Application of Improved Gas/Liquid Methodology to High Speed Venting and Bulk-Flyout Problems

Progress in Modeling Missile Fuel Venting and Plume Contrail Formation

“…Based on recent work performed for analyzing cavitating flows, a new gas/liquid formulation was developed 7 that implements a unified thermodynamic formulation (not requiring the use of VOF methodology) in conjunction American Institute of Aeronautics and Astronautics with preconditioning, permitting the code to operate over a broad range of conditions. This newer gas /liquid formulation is operational in the unstructured code, CRUNCH, and its assessment for application to higher speed bulk dispense and venting problems has been performed as part of an IR&D effort described in another paper at this meeting 8 . This same formulation has just been incorporated into our new plume codes with very preliminary results for a liquid jet described in Sections IV.B and C.…”

“…The new gas/liquid methodology, discussed in Ref [8], is used to simulate the discharge of a liquid jet into a gas freestream, and track the gas/liquid interface. Two different transverse jet cases are demonstrated with the gas moving (downward in Figure 7) with a velocity of 100 m/s and the liquid jet penetrating the gas stream at a velocity of 5 m/s.…”

Simulation of Propellant Explosions Resulting from Crew Launch Vehicle Tank Failure

“…Results from these analyses and simulations are quantitatively inserted into the PRA; they also provide improved understanding of the failure response of the system and help guide future design and accident response decisions. 2 American Institute of Aeronautics and Astronautics This paper represents work being done in the SARA project to assess a specific failure resulting from a catastrophic disintegration during ascent of the LH 2 -LOX tank and the subsequent release of the bulk propellants into the atmosphere. The problem involves the interaction at the interfaces between the LH 2 and LOX and the surrounding high-speed air, the deformation of the liquid interfaces due to mixing, the vaporization of the liquids, and, finally, the potential combustion of the vapor leading to a possible fireball explosion.…”