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Experimental Study on the Macroscopic Spray Characteristics of DME Fuel  

Park, Jeong-Hwan (한양대학교 대학원 기계공학과)
Park, Su-Han (한양대학교 대학원 기계공학과)
Lee, Chang-Sik (한양대학교 기계공학부)
Park, Sung-Wook (한양대학교 기계공학부)
Publication Information
Journal of ILASS-Korea / v.15, no.3, 2010 , pp. 115-123 More about this Journal
Abstract
The purpose of this study is to compare and to investigate spray characteristics of dimethyl ether (DME) and diesel fuel in the various injection pressures, ambient pressures, and the energizing durations. For the analysis of the spray characteristics, the spray visualization system including the high speed camera and the spray image analyzer is installed. The spray characteristics such as the spray development process, spray tip penetraion and the spray cone angle are analyzed from the spray images. It was revealed that the spray characteristics of DME and diesel fuels are mainly affected by the injection conditions. However, in the region after the end of the injection, the spray tip penetration was affected by the fuel properties such as the fuel density, the surface tension, and the viscosity. DME fuel has generally a short tip penetration and a wide cone angle. In the elevating conditions of the ambient gas pressure, the spray cone angle of DME fuel converged to high value when comparing diesel fuel in advance. Also, the increasing rate of the spray tip penetration in DME fuel is significantly decreased from 0.7 ms of the energizing duration (diesel : 0.9 ms).
Keywords
Dimethyl-ether(DME); Spray cone angle; Spray tip penetration; Injection conditions; Spray visualization;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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