РАЗРАБОТКА МАТЕМАТИЧЕСКОЙ МОДЕЛИ ДЕТОНАЦИИ В СОВРЕМЕННОМ ДВС

Abstract

The paper examines under-studied aspects of internal combustion engine management, suchas the use of knock. In knock, instead of a constant frontal flame, a detonation wave is formed inthe combustion zone, carrying at supersonic speed. Fuel and oxidant are detonated in compressionwave. This process, from the point of view of thermodynamics, increases the efficiency of the engine.In internal combustion engines, there are two different modes of combustion propagation ofair mixture fuel: deflagration and detonation. Engines operating in detonation combustion modeare currently not used and their capabilities are most interesting. Modern internal combustionengines do not carry the detonation mode well, but the possibility of short-term combustion of partof the fuel-air mixture with detonation is embedded in their design. The situation of detonation iscurrently constantly being studied, it is considered as a harmful component of the combustionprocess, which requires improvement of the engine, its control and use of modern fuel. It is proposedto use this, considered random, process to increase the torque and power of the internalcombustion engine. The possibility of using detonation combustion of fuel-air mixture in internalcombustion engine as a useful part of the working process is considered, and the possibility ofcontrolling combustion of fuel-air mixture in a mixed mode is assumed, which allows to improveindicator parameters. Assumptions have been made to create a model and the cylinder pressurehas been simulated during the combustion phase of the partially detonated fuel-air mixture. Themethod of heat generation calculation has been determined, which is one of the most importantstages of mathematical model creation, as this determines accuracy and adequacy of calculatedparameters, both for deflagration combustion modes of fuel-air mixture and using detonationcombustion. Proposed procedure for calculation of internal combustion engine operating cycleparameters makes it possible to carry out real-time calculations and account for influence of binaryfuel composition on parameters of power, economy, mechanical and dynamic load on parts ofcrank mechanism, as well as thermal load on engine.