Experimental Study of the Pore Density on the Mesh Partition of Exhaust Muffler on Diesel Engine Performance

Abstract

In order to improve the acoustic attenuation performance of agricultural diesel engine exhaust muffler, take the 175 series air-cooled diesel engine as the example. Based on the original exhaust muffler structure and kept the same size of mesh partition aperture and mesh radial distribution, the four groups of different pore density schemes (14 pores/cm2,19 pores /cm2,10 pores /cm2,15 pores /cm2) are designed. The laboratory measurements are used to research the influence of different pore density exhaust muffler effect on the acoustic attenuation performance of the diesel engine. The tests indicated that the No.4 scheme did not increase the power loss, meanwhile, improved the performance of exhaust muffler noise reduction effectively, and the amount of noise elimination increased about 2~4dB(A), which provide theoretical basis for further research of performance optimization of the exhaust muffler.