One-dimensional model of flow and heat transfer of supercritical hydrocarbon fuel

Considering the mutual influence between fuel flow and heat transfer process and pyrolysis reaction and coking process in horizontal circular tube, a one-dimensional steady-state model was proposed to study the coupling characteristics of hydrocarbon fuel flow and heat transfer process and pyrolysis reaction. n-decane was chosen as the alternative fuel, pyrolysis reaction used one-step chemical reaction model and coking process used a one-dimensional coking engineering model for numerical simulation. The overall results showed that the pyrolysis reaction can strengthen heat transfer, and different wall heat flux, inlet pressure and mass flow rate were chosen to simulate the typical working conditions. The overall results showed that flow and heat transfer process influenced fuel's pyrolysis reaction rate and dwell time in the tube, thus affecting pyrolysis ratio. The comparisons of the calculated results with the experimental data show the reliability of the program, which can be applied to swift engineering calculation combined with the advantage of high calculation efficiency, and will provide a support for three-dimensional numerical simulation.