A five equation model for the simulation of the two-phase flow in cryogenic coaxial injector

Modélisation 5 équations pour la simulation diphasique dans les moteurs à injecteur coaxial

Angelo Murrone (1) , Aymeric Boucher (2) , Pierre Cordesse (1, 3)

1 DMPE, ONERA, Université Paris Saclay (COmUE) [Châtillon]
2 DMPE, ONERA, Université Paris Saclay (COmUE) [Palaiseau]
3 CMAP - Centre de Mathématiques Appliquées - Ecole Polytechnique

In this paper, we propose models and methods for the simulation of two-phase flows in Liquid Rocket Engines (LRE) under subcritical conditions. The numerical strategy consists into coupling models dedicated to different topologies. Actually, we propose a five equation diffuse interface model for the treatment of the dense "separated two-phase flow" near the injector and an Eulerian kinetic based model for the "dispersed two-phase flow" in the chamber. We derive a novel formulation of the 5 equation system to build a robust HLLC type scheme. Then we use a fully Eulerian coupling strategy to take into account for primary atomization. We first run classical test cases in order to validate the numerical methods. Then a simulation on a test case representative to one coaxial injector is performed under subcritical conditions.

Mots clés: LIQUID ROCKET ENGINES; NUMERICAL SIMULATION; DIFFUSE INTERFACE MODELLING; PRIMARY ATOMIZATION; COUPLING

Mots clés: ATOMISATION PRIMAIRE; MOTEUR FUSEE CRYOGENIQUE; SIMULATION NUMERIQUE; INTERFACE DIFFUSE; COUPLAGE

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]

Angelo Murrone, Aymeric Boucher, Pierre Cordesse. A five equation model for the simulation of the two-phase flow in cryogenic coaxial injector. 25th AIAA/CEAS Aeroacoustics Conference, May 2019, DELFT, Netherlands. ⟨hal-02195012⟩