SIMULATION OF THE FLOW OF A GASEOUS HYDROCARBON COMPOUND AND ITS THERMODESTRUCTION IN A HEAT-LOADED CHANNEL OF LARGE LENGTH

A two-dimensional mathematical model is proposed for calculating the parameters of a nonequilibrium flow of a gaseous hydrocarbon compound in a heat-loaded cylindrical channel of large length on the basis of the system of Navier-Stokes equations for a multicomponent mixture of heat-conducting viscous gases with a reduced mechanism of chemical kinetics. On the basis of processing of the results of calculations by this model, an integral one-dimensional mathematical model of a viscous flow of a gaseous hydrocarbon compound decomposed in an endothermic gross reaction, allowing one to perform a large number of computer calculations for a minimum time, has been developed. The results of calculations of the nonequilibrium flow of a gaseous hydrocarbon compound in a channel of large length by these models were compared with experimental data. Results of a parametric investigation of the cooling of channels having a large length by gaseous hydrocarbons in different regimes of their flow in them and at different heat loads on the channel walls are presented. The mathematical models developed and the data obtained with them can be used for estimating the efficiency of cooling of the channels of process installations and power plants by gaseous hydrocarbon compounds.