Research on Aero Engine Emission Based on Combustion Chamber Size Optimization

Abstract

The emission of aero piston engines has been a focused problem. The combustion chamber size is of certain effect on engine emissions performance. A piston engine is taken as the object of study. Fire is used to establish a type of engine combustion chamber model from the perspective of combustion spray model. Improvement based on geometric parameters of existing combustion chamber are proposed; and simulation analysis is carried out under the new program; the nitrogen and oxygen compounds and carbon emissions between the old and new program are compared in a transient state. The results show that the emission of nitrogen and oxygen compounds under the new combustion chamber structure is reduced by 23%, the carbon emission is reduced by 2.8%, and the overall emission is decreased. After installing the modified combustion chamber into the engine and maintaining the engine power and torque unchanged, a reduction in emission is clearly shown, which proves that the design program is feasible.

Keywords

• piston engine
• combustion chamber
• geometric parameters
• emission
• bench test