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Swirl Simulation of In-Cylinder Flow by a Simplified Simulation model and Confirmation by Results of the Color Layr Flow Visualization

通过简化仿真模型对缸内流动进行旋流模拟并通过彩色层流可视化结果进行确认

基本信息

批准号：
04650197
负责人：
TASAKA Hidenori
金额：
$ 1.28万
依托单位：
Miyazaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650197/
关键词：
Internal Combustion Engine In-Cylinder Flow Simulation Flow Visualization three dimension color layr 色相

项目摘要

As the in-cylinder flow of an internal combustion engine affects largely to the combustibility, thermal efficiency and exhasut gas emissions, the prediction and measurement of in-sylinder flow is one of the most important subjects in an engine. In this research, a simplified simulation model was uesd because of its simplicity and utilization to predict swirly velocity. But this model did not confirmed perfectly, then the examination of it was done by comparing velocity measured by the color layr method of three dimensional flow visualization. At first, the system of color layr flow visualization was improved especially for the light source but the time spent for this work was so large and the result was unsatisfactory. Simulation for the evaluation of valve timing was made and the results was rather desirable, that is, the valve timing affects to the induction swirl as well as the amount of intake new charge. As summery of this research, the utilazation of simulation model brought rather desirable results but the examination of this model was left as before.Further experiment and research should be done after these results.

由于内燃机缸内流量对燃烧性、热效率和废气排放影响很大，因此缸内流量的预测和测量是发动机最重要的课题之一。在本研究中，使用了简化的模拟模型，因为它简单且可用于预测涡流速度。但这个模型并没有得到很好的证实，于是通过比较三维流可视化色层法测量的速度来对其进行检验。起初，对色层流可视化系统进行了特别是光源方面的改进，但这项工作花费的时间较长，而且结果并不令人满意。对配气正时进行了仿真评估，结果较为理想，即配气正时对进气涡流以及进气量的影响。从本研究的总结来看，仿真模型的使用带来了相当理想的结果，但对该模型的检验却停留在以前的水平上。在这些结果之后，还需要进行进一步的实验和研究。