BOUNDARY CONDITIONS FOR NUMERICAL CALCULATION OF GAS EXCHANGE IN PISTON ENGINES

An estimation of the effi ciency of the technique of setting boundary conditions with the use of gas-dynamical functions to numerically calculate the intake and exhaust processes in piston engines is made. Mathematical models have been developed for different engines, and joint calculations of nonstationary gas fl ow and of the process proceeding in the cylinder have been carried out. A comparison of the obtained results with experimental data has been made, and the adequacy of the mathematical description has been confi rmed.
   
Author:  Yu. A. Grishin, V. A. Zenkin, and R. N. Khmelev
Keywords:  piston engine, intake and exhaust processes, mathematical simulation, boundary conditions, Godunov′s method.
Page:  965