Abstract
KEYWORDS - Engine, Combustion Chamber, Impedance Materials, Low-Heat-Rejection, Heat-insulating Coatings
The concept radiant heat-regenerating effect in the combustion chamber (CC) of quasi adiabatic diesel engine is discussed. The effect is produced by using semitransparent heat-insulating coatings (SHIC) for CC internal walls of high-speed diesel engines. A mathematical modeling of temperature and radiant fields in SHIC has been carried out. The opportunity of formation of subsurface temperature maximum and positive gradient of temperature in SHIC is shown depending on an optimum relation of scattering, absorption indexes and coating thickness. Characteristics of SHIC as the accumulating impedance device, transforming absorbed radiant energy during a hot phase into conductive flux partially returned back in the combustion chamber are analyzed.