| 反相对冲柴油机排气消声器声学特性 |
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| 引用本文： | 邵颖丽,武佩,韩宝生,马彦华,赵志文.反相对冲柴油机排气消声器声学特性[J].内燃机学报,2012(1):67-71. |
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| 作者姓名： | 邵颖丽 武佩 韩宝生 马彦华 赵志文 |
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| 作者单位： | 内蒙古农业大学机电工程学院;内蒙古财经学院统计数学学院 |
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| 基金项目： | 内蒙古自治区教育厅资助项目(NJzy08110);国家自然科学基金资助项目(11164021) |
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| 摘 要： | 针对柴油机传统排气消声器中低频消声性能差,排气背压高的问题,提出了一种基于反相对冲的新型消声原理.对基于新型原理消声单元的消声特性进行了理论建模,建立了其消声性能与结构参数间的关系.为了验证上述原理的正确性,以CG25型单缸柴油机为样机,设计试制了3种不同参数的反相对冲消声器.对安装3种消声器、5种转速下柴油机排气噪声的总A声级、倍频程声压级及详细频谱进行了测试分析,并与不装消声器及样机原装传统排气消声器下的排气噪声进行了比较分析,初步验证了该消声原理的正确性.
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| 关 键 词： | 柴油机 消声器 反相 对冲 |
Acoustic Characteristics of Out-of-Phase and Split-Stream Rushing Muffler for Diesel Engine |
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| SHAO Ying-li,WU Pei,HAN Bao-sheng,MAYan-hua,ZHAO Zhi-wen.Acoustic Characteristics of Out-of-Phase and Split-Stream Rushing Muffler for Diesel Engine[J].Transactions of Csice,2012(1):67-71. |
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| Authors: | SHAO Ying-li WU Pei HAN Bao-sheng MAYan-hua ZHAO Zhi-wen |
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| Affiliation: | 1(1.School of Mechanical & Electrical Engineering,Inner Mongolia Agricultural University,Huhhot 010018,China;2.Department of Statistic Mathematics,Inner Mongolia Finance and Economics College,Huhhot 010051,China) |
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| Abstract: | To solve the problems of poor noise reduction in low-frequency domain and high exhaust resistance of traditional exhaust muffler,a new concept of engine exhaust muffler is proposed based on out-ofphase noise elimination and split-stream rushing.A mathematical model of the muffler for the new concept was established,and the relationship between performance and structural parameters is obtained.Three new mufflers with different parameters were designed and manufactured to test the consideration in a single-cylinder diesel engine.The sound level pressure dB(A),octave-band sound pressure level as well as detailed spectrum of exhaust noise of the tested diesel engine at five different speeds with three mufflers were measured and compared with that without muffler and with original muffler.The correctness of muffler principle is verified. |
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| Keywords: | diesel engine muffler out-of-phase split-stream rushing |
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