主要目的是考察粗颗粒床层对压力脉动的影响。
The main purpose of the studies was to show the effect of coarse particles on pressure fluctuation.
使用快关调节阀控制能激励周期蒸汽压力脉动。
Periodic pressure undulation may be incited by fast valving control.
提出了在纯水液压泵中气蚀初生伴随着低频压力脉动现象。
It is suggested that low frequency fluctuation occurs with cavitation inception in water hydraulic pump.
流体传输管道内的压力脉动反映了流体动态流动的基本特性。
The pressure surge in fluid transmission pipeline is one of the basic characteristics of fluid dynamic flow.
通过对比，提出主动滤波是降低压力脉动的一种行之有效的方法。
By comparison, it is proposed that the active filter is one effective method of the decrease pressure pulsation.
评述了压力脉动生物反应器的出现背景及其对生物发酵工业的影响。
The background of the pressure pulse bioreactor appearance and its effect on fermentation industry has been described.
并推荐一种专门用来消除压力脉动的盒式蓄能器及其容积的计算方法。
A special box tyPe accumulator for absorbing pulse and the formula for calculation of its volume are recommended.
液压系统动力学振动程度可用瞬时速度、压力和压力脉动描述其特性。
The dynamic vibration of hydraulic system is characteristic of instantaneous velocity, pressure and its oscillation.
因为压力脉动减小导致流速增加，从而使冲击噪声和涡流噪声略有增加。
Because velocity of flow reduces when the pressure pulse reduces, the noise of impulsion and the noise of vortex increase a little.
提出了一种既能减小管路振动又能衰减流体压力脉动的管路消振器结构。
In this paper, a new pipe attenuator that can reduce both the pipe vibration and the pulsating fluid pressure is designed and developed.
如果驱动压力脉动幅值足够大，到一定的相位差时，脉动燃烧停止工作。
The pulse flame will be blowout at certain phase difference, if the amplitude of the exciting pressure pulsation is great enough.
通过实验研究，得到了实验压力脉动曲线和实验气泡、气穴现象摄像数据。
The experimental pressure pulsation curve and video data of gas bubbles and cavitation phenomenon are obtained by the experiment.
准确可靠地测量压力脉动，对流体脉动的理论和试验研究都是非常重要的。
Its measurement is very important for both theoretical and experimental researches of flow and pressure surges.
充气增压或不用充气增压的气力式压力脉动阻尼器。通常安装在泵的输出端。
Air chamber pneumatic pressure pulsation damper air vessel air bottle pressure chamber.
氮气首先给气囊充气，以消除脉冲停止时的由往复式活塞泵产生的压力脉动。
The nitrogen gas precharged bladder inside the Pulse-Stop dampens the pressure pulsations created by the reciprocating action of the pumps.
本文对低压液压管路有气泡和气穴产生的瞬态压力脉动过程进行了实验研究。
The experiments of the pressure transients accompanying the growing and collapsing of gas bubbles and cavitation in low pressure hydraulic pipelines are carried out.
本文在分析齿轮泵的流量脉动和压力脉动的基础上，设计出一种错齿齿轮泵。
The interlaced gear pump is designed on the basis of analysing flow and pressure pulses.
本文应用谱分析理论研究了剪切湍流场中的压力脉动，包括功率谱、均方值等。
The pressure fluctuations in turbulent shear flows are investigated with the theory of spectral analysis.
详细分析了尾水管进口截面的压力脉动的幅值和相位，并对尾水管内的流动做了分析。
Amplitude and phase of pressure fluctuation at the inlet of draft tube as well as the inner flow in draft tube are analyzed in detail.
蜂窝密封、梳齿密封和光滑密封的对比实验表明，密封间隙气流压力脉动谱图为离散谱。
The contrast tests of smooth seals, labyrinth and honeycomb seals have demonstrated the seal gas clearance pulsation spectrum is a discrete one.
通过与模型试验结果进行比较可以看出，本计算能够比较准确地预测尾水管内的压力脉动。
The comparison between the calculation results and experimental data indicates that the calculation in this paper can medict the pressure fluctuation in draft tube very well.
研究了利用压力脉动固态发酵新技术进行白僵菌工业化生产的可行性及相关工艺控制参数。
The feasibility and technical parameter of the industrial production for beauveria which make use of the new technique of fermentation pulsatile with pressure have been studied.
泵输出的周期性脉动流体的压力脉动，是引起流体谐振、激励管路振动和噪声的主要原因。
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise.
理论及试验证实它对油源压力脉动衰减幅度大，衰减频带宽，是一种性能良好的脉动衰减器。
The theory and experiment verifies that it is a good pulsating attenuator and has large attenuation amplitude and wide attenuation band to pressure pulsation of oil source.
因液体压力脉动形成的作用于液压导管的交变载荷是造成液压导管疲劳破裂的主要因素之一。
The variational load engendered by hydraulic pressure undulation is one of the main factors of hydraulic pipe fatigue break.
水管路系统流体压力脉动及其引起的流噪声会降低管路系统自身工作的可靠性和舰船的隐蔽性。
The fluid pressure pulse and flow-noise in water piping system decreased the operation safety of piping system and hiding ability of submarines.
通过对液压系统中产生压力脉动的机理分析，介绍被动滤波和主动滤波两种降低压力脉动的方法。
By analysis mechanism of the pressure pulsation for hydraulic system, introduced two methods, the passive filtering and the active filtering, to decrease pressure pulsation.
本文分析了液压系统流量、压力脉动与噪声的关系，对系统的流体噪声产生与传播进行了一些探讨；
This paper has analyzed the relationship of flow, pressure pulsation and noise in hydraulic system, and has inquired into generation and propagation of fluid noise in the system.
螺旋式罗茨泵在稳定过流剪切敏感介质压力脉动质量，减少噪音、振动，避免气蚀等方面有较大改善。
Helical Roots pump has great improvements on the face of stabilizing pressure pulse quality of passing cut sensitivity medium, reducing noises and vibration, avoiding vapor fret etc.
提出消除振动的主要对策，包括避免固有频率接近引起的谐振、减少压力脉动及接蓄能器吸收振动等。
The vibration dispose countermeasures which includes preventing resonance caused by same inhere frequency, lessening pressure puke and using accumulator to absorb vibration etc.
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