Abstract
Keywords- Radiant Heat Exchange, Cyclic Losses, Semitransparent Heat-Insulating Coatings, Scattering and Absorption Indexes, Surface and Subsurface Temperature
Radiant heat exchange processes under intensive near infrared radiation (q0 ~ 1MW/m2) in the combustion chamber (CC) of high speed diesel engines is considered during one cycle and repeated cycles. The improved distributions of temperature due to volumetric radiant heat losses inside the semitransparent heat-insulating coatings (SHIC) are discussed. These distributions can show subsurface temperature maximum. The mathematical and physical simulation of the absorbed and scattering radiant heat flux by SHIC (1 mm in thickness) is analyzed. It is shown that these coatings can accumulate penetrating radiant heat of the total thermal flux during the "hot" phase (the compression stroke) and then act as a heat source in the rest part of the cycle.