| 船用柴油机排气冷却消声器总体性能研究 |
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| 引用本文： | 郭小林,季振林. 船用柴油机排气冷却消声器总体性能研究[J]. 哈尔滨工程大学学报, 2009, 30(5). DOI: 10.3969/j.issn.1006-7043.2009.05.009 |
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| 作者姓名： | 郭小林 季振林 |
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| 作者单位： | 哈尔滨工程大学动力与能源工程学院,黑龙江,哈尔滨,150001;哈尔滨工程大学动力与能源工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 排气冷却消声器是降低船用柴油机排气温度和排气噪声的有效装置.针对排气冷却消声器内部结构复杂,薄层环形通道多的特点,采用有限体积法计算并分析其内部流体流动和温度场,在此基础上使用有限元法计算并分析其声学特性.计算结果表明,消声器内部流场多处存在漩涡,在气流转折处设置导流环可以有效改善流体流动特性;消声器内部温度随气流的流向逐渐降低,消声器的冷却效果良好.由于温度的降低,声波在介质中的传播速度也随之降低,消声器的传递损失曲线向低频方向移动.
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| 关 键 词： | 排气冷却消声器 冷却效果 阻力损失 消声特性 |
Overall performance of marine diesel engine exhaust cooling silencers |
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| GUO Xiao-lin,JI Zhen-lin. Overall performance of marine diesel engine exhaust cooling silencers[J]. Journal of Harbin Engineering University, 2009, 30(5). DOI: 10.3969/j.issn.1006-7043.2009.05.009 |
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| Authors: | GUO Xiao-lin JI Zhen-lin |
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| Affiliation: | College of Power and Energy Engineering;Harbin Engineering University;Harbin 150001;China |
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| Abstract: | Exhaust cooling silencers effectively reduce the exhaust gas temperature and exhaust noise of marine diesel engines.In view of the complicated internal structure and thin annular channels inside exhaust cooling silencers,the finite volume method was used to calculate the internal fluid flow and the temperature field,and then the finite element method was employed to calculate the acoustic attenuation characteristics of the silencer.The numerical results demonstrated that many eddies are generated inside the... |
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| Keywords: | exhaust cooling silencer cooling effect resistance loss acoustic attenuation characteristics |
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