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《Journal of Shaoyang University(Natural Science Edition)》 2018-01
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Study on the Flow Field Characteristics of Agricultural Single-cylinder Diesel Engine Exhaust Muffler

FU Jun;ZHANG Zengfeng;CHEN Wei;School of Mechanical and Energy Engineering,Shaoyang University;  
Taking agricultural single-cylinder diesel engine exhaust muffler as the research object,the velocity and pressure distribution of the flow field were calculated in the finite volume method.The result showed that the turbulence phenomenon with the degree of airflow velocity changes and air velocity had a close relationship.Inlet pipe easily produced high-pressure area,and the corresponding stress changed greatly.The flow filed characteristics with various parameters of structure factors(bulkhead perforation rate T,ratio of long to short half axises N,ratio of length to diameter L/D) were studied:a low velocity zone was produced between inlet pipe and the bulkhead in each scheme.The pressure loss which was produced with the change of bulkhead perforation rate was higher than the changes of ratio of long to short half axises and ratio of length to diameter produced.It suggested that if one of the original muffler structure factor changed without causing overall size changes,the smaller change of the pressure loss of muffler would be variabled,vice versa.
【Fund】: 湖南省教育厅优秀青年项目(16B235);; 湖南省研究生科研创新项目(CX2016B686);; 邵阳学院研究生科研创新项目(CX2016SY016)
【CateGory Index】: S218.5
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