Validation of predictive performance models for supersonic gas-jet nozzles at the Laboratory for Laser Energetics.
| Autor: | McMillen KR; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Heuer PV; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Gjevre JM; University of Alberta, Edmonton, Alberta T6G 2R3, Canada., Milder AL; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Charles P; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Filkins T; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Rinderknecht HG; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Froula DH; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA., Shaw JL; University of Rochester's Laboratory for Laser Energetics, Rochester, New York 14623, USA. |
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| Jazyk: | angličtina |
| Zdroj: | The Review of scientific instruments [Rev Sci Instrum] 2024 Jul 01; Vol. 95 (7). |
| DOI: | 10.1063/5.0215756 |
| Abstrakt: | We present results characterizing the neutral-density distributions produced by the supersonic nozzles used in experiments on the OMEGA-60 and OMEGA-EP laser systems at the University of Rochester's Laboratory for Laser Energetics (LLE). Axisymmetric Fluent® simulations using LLE nozzle specifications capture the viscous effects, gas expansion, and shock waves that complicate flow predictions for offsets above the nozzle exit. These simulations show good agreement with neutral-density measurements obtained using a four-wave shearing interferometer. An analytical form is given for the plateau length. Fits to simulation data for boundary layer thickness, mean plateau density, and density ramps are given as functions of nozzle offset and nozzle backing pressure for a number of nozzles and gases. (© 2024 Author(s). Published under an exclusive license by AIP Publishing.) |
| Databáze: | MEDLINE |
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