| 基于GT-Power和CFD的某发动机消声器结构优化与分析 |
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| 引用本文： | 梁永勤.基于GT-Power和CFD的某发动机消声器结构优化与分析[J].内燃机与配件,2021(5). |
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| 作者姓名： | 梁永勤 |
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| 作者单位： | 西藏职业技术学院 |
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| 基金项目： | 西藏自治区自然科学基金项目,Tibet Municipal Natural Science Foundation Project,项目编号:XZ2018ZRG-135;2018年西藏自治区自然学基金项目(项目名称:青藏高原地区低振动噪声发动机技术的研究与应用)阶段性成果。 |
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| 摘 要： | 针对某四缸发动机消声性能在某些工况下不理想的状况,本文通过在GT-Power中建立发动机及消声器耦合模型,同时联合使用CFD仿真,在不增大压力损失的前提下,对其消声器进行了优化。通过对消声器消声扩张比,扩张腔个数及长度,内插管长度的优化改进,提高了消声性能。结果表明:优化后的消声器在260-690Hz范围内,消声量平均提高了7dB,全频率范围内消声量减小了4dB,消声效果明显。
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| 关 键 词： | 消声器 扩张比 扩张腔 优化 |
Optimization and Analysis of an Engine Muffler Structure Based on GT-Power and CFD |
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| LIANG Yong-qin.Optimization and Analysis of an Engine Muffler Structure Based on GT-Power and CFD[J].Internal Combustion Engine & Parts,2021(5). |
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| Authors: | LIANG Yong-qin |
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| Affiliation: | (Tibet Vocational Technical College,Lhasa 850000,China) |
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| Abstract: | In view of the unsatisfactory performance of the noise reduction performance of a four-cylinder diesel engine under certain working conditions,this paper optimizes its muffler by establishing an engine mode in GT-Power without increasing pressure loss.By optimizing and improving the muffler expansion ratio,number and length of expan-sion cavities,the length of the inner cannula,the muffler performance has been improved.The results show that:in the range of 260-690Hz,the noise reduce 7dB on average,the noise reduction in the full frequency range is 4dB,the effect is obvious. |
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| Keywords: | muffler expansion ratio expansion cavity optimization |
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