1977-02-01

Modeling the Complete Otto Cycle-Preliminary Version 770223

A description is given of the equations and the computer program being developed to model the complete Otto cycle. The program incorporates such important features as: 1) heat transfer, 2) finite combustion rates, 3) complete chemical kinetics in the burned gas, 4) exhaust gas recirculation, and 5) manifold vacuum or supercharging. Changes in thermodynamic, kinetic and transport data as well as model parameters can be made without reprogramming. Preliminary calculations indicate that: 1) chemistry and heat transfer significantly affect composition and performance, 2) there seems to be a strong interaction among model parameters, and 3) a number of cycles must be calculated in order to obtain steady-state conditions.

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