Abstract
Piston internal combustion engines (ICE) are the most widespread sources of energy among heat engines. The ICEs are widely used as power installations on road transport. Nowadays, most of the ICEs are equipped with the boost-pressure charge system. Thermal and mechanical improvement of processes in intake system largely affects the efficiency of piston engines. The paper proposes a method of stabilization of pulsing flows in the intake system by the installation of the equalizing frame in the output channel of the turbocharger (TC). Investigations were carried out on an experimental installation that consisted of single-cylinder engine (8.2/7.1) and boost-pressure charge system (ТКR-6). Determination of instantaneous values of air flow speed and local heat transfer coefficient was conducted by the use of constant-temperature heat loss anemometer with an original design. It is established that the presence of the equalizing frame in the intake system leads to the decrease of turbulence level up to 25 % in comparison with the basic intake system (with preservation of metering characteristics). It is shown that the installation of the equalizing frame in the intake system of the ICE with TC also leads to the decrease in heat transfer intensity up to 15 % in comparison with the basic system. As a result, the authors determined values of breakdown intensity and probability of failure-free operation of engine with basic and modernized intake system.
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