Analysis of the Influence of Diesel Nozzle Geometry in the Injection Rate Characteristic

[+] Author and Article Information
J. Benajes, J. V. Pastor, R. Payri, A. H. Plazas

CMT-Motores Térmicos Universidad Politécnica de Valencia, Valencia, Spain

J. Fluids Eng 126(1), 63-71 (Feb 19, 2004) (9 pages) doi:10.1115/1.1637636 History: Received January 17, 2003; Revised September 16, 2003; Online February 19, 2004
Copyright © 2004 by ASME
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Cavitation phenomenon in axy-symmetric nozzle
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Injection rate test rig
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Pressure influence on the wave gap at 30°C
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Sound speed u in the fuel as a function of pressure
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Nozzle modification (without sac)
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Pressure loss across the injector holder and the nozzle sac
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Cavitation test rig results
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Discharge coefficient for conical and cylindrical nozzles in the cavitation test rig
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Critical cavitation number
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Discharge coefficient vs. Reynolds number
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(a–h) Injection rate curves at different injection pressures
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Pressure drop during an injection event
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Maximum injection rate vs. pressure difference
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Maximum discharge coefficient vs. Pressure difference
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Discharge coefficient vs. K1/2
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Discharge coefficient vs. Reynolds number
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Comparison between CTR and IRTR




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