PARAMETRIC STUDIES OF A FOUR-STROKE DIESEL ENGINE ON DIGITAL COMPUTER.

This paper concerns parametric studies of a diesel engine carried out with the help of a comprehensive computer program called 'Engine', written in Fortran IV. The program includes both the closed and open cycles and was used to study the effect of a number of parameters on the performance of two naturally aspirated, medium sized diesel engines in the range 100-175 hp available in the laboratory. To strike a proper balance between complexity and accuracy, one-dimensional compressible flow and short inlet and exhaust pipes were assumed. Empirical relations for heat transfer, friction and heat release were used. Computed and experimental power outputs were compared. As a by-product, information about the thermodynamics of the cycle was also obtained.