Stationary gas dynamics and heat transfer of flow in exhaust pipelines with different cross section shape (applied to piston engines)


Аuthors

Plotnikov L. V.1*, Komarov O. V.1, Nedoshivina T. A.1, Savin M. A.2

1. Ural Federal University named after the first President of Russia B.N. Yeltsin, 19, Mira str., Ekaterinburg, 620002, Russia
2. Ural Institute of the State Fire Service of the Ministry of the Russian Federation for Civil Defense, Emergency Situations and Disaster Relief, Yekaterinburg, Russia

*e-mail: leonplot@mail.ru

Abstract

The article considers the influence of the pipeline cross-sectional shape impact on the stationary flows aerodynamics, gas-dynamic structure and heat transfer of in the cylinder and exhaust system of a piston engine at various air flow rates. It has been found that the cross-sectional shape of the exhaust pipeline has virtually no effect on the flow distribution inside the cylinder. The flow structure in both square and triangular pipelines has significant differences from the circular configuration. The authors revealed reduction in the flow turbulence degree occurrence in the exhaust system by 36 % while profiled pipes application, and deetermined that application of the square and triangular pipes causes the heat transfer coefficient decrease in the exhaust system by up to 34 %.

Keywords:

piston engine, exhaust system, flow structure, gas dynamics and heat transfer, square and triangular channels, experimental test bench

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