Study on the Optimized Muffler with Function of PM Filtration for Non-Road Diesel Engines

Long Feng,Xiaotong Ma,Chao Shi,Xiang Wen,Lizhuang Dou,Xiude Hu,Mingfei Mu,Bisheng Chen

doi:10.3390/atmos13020350

Abstract

With a high thermal efficiency, high reliability and good fuel economy, diesel engines have been widely used. However, with the increasingly stringent standards regarding non-road diesel engine emissions, diesel engines can hardly satisfy the particle emission requirements through internal purification alone. To reduce the particle emission and noise levels of the non-road diesel engine R180, this paper optimized the original muffler, and endowed the muffler with a particulate matter (PM) filtering function to improve the muffling. This study first proposed stainless steel fiber as the filtering medium as it is inexpensive and accessible; a bench experiment was conducted to verify the particle filtration performance and its effect on the overall engine performance. Then, the structure of the existing muffler in non-road diesel engines R180 was optimized, and the stainless steel fiber filtering was integrated. The internal flow field of the optimized muffler was obtained in the computational fluid dynamics software FLUENT, and the acoustic and filtration performance was studied. The experimental and simulation results indicated that the optimized muffler could achieve both particle filtration and noise reduction.

Highlights

IntroductionWith the rapid development of the economy in China over the last 40 years, environmental problems caused by the massive consumption of energy have occurred [1,2].Among these issues, the problem of atmospheric compound pollution characterized by particulate matter (PM) has attracted much attention from the government and public [3,4,5].To alleviate air pollution problems, the government has adopted a series of air pollution prevention and control policies [6], including formulating ultralow emission standards for coal-fired power plants, reducing outdated production capacity, strengthening industrial emission standards, phasing out small-scale high-emission factories, installing volatile organic compound (VOC) emission control facilities, eliminating small coal-fired industrial boilers, applying electricity and natural gas to replace domestic coal burning, raising motor vehicle emission standards, and discontinuing old motor vehicles
R180diesel diesel engine commonly applied in agriculture stainless steelsteel fibers werewere employed as a as filter medium to trap emitted diesel-related and stainless fibers employed a filter medium to trap emitted diesel-related
It was found that the installation of steel fibers could increase the exhaust temperature and fuel consumption under the same working conditions

Summary

Introduction

With the rapid development of the economy in China over the last 40 years, environmental problems caused by the massive consumption of energy have occurred [1,2].Among these issues, the problem of atmospheric compound pollution characterized by particulate matter (PM) has attracted much attention from the government and public [3,4,5].To alleviate air pollution problems, the government has adopted a series of air pollution prevention and control policies [6], including formulating ultralow emission standards for coal-fired power plants, reducing outdated production capacity, strengthening industrial emission standards, phasing out small-scale high-emission factories, installing volatile organic compound (VOC) emission control facilities, eliminating small coal-fired industrial boilers, applying electricity and natural gas to replace domestic coal burning, raising motor vehicle emission standards, and discontinuing old motor vehicles. With the rapid development of the economy in China over the last 40 years, environmental problems caused by the massive consumption of energy have occurred [1,2]. Among these issues, the problem of atmospheric compound pollution characterized by particulate matter (PM) has attracted much attention from the government and public [3,4,5]. The emissions of non-road mobile machinery have increasingly become prominent. The “Technical Guidelines for the Compilation of Non-road Mobile Source Emission

Methods

Results

Conclusion