Abstract: A system is provided for directing a flow of gas, including a launching mechanism, a plenum, a layer of meltable material, and an open-ended uptake component. The launching mechanism is adapted to expel rocket exhaust gas. The plenum includes an upper portion having at least one fire resistant breachable plug. The upper portion is adjacent to the launching mechanism. The layer of meltable material is disposed on the upper portion. The heat generated by the gas melts the layer of meltable material. The open-ended uptake component operatively connects to the plenum. The plug moves onto a lower portion of the plenum due to force generated by the gas onto the plug, and the gas flows through the plenum and the uptake component to vent said gas in a controlled manner.

Abstract: A system is provided for directing a flow of gas, including a launching mechanism, a plenum, a layer of meltable material, and an open-ended uptake component. The launching mechanism is adapted to expel rocket exhaust gas. The plenum includes an upper portion having at least one fire resistant breachable plug. The upper portion is adjacent to the launching mechanism. The layer of meltable material is disposed on the upper portion. The heat generated by the gas melts the layer of meltable material. The open-ended uptake component operatively connects to the plenum. The plug moves onto a lower portion of the plenum due to force generated by the gas onto the plug, and the gas flows through the plenum and the uptake component to vent said gas in a controlled manner.

Abstract: A method is provided for predicting thermal energy transfer from an entrained particle to a wall surface, the entrained particle being incorporated within a computational fluid dynamics (CFD) model of a flow scenario. Initially, the method generates grid geometry for the CFD model to form a plurality of finite element cells; and establishes initial and boundary conditions for the flow scenario. The model determines a characteristic particle size of the entrained particle; inserts the particle into a cell at an initial location; initializes physical conditions of the particle as a particle state; and calculates a time-step based on characteristic cell size and flow velocity. The model integrates state change in the particle state over the time-step in the cell; and computes collision effect in response to the particle crossing a face of the cell. After convergence, the model quantifies energy flux to the wall surface from impingement by the particle.