A simulation method for coking process of hydrocarbon fuel regenerative cooling based on CFD

Abstract

The application discloses a simulation method of a carbon hydrogen fuel regenerative cooling coking process based on CFD, and belongs to the field of active thermal protection of hypersonic aircrafts. The simulation method comprises the following steps: carbon hydrogen fuel is replaced by n-decane, a coking process of the carbon hydrogen fuel comprises catalytic coking and aromatic cluster coking, and a secondary cracking model of n-decane is adopted for simulation and adaptation of the coking process. A two-dimensional circular tube geometric model is adopted, a suitable model and a solver are selected in ANSYS Fluent, relevant physical properties and boundary conditions are defined, and steady-state calculation is carried out; the steady-state calculation result is used as an initial condition of a transient coking process, and a dynamic accumulation process of a coking layer is realized through a dynamic mesh technology in ANSYS Fluent. The application belongs to direct simulation of coking, realizes simulation of accumulation and growth of the coking layer, and can be used for evaluating the influence of coking on the flow heat exchange performance of the regenerative cooling fuel, thereby providing a reference for subsequent optimization and improvement of the regenerative cooling.

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