulent pipe flow: a comparison between direct numerical simulation and experiment[J]. Journal of Fluid Mechanics, 1994, 268: 175-210.
24 Paul D. Advanced Approaches in Turbulence[M]. Netherlands: Elsevier, 2021: 161-241.
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