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TECHNICAL PAPERS

Numerical Simulation of Two-Phase Flow in Injection Nozzles: Interaction of Cavitation and External Jet Formation

[+] Author and Article Information
Weixing Yuan

Aerodynamics Laboratory, Institute for Aerospace Research, National Research Council of Canada, Ottawa, ON K1A OR6, Canadae-mail: weixing.yuan@nrc-cnrc.gc.ca

Günter H. Schnerr

Fachgebiet Gasdynamik, Lehrstuhl für Fluidmechanik, Technische Universität München, D-85747 Garching, Germanye-mail: schnerr@flm.mw.tu-muenchen.de

J. Fluids Eng 125(6), 963-969 (Jan 12, 2004) (7 pages) doi:10.1115/1.1625687 History: Received March 11, 2002; Revised May 14, 2003; Online January 12, 2004
Copyright © 2003 by ASME
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References

Figures

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Computational mesh and boundary conditions of the two-dimensional plane model injection nozzle
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Experimental density gradient and velocity distribution in the nozzle hole for pInjection=80 bar and pExit=21 bar, flow from left to right, from Roosen et al. 15
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Computed steady vapor fraction distribution in the nozzle hole. pInlet=80 bar,pExit=21 bar=const.,Re=ūInlet⋅H/ν≈2.78×104.
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Experimental density gradient and velocity distribution in the nozzle hole for pInjection=80 bar and pExit=11 bar, flow from left to right, from Roosen et al. 15
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Computed steady vapor fraction distribution in the nozzle hole. pInlet=80 bar,pExit=11 bar=const.,Re=ūInlet⋅H/ν≈2.78×104.
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Computed steady vapor fraction distribution. pInlet=800 bar,pExit=11 bar=const.,Re=ūInlet⋅H/ν≈8.82×104.
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Integrated total vapor volume within and outside the nozzle (top) and mass flow rate at the nozzle exit (bottom) depending on the rectangular inlet pressure pulse. Downstream chamber pressure pExit=11 bar=const.,Re=ūInlet⋅H/ν≈2.78×104.
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Unsteady supercavitation of one cycle. Periodic unsteady inlet pressure pInlet=80±10 bar,f=37.25 kHz, downstream chamber pressure pExit=11 bar=const.,Re=ūInlet⋅H/ν≈2.78×104. Left: vapor fraction distribution; right: air fraction distribution.
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Unsteady jet flow nearby the nozzle exit. Periodic unsteady inlet pressure pInlet=80±10 bar,f=37.25 kHz, downstream chamber pressure pExit=11 bar. Left: computed with cavitation model, Re=ūInlet⋅H/ν≈2.78×104; right: computed without cavitation model, Re=ūInlet⋅H/ν≈3.0×104.

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