Simultaneous Measurement of Fuel Vapor Concentration and Droplets Density in an Evaporating Diesel Spray with Laser Light Absorption and Scattering : 2nd Report, Results in the High Temperature and High Pressure Ambient Condition

• Published in: Transactions of the Japan Society of Mechanical Engineers Series B Vol. 59; no. 563; pp. 2325 - 2333
• Main Authors: Suzuki, Mamoru, Nishida, Keiya, Hiroyasu, Hiroyuki
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 25.07.1993
• Subjects: Computed Tomographic Transformation
• ISSN: 0387-5016; 1884-8346
• DOI: 10.1299/kikaib.59.2325

The new technique for the simultaneous measurement of fuel vapor concentration and droplets density was adopted to the evaporating diesel spray injected into a high temperature and high pressure environment. This measuring technique was based on the principle of ultraviolet light absorption caused by the fuel vapor and visible light scattering caused by the droplets in the α-methylnaphthalene diesel spray. It was found that in the case of the free spray the distribution of the fuel vapor concentration is strongly affected by the ambient temperature, the specifications of the injection nozzle. In the case of the impinging spray, the optimum impingement distance exists to facilitate the droplets evaporation and fuel-air mixing on th impingement wall.