Parallelisation to Several Tens-of-Thousands of Cores

Bassi, Francesco; Botti, Lorenzo Alessio; Verzeroli, Luca; Hartmann, Ralf; Jägersküpper, Jens; Martin, E. Dale; Lorteau, Mathieu; Vincent, Peter; Witherden, Freddie D.; Vermeire, Brian C.; Park, J. S.; Iyer, Arvind S.; Puri, Kunal; Gutzwiller, David P.; Hirsch, Charles; Chalot, F.

doi:10.1007/978-3-030-62048-6_8

Cited by 1 publication

(1 citation statement)

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“…With an appropiate time step of 0.1 s, a HRE firing during 5 seconds can be simulated in 5 minutes of CPU time on a desktop computer. On the contrary, a 2-D axisymmetrical single instant RANS simulation of a HRE combustion chamber, performed with a CFD tool such as CEDRE [40], can take more than 2 hours CPU on our supercomputer (SATOR) [41].…”

Section: B Numerical Methods Resolutionmentioning

confidence: 99%

Pseudo-Two-Dimensional Modeling and Validation of a Hybrid Rocket Combustion Chamber

Granado

Hijlkema

Lestrade

et al. 2022

Journal of Propulsion and Power

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A pseudo 2-D model for the cylindrical combustion chamber of a hybrid rocket is developed in this article with the purpose of its integration in a system design tool used for engine predesign phases. A compromise of simplicity and accuracy is thus required. Integral transient boundary layer equations are included and coupled with the mass and energy balances at the fuel surface, where fuel pyrolysis is described by an Arrhenius law. Studies assessing the model in the non-reactive case provide satisfactory results regarding the description of the boundary layer. Concerning the hybrid case, the computed steady-state fuel regression rates are found to be in the low region of the reference values coming from semiempirical laws for several oxidizer/fuel couples and oxidizer mass fluxes, producing errors up to 50% for certain sources. The effect of mass flux and motor size is correctly simulated. Eventually, the whole engine operation is assessed through the comparison of the computed results with three experimental tests realized at our laboratory and using a 87.5% Hydrogen Peroxide/High-Density Polyethylene couple. Corresponding results lead to regression rate errors varying in a wide range (from 10

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Section: B Numerical Methods Resolutionmentioning

confidence: 99%