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RESEARCH PAPERS

On the Mechanism of Flashing Injection of Initially Subcooled Fuels

[+] Author and Article Information
R. D. Oza

Engine Research Department, General Motors Research Laboratories, Warren, Mich. 48090

J. Fluids Eng 106(1), 105-109 (Mar 01, 1984) (5 pages) doi:10.1115/1.3242383 History: Received September 22, 1982; Online October 26, 2009

Abstract

The mechanisms responsible for flash-boiling injection were investigated. Using an electromagnetic injector developed for this study, propane, methanol and Indolene were heated and injected into a constant-volume vessel. Two regimes of flash-boiling injection were identified. In the first regime, flash-boiling occurs within the injector nozzle without an increase in spray-cone angle. In the second regime, the nozzle exit pressure is sufficiently low that the two-phase compressible mixture created by flash-boiling within the injector nozzle is underexpanded at the nozzle exit and expands externally to increase the spray-cone angle.

Copyright © 1984 by ASME
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