两用燃料发动机噪声源特性的试验研究

丁加岑; 郝志勇; 郑旭; 张焕宇; 张庆辉; 刘功文

doi:10.13433/j.cnki.1003-8728.2015.1221

两用燃料发动机噪声源特性的试验研究

doi: 10.13433/j.cnki.1003-8728.2015.1221

1.
浙江大学能源工程学系, 杭州 310027

基金项目:

"十二五"国家科技支撑计划重点项目(2011BAE22B05)资助

详细信息

作者简介:
丁加岑(1989-),硕士,研究方向为内燃机噪声控制及活塞动力学特性研究,dingjiacen19891028@163.com

通讯作者:
郝志勇(联系人),教授,博士,haozy@zju.edu.cn

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- 文章访问数: 126
- HTML全文浏览量: 32
- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 2014-02-24
- 刊出日期: 2015-12-05

Experimental Study of Noise Source Identification of a Dual Fuel Engine

1.
Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China

摘要

摘要: 以一台车用4缸汽油压缩天然气(CNG)两用燃料发动机为研究对象进行噪声源识别,测试工况为怠速工况、最大转矩工况与最大功率工况。首先测试发动机的1 m声压级,定位噪声最大的端面为发动机前端,再使用基于波束形成技术的声阵列系统对发动机前端和进气侧进行分析,分析结果表明汽油与CNG燃料主要噪声频段均位于1 000~2 000 Hz,进而识别出主要噪声源为链壳,通过振动测试验证了噪声源,并对两种燃料的噪声源特点进行了比较。研究表明波束形成技术在噪声源识别中具有快捷、直观的优点;两用燃料发动机CNG燃料怠速噪声较汽油燃料各对应面大5~7 dB,250 Hz以下的燃烧噪声是主要成因。
- 波束形成 /
- 两用燃料发动机 /
- 噪声源识别 /
- 链壳 /
- 振动测试 /
- 噪声特性 /
- 噪声控制
Abstract: An experimental study of the noise source identification of a 4-cylinder dual-fuel engine based on beamforming technology was presented. The experiment uses idle conditions, maximum torque conditions and maximum power conditions. Firstly, the noise pressure level measurement shows that the noisiest surface was in the front of the engine. Secondly the main noise sources were identified with a beamformer array. The experimental results showed that the major noise source in 1 000~2 000 Hz was the chain cover both in gasoline fuel and CNG fuel. Vibration analysis was done to verify the experimental results. Additionally, the characteristics of noise sources of the two types of fuel were compared. This study shows that the beamforming technology in the noise source identification is fast. The noise of CNG fuel is 5~7 dB bigger than that of gasoline fuel in the idle condition because the combustion noise is below 250 Hz.
- automobile engines /
- beamforming /
- design of experiments /
- experiments /
- identification (control systems) /
- measurements /
- noise abatement

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参考文献(15)

[1]	秦树珍,王子玉,吴佩珊,等.生物制气-柴油双燃料发电机组噪声测量分析[J].拖拉机与农用运输车,2009,36(1):60-62 Qin S Z, Wang Z Y, Wu P S, et al. Study of noise test of biogas-diesel dual fuel generator[J]. Tractor & Farm Transporter, 2009,36(1):60-62 (in Chinese)
[2]	秦树珍.双燃料发动机及柴油机噪声测试分析[D].镇江:江苏大学,2009 Qin S Z. Noise analysis of dual fuel engine and diesel engine[D]. Zhenjiang: Jiangsu University, 2009 (in Chinese)
[3]	张景海,王云鹏,隗海林,等光.两用燃料汽车的振动噪声特性[J].吉林大学学报(工学版),2005,35(1):29-33 Zhang J H, Wang Y P, Kui H L, et al. NVH performance of convertible-fuel vehicle[J]. Journal of Jilin University (Engineering and Technology Edition), 2005,35(1):29-33 (in Chinese)
[4]	汤东,来超峰,胡正权,等.生物制气-柴油双燃料发动机的燃烧噪声[J].江苏大学学报(自然科学版),2006,27(5):409-412 Tang D, Lai C F, Hu Z Q, et al. Combustion noise of biogas-diesel dual fuel engine[J]. Journal of Jiangsu University (Natural Science Edition), 2006,27(5):409-412 (in Chinese)
[5]	汤东,沈飞,来超峰,等.双燃料发动机燃烧噪声特性及影响因素分析[J].农业机械学报,2008,39(11):18-21 Tang D, Shen F, Lai C F, et al. Characteristics and affecting factors of combustion noise in dual-fuel engine[J]. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(11):18-21 (in Chinese)
[6]	袁银南,罗福强,梁昱,等.生物制气-柴油双燃料发动机燃烧噪声分析[J].农业机械学报,2008,39(5):18-21 Yuan Y N, Luo F Q, Liang Y, et al. Analysis on combustion noise of biogas diesel dual-fuel engine[J]. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(5):18-21 (in Chinese)
[7]	Elnajjar E, Selim M Y E, Omar F. Effect of dual fuel engine parameters and fuel type on engine noise emissions[C]//Proceedings of the ASME 2010 10th biennial Conference on Engineering Systems Design and Analysis. Istanbul, Turkey: American Society of Mechanical Engineers, 2010
[8]	Christensen J J, Hald J. Technical review, Beamforming[Z]. Bruel & Kjaer Sound and Vibration Measurements, 2004
[9]	Kirkeb J E, Austeng A. Improved beamforming using curved sparse 2D arrays in ultrasound[J]. Ultrasonics, 2007,46(2):119-128
[10]	van Veen B D, Buckley K M. Beamforming: A versatile approach to spatial filtering[J]. IEEE ASSP Magazine, 1988,5(2):4-24
[11]	Bai M R, Lee J. Industrial noise source identification by using an acoustic beamforming system[J]. Journal of Vibration and Acoustics, Transactions of the ASME, 1998,120(2):426-433
[12]	褚志刚,杨洋,王卫东,等.基于波束形成方法的货车车外加速噪声声源识别[J].振动与冲击,2012,31(7):66-70 Chu Z G, Yang Y, Wang W D, et al. Identification of truck noise sources under passby condition based on wave beamforming method[J]. Journal of Vibration and Shock, 2012,31(7):66-70 (in Chinese)
[13]	Khatami I, Berry A. Source localization of aircraft engines with circular microphone arrays[C]// Canadian Acoustic Conference, Canadian Acoustical Association, Ottawa, Canada, 2011
[14]	杨洋,倪计民,褚志刚,等.基于互谱成像函数波束形成的发动机噪声源识别[J].内燃机工程,2012,33(3):82-87 Yang Y, Ni J M, Chu Z G, et al. Engine noise source identification based on cross-spectra imaging function beam-forming[J]. Chinese Internal Combustion Engine Engineering, 2012,33(3):82-87 (in Chinese)
[15]	郝志勇,刘月辉,毕凤荣,等.乘用车柴油机噪声源识别方法的试验研究[J].内燃机学报,2004,22(2):150-154 Hao Z Y, Liu Y H, Bi F R, et al. Experimental study on the noise source identification of a diesel engine of passenger car[J]. Transactions of CSICE, 2004,22(2):150-154 (in Chinese)