| 柴油高压喷嘴内部的压力波动与不稳定空化现象分析 |
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| 引用本文： | 汪翔,苏万华. 柴油高压喷嘴内部的压力波动与不稳定空化现象分析[J]. 内燃机学报, 2010, 0(3) |
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| 作者姓名： | 汪翔 苏万华 |
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| 作者单位： | 天津大学内燃机燃烧学国家重点实验室; |
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| 基金项目： | 国家自然科学基金重点资助项目(50636040); 国家重点基础研究发展计划资助项目(2007CB210001) |
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| 摘 要： | 利用试验测量与三维数值模拟相结合的手段对一单孔柴油高压喷嘴中的压力波动,不稳定空化现象以及二者之间的关联进行了深入地考察。分析结果显示,该喷嘴内部的压力波动会随着喷射压力的提高而变得更为剧烈,其最大频率可达到40kHz。剧烈的压力波动对喷孔空化过程的演变有着重大的影响,压力波动所对应的压力变化率的大小可以作为评价喷孔空化程度强弱的一个重要指标。另外,喷孔空化流场不同空间点上的空化气泡动力特性差异明显,空间点越靠近喷孔出口,其对应的空化气泡动力特性越不稳定,也即对压力波动越敏感。
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| 关 键 词： | 柴油喷嘴 压力波动 不稳定空化 |
Analysis on Pressure Fluctuation and Unsteady Cavitation Inside High-Pressure Diesel Injection Nozzles |
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| WANG Xiang,SU Wan-hua. Analysis on Pressure Fluctuation and Unsteady Cavitation Inside High-Pressure Diesel Injection Nozzles[J]. Transactions of Csice, 2010, 0(3) |
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| Authors: | WANG Xiang SU Wan-hua |
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| Affiliation: | WANG Xiang,SU Wan-hua(State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Pressure fluctuations and unsteady cavitation within a single-hole diesel injection nozzle,together with combination between these two phenomena,were investigated thoroughly through experimental measurements and three-dimensional numerical modeling.Analysis results indicate that pressure in the diesel injection nozzle fluctuates more dramatically as the magnitude of injection pressure increases and maximum frequency of fluctuation even reaches 40 kHz.Sharp pressure fluctuations have a significant impact on ... |
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| Keywords: | Diesel injection nozzle Pressure fluctuation Unsteady cavitation |
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