Nonlinearly-corrected Large Eddy Simulation for accurately evaluating both thermal efficiency and pollutant emissions in various types of engines and reactors

We here propose a new nonlinear numerical method of global correction for accurately evaluating fluid-dynamic instability, thermal efficiency, and pollutant emissions in large eddy simulation and direct numerical simulation of subsonic and supersonic flows of power systems including combustion engines. Emphasis is also placed on the fact that, even though a very small amount, unrealistic non-zero density of fuel obtained by traditional computational methods with the linear correction or without any correction results in numerical errors of pollutant emissions such as hydrocarbon (HC) at order of ppm. Then, this new nonlinear method of correction also targets precise evaluation of thermal efficiency proportional to total amount of CO2 exhausted.