Computational study of influence of inflow port channel design on spark-ignition natural gas engine parameters

Abstract

Resistance is The article presents the results of the research of a charge swirl motion influence on working process, engine parameters and NOx emissions of a spark ignition premixed natural gas engine. The charge swirl motion was organized by tangential inflow channel. The engine work process research was performed using numerical modeling of physical and chemical processes in combustion chamber. The turbulent flow in combustion chamber, spark ignition and combustion of gas fuel were simulated. The simulation shows that a tangential channel allowed organizing a swirl motion of charge and increasing turbulent kinetic energy of flow in the combustion chamber. Swirl motion greatly affects the combustion process. The increase in the turbulent kinetic energy to the spark timing made it possible to substantially reduce the combustion time of the fuel. Replacement of one original channel by a tangential channel allowed reducing emissions of nitrogen oxides NOx. Physical and chemical processes in combustion chamber were simulated in Ansys Forte.

The System of Informational Choice of the Kinematic Scheme for the Formation of Shells of a Complex Spatial Form

“…For the first kinematic scheme: a tightening of a cylindrical workpiece with an angle of engagement of the punch 900; bending of the part from 900 to 120 along the contour of the punch edge and stretching the part at an angle of 120; bending of the part without unloading along the molding contour of the punch with simultaneous extension of the part (Snegirev et al, 2016;Loktionova et al, 2016;Tribunskaia and Kozhukhov, 2017;Patsey and Galyshev, 2018).…”