文章详细信息 关键词： 天然气发动机;高压共轨;两级调压;数值模拟;压力波动 [gap=975]e;high-pressure common rail;two-staged pressure regulation;numerical simulation;pressure fluctuation
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... surge impedance [电工学]突波阻抗；特性阻抗；浪涌阻抗 pressure surge 压力波动，冲击压力 surge bin 贮仓，储料仓；缓冲仓；平衡料仓 ...
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... fluctuation of medium 介质起伏 fluctuation of pressure 压力波动 fluctuation range 波动范围 ...
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Through the simulation, the main cause of pressure fluctuate was found, that is, injection pulse width and pump pulse width, the matching between two pulse width and time interval of the two pulse.
计算结果表明:导致压力波动的最主要因素是喷油脉宽和供油脉宽的大小、脉宽匹配及其两者时间间隔。
参考来源 - 柴油机高压共轨系统压力动态特性模拟The paper adopts three-dimensional unsteady viscous compressible non-homentropic flow model, Three-dimensional numerical simulation on the air pressure change in the high-speed railway tunnel is carried.
采用三维粘性、不等熵、可压缩、非定常流动模型，对高速铁路隧道内的空气压力波动进行了数值模拟，找到了隧道断面上最大压力变化位置和隧道中明显呈现三维效应的断面位置。 高速铁路隧道气动疲劳荷载谱。
参考来源 - 高速铁路隧道内气动荷载研究·2,447,543篇论文数据，部分数据来源于NoteExpress
脉搏：心脏收缩造成的动脉中的压力波动。
Pulse: Pressure wave in the arteries from contraction of the heart.
轴向压力波动与螺杆的几何结构变化有关。
Fluctuating pressure came from the different structures of the screws.
迅速关闭阀门，水锤或供应压力波动可能导致间歇性排放。
Quick closing valves, water hammer or supply pressure fluctuations can cause intermittent discharge.
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