Untersuchung des Wärmetransportes zwischen Kolben, Kolbenringen und Zylinderbüchse

Model tests of a marine diesel engine powered by a fuel-alcohol mixture

“… applying a smaller calculation step (currently all parameters are counted every 0.1 crankshaft rotation),  clarification of the heat transfer calculations between the medium and the cylinder walls (now the heat transfer is being modeled. The use of Woschni [7,8] and Bulaty [1] dependencies in the case of the conducted research resulted in significant errors,  development of an analytical method for calculating the ignition delay for the mixtures used. The applied method of calculating the release of heat (the heat flux is supplied to the cylinder along with the injected fuel) does not take into account the delay in ignition of the fuel-air mixture (for the needs of the model, this parameter was selected on the basis of empirical tests),  increasing the repeatability of the test conditions (repeatability of the torque load and rotational speed of the crankshaft).…”

The effect of piston ring design on conformability in highly thermally and mechanically loaded engines

“…Piston rings substantially contribute to the cooling of the piston by absorbing heat from the piston and transferring it to the cylinder wall [5]. If this state is not achieved, the points of contact force on each of the gap ends are highly concentrated, resulting in a weakness of radial pressure next to the gap ends, which in turn can lead to sealing failure.…”

Energy loss from closed combustion systems

“…[1][2][3][4][5]). Especially prominent in this field are the multifarious publications of Woschni [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Of particular significance to our studies were the contributions of Greif and his associates [20][21][22][23][24][25][26].…”