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工程设计学报
工程设计学报  2016, Vol. 23 Issue (3): 235-243    DOI: 10.3785/j.issn. 1006-754X.2016.03.007
建模、分析、优化和决策     
气动发动机缸内流场特性研究
李玉龙1, 宋宇1, 朱德泉1, 蒋峰1, 朱烨1, 焦俊2
1. 安徽农业大学 工学院, 安徽 合肥 230036;
2. 安徽农业大学 信息与计算机学院, 安徽 合肥 230036
Research on characteristics of flow field in the cylinder of air powered engine
LI Yu-long1, SONG Yu1, ZHU De-quan1, JIANG Feng1, ZHU Ye1, JIAO Jun2
1. School of Engineering, Anhui Agricultural University, Hefei 230036, China;
2. College of Information & Computer, Anhui Agricultural University, Hefei 230036, China
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摘要：

以全新研制的电控气动发动机气缸流场域为研究对象,建立其几何模型,运用CFD前处理软件ICEM对流场域几何模型进行网格划分,再运用Fluent动网格技术进行动态模拟计算,分析其气缸内部流场特性,进而得出气体在工作过程中各个阶段的压力场和速度场分布.同时,将模拟计算数值与气动发动机台架实验所得值进行比较.结果表明:动网格数值模拟结果与实验结果较为接近,气动发动机气缸内流场动态仿真过程准确可靠,仿真结果可为气动发动机设计提供参考.当转速稳定于450 r/min时,由仿真模拟所得数据计算得此气动发动机指示功率为0.62 kW,实验时测算得同条件下实验指示功率为0.55 kW,求得仿真和实验指示功率的最大误差为11.2%.利用自制的测功装置测得实验时有效功率为0.45 kW,进而求得机械效率为81.8%.研究结果为下一步改善气动发动机性能提供了依据.
关键词： 气动发动机;  动网格技术;  缸内流场;  特性研究    
Abstract:

The cylinder flow field in the electronic controlled air powered engine which is new developed is studied as the object. Firstly, the geometry model was built and the pre-processing software-ICEM of CFD was used to mesh the model. Then, the dynamic simulation was done by moving-grid technology in the Fluent software. After it was done, the characteristics of the internal flow field were analyzed, then the distribution of velocity field and pressure field about the gas in the process of working were obtained. At the same time, comparisons were made between the numerical simulation calculation and the experimental results in bench of air powered engine. The results showed that the results with numerical simulation of moving-grid were close to experimental results, the dynamic process of the flow field in cylinder of the engine was accurate and reliable, the results of simulation could provide a reference for the design of the engine. When the rotational speed was 450 r/min, the simulative indicated power of air powered engine was 0.62 kW and the experimental indicated power was 0.55 kW under the same conditions, the maximum error of the indicated power between simulative results and experimental results was 11.2%. The effective power of air powered engine was 0.45 kW by the data in the power measuring device, while using homemade dynamometer device, and then acquiring the mechanical efficiency was 81.8%. The research results provide the basis for the further improvement of the air powered engine's performance.
Key words: air powered engine    moving-grid technology    flow field in cylinder    research on characteristic
收稿日期: 2015-09-12 出版日期: 2016-06-28
CLC:  U469.76  
基金资助:

安徽省教育厅自然科学研究重点项目(KJ2013A107);安徽农业大学稳定和引进人才基金资助项目(WD2013-11);安徽农业大学学科骨干培育项目(2014XKPY-49);江苏省产学研合作资助项目(BY2012148).
通讯作者: 宋宇(1971-),男,安徽濉溪人,副教授,硕士生导师,博士,从事现代设计方法和理论、车辆动力学与控制和清洁能源等研究,E-mail:songyu@ahau.edu.cn.     E-mail: songyu@ahau.edu.cn
作者简介: 李玉龙(1989-),男,安徽六安人,硕士生,从事车辆动力工程、发动机结构设计和性能研究,E-mail:ahnydxlyl@sina.com.http://orcid.org//0000-0003-0765-7972;宋宇(1971-),男,安徽濉溪人,副教授,硕士生导师,博士,从事现代设计方法和理论、车辆动力学与控制和清洁能源等研究,E-mail:songyu@ahau.edu.cn.http://orcid.org//0000-0003-0056-6744
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引用本文:

李玉龙, 宋宇, 朱德泉, 蒋峰, 朱烨, 焦俊. 气动发动机缸内流场特性研究[J]. 工程设计学报, 2016, 23(3): 235-243.

LI Yu-long, SONG Yu, ZHU De-quan, JIANG Feng, ZHU Ye, JIAO Jun. Research on characteristics of flow field in the cylinder of air powered engine. Chinese Journal of Engineering Design, 2016, 23(3): 235-243.

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https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn. 1006-754X.2016.03.007    或    https://www.zjujournals.com/gcsjxb/CN/Y2016/V23/I3/235

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