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Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
December, 14-17, 2023, Bihar, India

Design Verification of an Inverted Conical Slosh Suppression Baffle of an Oxidiser tank of an Inter-planetary mission through CFD Simulations

Get access (open in a dialog) DOI: 10.1615/IHMTC-2023.1100
pages 681-686


Integrated propulsion module of inter-planetary mission being undertaken by ISRO consists of different thrusters. These thrusters use monomethyl hydrazine (MMH) and nitrogen tetroxide (MON3) as fuel and oxidiser respectively for propulsion. Fuel and oxidiser are stored in cylindrical tanks with spherical end domes. Slosh in these tanks required to be mathematically modelled in control stability studies. These studies help in finalising the damping requirements and its duration. Such damping requirements are normally met by either annular ring baffle or by a set of vertical baffles. Present damping requirement is optimally met by an inverted conical baffle based on the mass constraint. Design of conical baffle is done using semiempirical relation. Verification of the designed baffle is carried out using ANSYS CFD software.
Numerical simulations for slosh in a oxidiser tank with an inverted conical baffle to verify its design is carried out using ANSYS CFD software. Parameters such as slosh frequency, slosh mass and baffle damping are estimated for different fill heights in the vicinity of the baffle. This paper gives the details of design verification carried out with respect to slosh parameters including baffle damping. In addition to the above, influence of the conical baffle on slosh parameters is also studied by carrying out numerical simulations with bare tank.