CFD Modeling of a Supersonic Gas Injector
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Transcript of CFD Modeling of a Supersonic Gas Injector
Josué Quiñonez | Dr. Farhat Beg
COMPUTATIONAL FLUID DYNAMICS MODELING OF A SUPERSONIC GAS
INJECTOR FOR PULSED POWER TARGET
The University of California, San Diego
MOTIVATION• Energy sources today such as coal and oil are
becoming more of an issue to use• Alternative Energy Sources
NUCLEAR FUSION• A nuclear reaction, in which lighter nuclei are
combined together to form heavier product nuclei with the release of an enormous amount of energy
Z-PINCH• An injection of gas into the current generator electrodes
• We use 1 MA current generator that compresses the plasma in a 100 ns
OBJECTIVE• To design a gas injector in order to funnel a
uniform gas flow to be compressed and heated by an intense current pulse and produce fusion reactions
GAS DYNAMICSMach Number• The ratio of the velocity
of an object over the speed of sound
State Variables:• Pressure, Temperature,
DensityFlow Conditions:• Isentropic Flow• Steady State
CREO 3D MODELING• Areas of Inlet, Throat, &
Nozzle Exit
COMPUTATIONAL FLUID DYNAMICSSelecting a Program• ANSYS Fluent, Comsol & Openfoam
Comsol• Issues converging at high Mach number flows as
well as multi-phase flowsOpenfoam• Is a free open source program but it lacks a
graphic user interface• Difficult to learn in a time constrained project
ANSYS FLUENT SIMULATION PROCEDURE
ANSYS FLUENT GEOMETRY
ANSYS FLUENT MESH
ANSYS FLUENT SETUP
RESULTS
FUTURE WORK
• Implementing engineering principles in the design we hope to soon begin the manufacturing process
• It is believed that with enough current and understanding of the phenomena we might achieve ‘break-even’ in the short term and a fusion power plant in the future
ACKNOWLEDGEMENTSMentors:• Farhat Beg, Ph.D.• Julio Valenzuela, Ph.D.• Igor Krasheninnikov, B.S.
STARS Program:• Elisa Maldonado, Ph.D.• Joshua Francois, B.S.
THANK YOU