2013
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Browsing 2013 by Author "Khomenko, Irina Yu."
Item Mathematical Modeling of Unsteady Heat Exchange in a Passenger Car(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2013) Khomenko, Irina Yu.EN: Purpose. Existing mathematical models of unsteady heat exchange in a passenger car do not satisfy the need of the different constructive decisions of the life support system efficiency estimation. They also don’t allow comparing new and old life support system constructions influence on the inner environment conditions. Moreover quite frequently unsteady heat exchange processes were studied at the initial car motion stage. Due to the new competitive engineering decisions of the life support system the need of a new mathematical instrument that would satisfy the mentioned features and their influence on the unsteady heat exchange processes during the whole time of the road appeared. The purpose of this work is creation of the mathematical model of unsteady heat exchange in a passenger car that can satisfy the above-listed requirements. Methodology. For the assigned task realization system of differential equations that characterizes unsteady heat exchange processes in a passenger car was composed; for the system of equations solution elementary balance method was used. Findings. Computational algorithm was developed and computer program for modeling transitional heat processes in the car was designed. It allows comparing different life support system constructions influence on the inner environment conditions and unsteady heat exchange processes can be studied at every car motion stage. Originality. Mathematical model of unsteady heat exchange in a passenger car was improved. That is why it can be used for the heat engineering studying of the inner car state under various conditions and for the operation of the different life support systems of passenger cars comparison. Mathematical modeling of unsteady heat exchange in a passenger car was made by the elementary balance method. Practical value. Created mathematical model gives the possibility to simulate temperature changes in passenger car on unsteady thermal conditions with enough accuracy and to introduce and remove additional elements to the designed model. Thus different constructive decisions of the life support system can be estimated by the mathematical experiment.