Analysis of flow field characteristics and structure optimization of the split-stream rushing muffler for diesel engine
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Published:2020-01-20
Issue:1
Volume:68
Page:101-111
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ISSN:0736-2501
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Container-title:Noise Control Engineering Journal
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language:en
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Short-container-title:noise cont engng j
Author:
Su He1,
Wu Pei1,
Xue Jing1,
Zhang Yongan1,
Zhang Haijun1
Affiliation:
1. School of Mechanical & Electrical Engineering, Inner Mongolia Agricultural University, Engineering Technology Research Center of Intelligent Equipments on Prataculture and Aquaculture of Inner Mongolia Autonomous Region
Abstract
In order to analyze the flow field characteristics of the split-stream rushing muffler, a theoretical model describing the velocity of the split streams is established and verified by the tracer test. For this new-principle muffler, the acoustic performance and the relationship between
the velocity drop of the airflow and the pressure field are analyzed, also the structure optimization of the muffler is carried out based on the orthogonal test. Finally, a new muffler is fabricated based on the designing theory of this type of muffler for a prototype of diesel engine, and
the comparative analyses are conducted compared with its original muffler. The results show that the establishment and analysis of the theoretical model for velocity during the split-streams rushing process are correct. In the frequency range of 0â–“1000 Hz, the average transmission
loss of split-stream rushing muffler is better than that of the original muffler. While the speed of airflow is reduced by split-streams rushing, a certain pressure loss is caused at the same time, which is about 50% of total pressure loss of the muffler, and the average fluid resistance coefficient
of the split-stream rushing process is 0.91. Compared to the original muffler of the sample engine, the average insertion loss of the optimized new muffler is increased by 61.2%. At inlet air velocity of 30 m/s, the pressure loss is reduced by 16.8%. The results provide a potential for practical
engineering application of this new split-stream rushing muffler in future.
Publisher
Institute of Noise Control Engineering (INCE)
Subject
Industrial and Manufacturing Engineering,Public Health, Environmental and Occupational Health,Mechanical Engineering,Acoustics and Ultrasonics,Aerospace Engineering,Automotive Engineering,Building and Construction
Cited by
1 articles.
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