Numerical investigation on relationship between injection pressure fluctuations and unsteady cavitation processes inside high-pressure diesel nozzle holes
Numerical investigation on relationship between injection pressure fluctuations and unsteady cavitation processes inside high-pressure diesel nozzle holes
复制标题
高压柴油喷孔内喷油压力脉动与非定常空化过程关系的数值研究
DOI：
10.1016/j.fuel.2010.02.011
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发表时间：
2010-09
期刊：
影响因子：
7.4
通讯作者：
Wang, Xiang
中科院分区：
文献类型：
--
作者：
Su, Wanhua;Wang, Xiang
采用双流体方法对高压柴油机喷管内喷射压力波动与非定常空化过程的关系进行了数值分析。为了改进高压喷射条件下喷嘴孔空化含量的预测，通过分析空化泡动力学和喷嘴孔内部流动特性，建立了新的气泡数密度调整模型。模型验证结果表明，该模型适用于较大范围的柴油喷射压力。模拟结果表明，再循环区空化气泡及其尾流对上游压力变化的响应完全不同，空化含量的演变与上游压力的时间导数密切相关。
The relationship between injection pressure fluctuations and unsteady cavitation processes inside the high-pressure diesel nozzle holes have been numerically analyzed by using a two-fluid approach. In order to improve prediction of nozzle hole cavitation content under high-pressure injection conditions, a new adjustment model of bubble number density has also been developed through the analysis of cavitation bubble dynamics and internal flow characteristics of nozzle hole. Model validation results verify that this model is applicable for a wide range of diesel injection pressures. Based on simulation results, it has been found that cavitation bubbles in recirculation zone and its wake flow show totally different responses to the variations of upstream pressure, and the evolution of cavitation content shows a close association with the time derivatives of upstream pressure.
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影响因子：
2.4
作者：
K. Ramamurthi;S. Patnaik
通讯作者：
K. Ramamurthi;S. Patnaik
DOI：
10.4271/2004-01-0023
发表时间：
2004-03
期刊：
SAE transactions
影响因子：
--
作者：
M. Pontoppidan;F. Ausiello;G. Bella;S. Ubertini
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M. Pontoppidan;F. Ausiello;G. Bella;S. Ubertini
影响因子：
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作者：
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影响因子：
7.4
作者：
Payri, F;Bermúdez, V;Salvador, FJ
通讯作者：
Salvador, FJ
DOI：
10.4271/1999-01-3491
发表时间：
1999-10
期刊：
--
影响因子：
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作者：
H. Tsunemoto;R. Montajir;H. Ishitani;T. Hayashi;D. Harai
通讯作者：
H. Tsunemoto;R. Montajir;H. Ishitani;T. Hayashi;D. Harai