A Rational Approach for Calculation of Heat Transfer in Diesel Engines

This paper proposes a new equation for calculating instantaneous heat transfer in internal combustion engines. The equation constitutes expressions of heat transfer due to convection, and gas and flame radiation. In the term for convective heat transfer three sets of parameters appear: operating parameters (pressure in the combustion chamber, mean piston speed, gas temperature), an engine parameter (equivalent diameter of the cylinder), and a constant that takes swirl velocities (at the time when combustion starts) into account. Consideration of gas radiation and data obtained on flame radiation make the equation broadly complete, scientifically sound, and universally applicable.