发动机泄漏辅助制动数值模拟

罗福强; 杭瑾; 何仁

doi:10.19818/j.cnki.1671-1637.2009.05.010

发动机泄漏辅助制动数值模拟

doi: 10.19818/j.cnki.1671-1637.2009.05.010

江苏大学汽车与交通工程学院, 江苏镇江 212013

基金项目:

国家863计划项目 2006AA11A1B4

江苏省汽车工程重点实验室开放基金项目 QC200507

详细信息

作者简介:
罗福强(1963-), 男, 湖南邵东人, 江苏大学教授, 工学博士, 从事发动机工作过程研究

中图分类号: U461.3
计量
- 文章访问数: 699
- HTML全文浏览量: 204
- PDF下载量: 404
- 被引次数: 0
出版历程
- 收稿日期: 2009-05-21
- 刊出日期: 2009-10-25

Numerical simulation of engine bleeding brake

School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

More Information

Author Bio:
LUO Fu-qiang(1963-), male, professor, PhD, + 86-511-8780072, 15432154321@163.com

Article Text (Baidu Translation)

摘要

摘要: 为了研究发动机泄漏辅助制动系统的工作过程, 应用计算流体力学软件Fluent建立了发动机泄漏辅助制动系统的数值模拟计算模型, 利用压力曲线对模型进行了验证, 计算了发动机泄漏制动时的缸内压力和流场分布情况。发现: 发动机泄漏辅助制动系统工作时, 排气门预开间隙大, 则缸内所能达到的压力峰值小, 得到的制动功率小。在压缩过程开始阶段与膨胀过程中, 出现了气体由排气道倒流入气缸中的现象, 且转速低, 排气门开度大时, 倒流现象出现得早。分析结果表明: 适当选择排气门预开间隙, 可以提高发动机泄漏辅助制动系统的制动功率。
- 汽车工程 /
- 发动机泄漏辅助制动 /
- 数值模拟 /
- 缸内压力 /
- 流场
Abstract: In order to investigate the working process of engine bleeding brake, a numerical simulation model was built by computational fluid dynamics software Fluent. Its prescision was tested by using pressure curves. The pressure and flowfield of cylinder under bleeding brake were calculated. It is pointed that when exhaust valve lash is larger, the maximum pressure of cylinder and brake power are smaller in the working process of engine bleeding brake. At the beginning of compress process and the expand process, gas flows into cylinder from exhaust pipe. When engine speed is higher and exhaust valve lash is larger, the starting of flow backwards is earlier. The result indicates that the brake power of engine bleeding brake will increase if the choice of exhaust valve lash is reasonable.
- automobile engineering /
- engine bleeding brake /
- numerical simulation /
- cylinder pressure /
- flowfield

HTML全文

图 1 发动机泄漏辅助制动系统网格模型

Figure 1. Grid model of engine bleeding brake

下载: 全尺寸图片幻灯片

图 2 试验结果与模拟结果对比

Figure 2. Comparison of simulation result with experimental result

下载: 全尺寸图片幻灯片

图 3 模拟结果对比

Figure 3. Comparison of simulation results

下载: 全尺寸图片幻灯片

图 4 转速为900 r·min^-1, 排气门开度为0.5 mm时的流场

Figure 4. Flowfields when engine speed is 900 r·min^-1 and exhaust valve lash is 0.5 mm

下载: 全尺寸图片幻灯片

图 5 转速为1 900 r·min^-1, 排气门开度为0.5 mm时的流场

Figure 5. Flowfields when engine speed is 1 900 r·min^-1 and exhaust valve lash is 0.5 mm

下载: 全尺寸图片幻灯片

图 6 转速为2 800 r·min^-1, 排气门开度为0.5 mm时的流场

Figure 6. Flowfields when engine speed is 2 800 r·min^-1 and exhaust valve lash is 0.5 mm

下载: 全尺寸图片幻灯片

图 7 转速为900 r·min^-1, 排气门开度为1.0 mm时的流场

Figure 7. Flowfields when engine speed is 900 r·min^-1 and exhaust valve lash is 1.0 mm

下载: 全尺寸图片幻灯片

图 8 转速为1 900 r·min^-1, 排气门开度为1.0 mm时的流场

Figure 8. Flowfields when engine speed is 1 900 r·min^-1 and exhaust valve lash is 1.0 mm

下载: 全尺寸图片幻灯片

图 9 转速为2 800 r·min^-1, 排气门开度为1. 0 mm时的流场

Figure 9. Flowfields when engine speed is 2 800 r·min^-1 and exhaust valve lash is 1.0 mm

下载: 全尺寸图片幻灯片

参考文献(10)

[1]	董颖, 何仁. 发动机制动技术的研究与展望[J]. 车用发动机, 2006(3): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-CYFD200603000.htm DONG Ying, HE Ren. Study and development of engine braking technology[J]. Vehicle Engine, 2006(3): 1-5. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-CYFD200603000.htm
[2]	马建, 陈荫三, 余强, 等. 缓行器对汽车制动稳定性影响评价[J]. 交通运输工程学报, 2002, 2(1): 105-109. http://transport.chd.edu.cn/article/id/200201023 MA Jian, CHEN Yin-san, YU Qiang, et al. Evaluation of retarder to automobile braking stability[J]. Journal of Traffic and Transportation Engineering, 2002, 2(1): 105-109. (in Chinese) http://transport.chd.edu.cn/article/id/200201023
[3]	袁亚飞. 发动机辅助制动研究[D]. 镇江: 江苏大学, 2008. YUAN Ya-fei. Study on the engine auxiliary brake[D]. Zhenjiang: Jiangsu University, 2008. (in Chinese)
[4]	董颖. 发动机制动的工作机理及性能分析研究[D]. 镇江: 江苏大学, 2007. DONG Ying. Working process and performance research of engine as retarder[D]. Zhenjiang: Jiangsu University, 2007. (in Chinese)
[5]	史春涛, 张宝欢, 金则兵, 等. 湍流模型的发展及其在内燃机CFD中的应用[J]. 拖拉机与农用运输车, 2006, 33(1): 5-10. https://www.cnki.com.cn/Article/CJFDTOTAL-TLJY200601002.htm SHI Chun-tao, ZHANG Bao-huan, JIN Ze-bing, et al. Development of turbulence model and its application in the CFD of IC engine[J]. Tractor and Farm Transporter, 2006, 33(1): 5-10. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TLJY200601002.htm
[6]	王海刚, 刘石. 不同湍流模型在内燃机缸内流动过程数值模拟中的应用和比较[J]. 燃烧科学与技术, 2004, 10(1): 66-71. https://www.cnki.com.cn/Article/CJFDTOTAL-RSKX200401013.htm WANG Hai-gang, LIU Shi. Application and comparison of different turbulent models with computations of in-cylinder turbulent flows in ICE[J]. Journal of Combustion Science and Technology, 2004, 10(1): 66-71. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-RSKX200401013.htm
[7]	何仁, 董颖, 牛润新. 车用发动机缓速器工作循环的理论分析[J]. 农业机械学报, 2007, 38(12): 36-40. https://www.cnki.com.cn/Article/CJFDTOTAL-NYJX200712011.htm HE Ren, DONG Ying, NIU Run-xin. Working cycle analysis of the engine retarder[J]. Transactions of the Chinese Society for Agricultural Machinery, 2007, 38(12): 36-40. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-NYJX200712011.htm
[8]	王东, 蒲小琼. 基于SolidWorks的机械零件参数化设计[J]. 机械制造与自动化, 2004, 33(5): 15-17. https://www.cnki.com.cn/Article/CJFDTOTAL-ZZHD200405005.htm WANG Dong, PU Xiao-qiong. Parametrical design of mechanical parts based on SolidWorks[J]. Machine Building and Automation, 2004, 33(5): 15-17. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZZHD200405005.htm
[9]	董西军. 基于SolidWorks的参数化设计[J]. 机械制造与自动化, 2007, 36(2), 26-27, 30. https://www.cnki.com.cn/Article/CJFDTOTAL-ZZHD200702009.htm DONG Xi-jun. Parametric design based on SolidWorks[J]. Machine Building and Automation, 2007, 36(2): 26-27, 30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZZHD200702009.htm
[10]	余江洪, 肖金生, 朱宗柏. Fluent软件的多重网格并行算法及其性能[J]. 武汉理工大学学报: 交通科学与工程版, 2009, 33(1): 133-136. https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ200901034.htm YU Jiang-hong, XIAO Jin-sheng, ZHU Zong-bo. Parallel multi-grid algorithm and its performance of Fluent software[J]. Journal of Wuhan University of Technology: Transportation Science and Engineering, 2009, 33(1): 133-136. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JTKJ200901034.htm