Simulations for Planning of Liquid Hydrogen Spill Test

Kevin Mangala Gitushi, Myra Blaylock and Ethan S. Hecht ()
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Kevin Mangala Gitushi: Mechanical and Aerospace Engineering Department, North Carolina State University, Raleigh, NC 27695, USA
Myra Blaylock: Sandia National Laboratories, Livermore, CA 94550, USA
Ethan S. Hecht: Sandia National Laboratories, Livermore, CA 94550, USA

Energies, 2023, vol. 16, issue 4, 1-15

Abstract: In order to better understand the complex pooling and vaporization of a liquid hydrogen spill, Sandia National Laboratories is conducting a highly instrumented, controlled experiment inside their Shock Tube Facility. Simulations were run before the experiment to help with the planning of experimental conditions, including sensor placement and cross wind velocity. This paper describes the modeling used in this planning process and its main conclusions. Sierra Suite’s Fuego, an in-house computational fluid dynamics code, was used to simulate a RANS model of a liquid hydrogen spill with five crosswind velocities: 0.45, 0.89, 1.34, 1.79, and 2.24 m/s. Two pool sizes were considered: a diameter of 0.85 m and a diameter of 1.7. A grid resolution study was completed on the smaller pool size with a 1.34 m/s crosswind. A comparison of the length and height of the plume of flammable hydrogen vaporizing from the pool shows that the plume becomes longer and remains closer to the ground with increasing wind speed. The plume reaches the top of the facility only in the 0.45 m/s case. From these results, we concluded that it will be best for the spacing and location of the concentration sensors to be reconfigured for each wind speed during the experiment.

Keywords: liquid hydrogen; CFD; crosswind; concentrations (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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