| Virtual design and performance prediction of a silencing air cleaner used in an I.C. engine intake system |
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| 作者姓名： | 郝志勇 贾维新 方芳 |
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| 作者单位： | College of Mechanical and Energy Engineering，Zhejiang University，Hangzhou 310027，China，College of Mechanical and Energy Engineering，Zhejiang University，Hangzhou 310027，China，Tianjin Internal Combustion Engine Research Institute，Tianjin University，Tianjin 300072，China |
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| 基金项目： | ProjectsupportedbythePh.DProgramsFoundationofMinistryofEducation,China |
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| 摘 要： | INTRODUCTION The primary function of an intake system is firstly to efficiently channel fresh air to the engine,and secondly to minimize intake noise emissions.There are a number of current approaches for devel-oping a more realistic method to improve intake sys-tem design.The objectives include more effective silencing performance to meet increasingly severe legislative targets for reduced noise on the one hand,with optimized engine performance and fuel economy accompanied by improvements…
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| 关 键 词： | 虚拟设计 声学性能 噪音抑制 边界元素法 |
| 收稿时间： | 2005-01-17 |
| 修稿时间： | 2005-05-12 |
Virtual design and performance prediction of a silencing air cleaner used in an I.C. engine intake system |
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| Hao Zhi-yong,Jia Wei-xin,Fang Fang.Virtual design and performance prediction of a silencing air cleaner used in an I.C. engine intake system[J].Journal of Zhejiang University Science,2005,6(10):1107-1114. |
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| Authors: | Hao Zhi-yong Jia Wei-xin Fang Fang |
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| Institution: | (1) College of Mechanical and Energy Engineering, Zhejiang University, 310027 Hangzhou, China;(2) Tianjin Internal Combustion Engine Research Institute, Tianjin University, 300072 Tianjin, China |
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| Abstract: | This paper reports results of the authors' studies on the virtual design method used in the development of low noise intake system of I.C. engine. The resulting high pass-by noise at level above the legislative target at full throttle when engine speed was around 5200 r/min necessitated a BEM-aided redesign task, following the typical process of design and development of an intake system. During the initial design, based on the acoustic theory and the requirements (1. The air flux of the redesigned should equal to or exceed the value of the original flux; 2. The filtering area must not be degraded), and considering the constraint of space in the engine compartment, total volume and rough internal dimensions were determined. During the detailed design, the exact internal dimensions of the air cleaner were determined, and an effective method was applied to improve the acoustic performance at low frequency. The predicted sound power of the intake system indicated that the objective of reducing the overall engine noise by minimizing intake system noise was achieved. |
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| Keywords: | Virtual design Acoustic performance Silencing air cleaner Boundary element method (BEM) |
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