CFD Modeling of a Supersonic Gas Injector
- 1. Josué Quiñonez | Dr. Farhat Beg COMPUTATIONAL FLUID DYNAMICS MODELING OF A SUPERSONIC GAS INJECTOR FOR PULSED POWER TARGET The University of California, San Diego
- 2. MOTIVATION • Energy sources today such as coal and oil are becoming more of an issue to use • Alternative Energy Sources
- 3. 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
- 4. 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
- 5. 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
- 6. GAS DYNAMICS Mach Number • The ratio of the velocity of an object over the speed of sound State Variables: • Pressure, Temperature, Density Flow Conditions: • Isentropic Flow • Steady State
- 7. CREO 3D MODELING • Areas of Inlet, Throat, & Nozzle Exit
- 8. COMPUTATIONAL FLUID DYNAMICS Selecting a Program • ANSYS Fluent, Comsol & Openfoam Comsol • Issues converging at high Mach number flows as well as multi-phase flows Openfoam • Is a free open source program but it lacks a graphic user interface • Difficult to learn in a time constrained project
- 9. ANSYS FLUENT SIMULATION PROCEDURE
- 13. RESULTS
- 14. 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
- 15. ACKNOWLEDGEMENTS Mentors: • Farhat Beg, Ph.D. • Julio Valenzuela, Ph.D. • Igor Krasheninnikov, B.S. STARS Program: • Elisa Maldonado, Ph.D. • Joshua Francois, B.S.
- 16. THANK YOU
Editor's Notes
- #3: Find energy trend graph on google
- #4: What is Nuclear Fusion (define)
- #5: Current creates the plasma and madnetic The interaction between the current and the magnetic field is known as the Lorentz force Which causes compression of the plasma This compression is known as a Z-Pinch
- #9: Why we chose fluent over openfoam and comsol (convergence) Openfoam is a free open source program but it has no gui and it is intense to learn (time constraints could not use it) Comsol has issues converging high mach number flows as well as multi phase flows DeLaval Nozzles (explain how they work)
- #14: Add Drawings make diagram readable