Improving droplet sizing methodology for spray dynamics investigation

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2016-04-21 DOI:10.1177/1756827716640244

J. J. Woo, V. Garaniya, R. Abbassi

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引用次数: 3

Abstract

Spray modelling is one of the most useful techniques to characterize engine performance, efficiency and emissions. The size of droplets is one of the key variables that govern the efficiency of combustion of the liquid fuel. This study aims to develop an interactive tool using MATLAB codes that identifies the droplets and their sizes from the image taken with the long distance microscope in the spray chamber setup. In this developed method, firstly the background of the image was removed and then image processing techniques, dilation and erosion, were applied to the image file to refine the image files. Subsequently, circle detection method based on the Hough Transform algorithm with the function of imfindcircles was implemented. This function of the program allows the user to identify size droplets from the image files. A statistical study was conducted with the results automated from the MATLAB program using a different set of threshold values of black and white contrast. The results showed an optimal range for the threshold (black and white) values between 40 and 70. This optimal threshold range was established based on consideration of the correct and incorrect identification of the droplets. The results indicated that the program has the ability to identify the droplet providing size and numbers. The MATLAB program was developed using MATLAB compiler and can be used at different workstations.

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改进喷雾动力学研究中的液滴尺寸测定方法

喷雾建模是表征发动机性能、效率和排放的最有用的技术之一。液滴的大小是决定液体燃料燃烧效率的关键变量之一。本研究旨在开发一个使用MATLAB代码的交互式工具，该工具可以从喷雾室设置的远程显微镜拍摄的图像中识别液滴及其大小。该方法首先去除图像背景，然后对图像文件应用膨胀和侵蚀等图像处理技术，对图像文件进行细化处理。随后，实现了基于Hough变换算法的圆检测方法，该方法具有imfindcircles的功能。该功能的程序允许用户从图像文件中识别大小液滴。使用一组不同的黑白对比度阈值，对MATLAB程序自动生成的结果进行统计研究。结果显示阈值(黑色和白色)值的最佳范围在40和70之间。该最优阈值范围是在考虑液滴识别的正确和错误的基础上建立的。结果表明，该程序具有识别液滴大小和数量的能力。MATLAB程序是用MATLAB编译器开发的，可以在不同的工作站上使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.