Numerical Simulation of Combustion Flows in Dual-fuel Combustor

In order to study the performance of dual-fuel combustor in gas turbine, combustion flows were simulated. The turbulence was solved by the RNG k - epsilon two-equation model, the reaction was settled by the simple chemical reacting system (SCRC) of the infinitely fast chemical reaction assumption and the beta probability density function (PDF) without the intermediate reactions, and the use physical nozzle for oil-fuel was simulated by the atomizer model. The characteristic parameters of the non-premixed combustion flows between the oil fuel and the pyrolysis gas, such as pressure, temperature and velocity etc, were analysed with FLUENT. And the pollution of NOx was simulated in the combustion processes. The results show that: there is a lower peak temperature, a better uniformity of temperature in outlet, a lower NOx emission with pyrolysis gas fuel.