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The interaction between multiple high pressure combustion gas jets and water in a water-filled vessel |
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| Institution: | 1. Instituto de Ingeniería Energética, Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 València, Spain;2. Department of Mechanical Engineering and Construction, Universitat Jaume I, Campus del Riu Sec s/n, 12071 Castelló de la Plana, Spain;3. CMT-Motores Térmicos, Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 València, Spain;1. Institute of Nuclear Techniques (NTI) of the Budapest University of Technology and Economics (BME), Budapest, Hungary;2. Department of Thermohydraulics, Centre for Energy Research, Hungarian Academy of Sciences, Budapest, Hungary;3. University of Belgrade, Faculty of Mechanical Engineering, Serbia;4. Budapest University of Technology and Economics, Department of Electronics Technology, Hungary |
| Abstract: | A static experimental system based on the background of the underwater gun firing process is designed to simulate the expansion of conical-distributed multiple gas jets in a water-filled vessel. The gas is generated from the gunpowder combustion and injected into water through five orifices on a mock bullet. A high-speed digital camera is taken in experiment to record such expansion and the Euler-Euler multiphase model is utilized in simulation to describe the gas-liquid flow. Results show that the contraction of Taylor cavity in liquid and the gas-liquid entrainment both affect the shock structure in gas. The expansion zone near the orifice shrinks and the gas speed downs when the central gas jet has a contraction, but lateral jets have no contractions due to the obstruction from the wall. The contraction has a greater impact on the shock structure than the gas-liquid entrainment and occurs earlier under a higher injection pressure. |
| Keywords: | Combustion gas jet Gas-liquid turbulent mixing Taylor cavity Numerical simulation |
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