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Study on the Spray Behavior from Swirl and Fan Spray Type Gasoline Injectors Impinging on the Constant Temperature Flat Plate  

Kim, Chong-Min (School of Mechanical & Aerospace System Engineering, Chonbuk National University)
Kang, Shin-Jae (School of Mechanical & Aerospace System Engineering, Chonbuk National University)
Kim, Man-Young (School of Mechanical & Aerospace System Engineering, Chonbuk National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.2, 2006 , pp. 100-106 More about this Journal
Abstract
The behavior of spray impinging on the inclined constant temperature flat plate was experimentally investigated. To clarify the wall effect of a high pressure DISI injector, a relative angle of the inclined wall to a spray axis was varied. Spray penetration along the wall was observed optically and it was compared with that of a Fan spray type and Swirl type spray. To evaluate various spray motion quantitatively, a spray path penetration which describe the development of a spray tip along the wall was newly introduced. To observe the structure of an impinging spray, it was visualized by a controlled stroboscope light and its visualized image was captured on an CCD camera. Using the digital image of impinging spray $H_x$ and $R_x$ was extracted to clarify the structure of impinging spray. The main parameter of the relative position of the wall was the inclined angle which was defined as the angle was varied from $0^{\circ}$ (vertical impingement) to $60^{\circ}$ at the same condition.
Keywords
DISI(Direct Injection Spark Ignition); Plate impinging; Spray visualization; Swirl type injector; Fan spray type injector;
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