mprovement of the Working Process of Aviation Piston Engine using a Fractal Combustion Model
The features of the work of aviation piston engines are considered. Preferential engine operation modes are defined. A mathematical model includes a fractal combustion model, which allowed in the first approximation to consider the combustion chamber geometry and the spark plug position. A procedure for calibrating a fractal model was proposed. On the basis of experimental data, coefficients were obtained on various modes of operation. For the engine under consideration, a problem with a lack of power on the take-off mode due to the unevenness of the workflow in the cylinders is revealed. Ways to solve the indicated problem are outlined, including ensuring the uniformity of the mixture composition over cylinders, changing the phases of the gas distribution and updating the design of the intake receiver. As a result, it was possible to reduce the difference in maximum pressures in the cylinders, to achieve the required power on the take-off mode and determine the possibilities for further engine forcing.