Three dimensional velocity measurement in cylinder flow by colored layers method

彩色层法测量圆柱流三维速度

• 批准号: 02650164
• 负责人: TASAKA Hidenori
• 金额: $ 1.15万
• 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: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650164/
• 关键词: Internal Combustion engine; In-Cylinder flow; Velocity measurement; Flow visualization; Colored layer method; Electorooptical shutter; ガス流動; 可視化計測; 速度分布; 色層処理

As the in-cylinder flow of an engine effects largely to the combustibility. thermal efficiency and exhaust emissions. the measurement of flow velocity is one of the most important problem in engine researches. In this research, the velocity in ati engine was measured in using flow visualization method. In addition to this, the colored layers method was adopted to distinguish the location of the tracers to the depth direction of the tracer images. First of all, usual twodimensional method was examined and it was found that the electro-optical shutter was effective to the measuring system. The flow direction was determined by the two-pulse method, that is, the double exposed method in one short and the other long exposure time in one image. And the traceability of the tracers were examined by calculatiotis and the most suitable one was adapted. The colored layers were made by the prismatic spectrum of the light source. The fundamental procedure was examined by the linear movement of a tracer. The priciple of this system was confirmed but the accuracy of finding location to the depth direction was not sufficient. Also the tracer image was taken at the modelized cylinder. The data of the depth location were analized by the image processing in color and the approximate location was found. Further investigation should be done after these results.

由于发动机缸内流动对燃烧性能的影响很大。热效率和废气排放。在发动机的研究中，流体速度的测量是最重要的问题之一。本研究利用流动显示法测量了ati发动机内的速度。此外，还采用了彩色分层方法，在示踪剂图像的深度方向上区分示踪剂的位置。首先，对常用的二维测量方法进行了检验，发现光电快门对测量系统是有效的。通过双脉冲方法确定流动方向，即在一个图像中在一个短曝光时间和另一个长曝光时间中的双曝光方法。并通过计算检验示踪剂的溯源性，选择最合适的示踪剂。着色层由光源的棱镜光谱制成。通过示踪剂的线性运动来检查基本程序。该系统的原理得到了证实，但在深度方向上的定位精度不够。还在模型化圆柱体处拍摄示踪剂图像。通过彩色图像处理对深度定位数据进行分析，得到了深度定位的大致位置，为进一步的研究提供了依据。