pressure fluctuation

Empirical formula of turbulent boundary layer pressure fluctuation spectrum on underwater body of revolution

水下回转体湍流边界层压力起伏谱经验公式

Based on principles of internal combustion engine and fluid dynamics, combined with analysis of test behavior, the ensuing research test finds that the problem results from large pressure fluctuation in intake pipes.

相继展开的研究性试验，依据内燃机原理及流体力学等基础理论，结合对试验中的各种实际表象的分析，找到了原因是进气管压力波动较大所致。

Calculating results show that fluctuation pressure decrease with eccentricity between drill stem and well bore increase.

计算结果表明:随钻柱与井眼间偏心度增大,波动压力减小.全偏心情况下的波动压力大约只有同心情况下的一半.

Analysis of Pressure Fluctuation in the Draft Tube of ALSTOM Units in the Left Bank of Three Gorges Hydropower Station

三峡水电厂左岸ALSTOM机组尾水管压力脉动分析

Kolmogorov entropy and correlation dimension are maculated according to the pressure fluctuation.

通过所获得的系统在各个条件下的压力波动时间序列的理论分析，计算了系统在不同条件下的混沌行为的参数Kolmogorov熵和关联维数。

Air Pressure Fluctuation Induced by Sea Tide in a Coastal Unsaturated Zone Covered with a Layer of Lower Permeability

海潮引起的临海地区低渗透性覆盖层下包气带中的气压波动

Generally, the friction differential pressure fluctuation signal or throttle differential pressure fluctuation signal was used to analyze the property of Gas-liquid two-phase flow.

以往对差压波动信号的分析，通常是指平行于流向测得的管道的沿程压力损失或节流装置产生的压力差。

Research of Influence of Temperature Fluctuation on Accurate Pressure Measurement on FBG Sensing

温度波动对光栅压力型传感器精确测量影响的研究

Under the regulation of the control system, the temperature can reach a preset one only after a single adjustment with the maximal temperature fluctuation being within a range of ± 5 ℃ and the pressure value being totally dependent on the temperature in the reactor.

在控制系统的调节下，温度经过一次调整即可达到预设定值，最大温度波动范围在±5℃以内，压力值完全取决于反应器内部的温度。

Numerical Simulation of Pressure Fluctuation and Radial Force in a Double Volute Pump

双蜗壳泵压力脉动特性及叶轮径向力数值模拟

The interference of a side cylinder on the pressure fluctuation of two cylinders in tandem arrangement

侧柱对串列双柱脉动压力的干扰

Spectral analysis of pressure fluctuation signals of flow using AR method

基于自回归模型的水流脉动压力频谱特征研究

We simulated not only the pressure fluctuation in front of the runner, but also the unsteady vortex in the draft tube by means of the unsteady flow computation in an entire model turbine. Thus, the realistic hydraulic unsteady phenomena occurring in the turbine was predicted.

通过模型水轮机全流道瞬变流计算，不仅模拟到转轮前的压力脉动，而且模拟出尾水管中非定常涡带，从而预估出了水轮机中的水力非稳定现象。

Consequently, the pressure fluctuation on the base slab of the pool is reduced in both amplitude and frequency.

作用在消力池底板上的脉动压力不仅强度减小，而且频率也降低。

Experiment on Pressure Fluctuation of Gas-Solid Two-phase Flow in the Cyclone Dipleg

气固两相流顺重力流动的压力脉动实验研究

Several apparatuses for improving extrusion, such as gear pump, pressure fluctuation controller, die thickness regulator, etc., were introduced.

介绍了几种能够提高塑料挤出制品精度的技术与装置，其中包括齿轮泵、压力波动控制器、口模厚度自动调节装置等。

In this paper the rapid distortion theory is summarized briefly, and the application of this theory to the description of shear-free boundary layer, wall pressure fluctuation, flow over a low obstacle, interaction between different turbulent scales and some other problems is also briefly reviewed.

本文对湍流快速畸变理论进行了简要回顾，对其在无切变边界层、过山流动、脉动壁压、湍流大小尺度之间的相互作用等方面的应用进行了简要介绍。

The first task of applying deterministic chaos theory to studying the dynamics of fluidized bed from the time series of pressure fluctuation is the computation of delay time of reconstructed phase space. This paper studies the influence of periodic and stochastic signal on the computation.

应用混沌理论从流化床压力波动时间序列来研究流化床动力学行为的首要任务就是确定重构相空间滞时。

The piston pump with cylindrical cam-drive mechanism changes the discipline of the movement of the plunger through the cylindrical cam-drive mechanism with special profile, which leads to no fluctuation in constant flow and pressure. The uneven degree of theoretical flow is zero.

圆柱凸轮柱塞泵是通过具有特殊轮廓曲线的圆柱凸轮机构改变柱塞的运动规律，使其流量和压力基本无波动，流量不均度理论上为零。

A Shannon Information Entropy Analysis of Pressure Fluctuation Signals From an Underfed Circulating Spouted Bed

底饲进料循环喷动床内压力脉动信号的SHANNON信息熵分析

The pressure fluctuation of the tip clearance flow of the rotor in a single-stage axial compressor have been measured and analyzed in this paper.

本文对一单级轴流压气机的转子叶尖间隙流场的动态压力进行了测量与研究。

Carotid sinus and aortic arch baroreflex plays the key role in buffering the fluctuation of blood pressure and keeping blood pressure homeostasis.

颈动脉窦、主动脉弓压力感受器反射是缓冲血压变化，维持机体血压稳态的重要调节机制。

Time-domain analysis shows that the pressure fluctuation signals of different flow patterns have different amplitudes and periodicities.

时域分析表明，不同的流型压差波动信号的幅值和周期不同。

The character of fluctuation pressure in turbulance flow on discharge building is studied with test and time space correlation method.

利用试验及时空相关分析的方法，研究了泄水建筑物紊流区脉动压力的特性。

[ 7] has made some estimates of this term, in this paper, according to the equations for velocity fluctuation, the pressure fluctuation Is solved so that the average value of the product of the pressure fluctuation and the velocity fluctuation gradient is obtained.

本文根据脉动速度所满足的方程解出脉动压力，然后进而求出脉动压力乘上脉动速度变形的平均值，得到了脉动压力脉动速度变形平均项的完整表达式。

The Effect of Gatage on the Pressure Fluctuation in Draft Tube of Francis Turbine

导叶开口对混流水轮机尾水管压力脉动的影响

Hydraulic pressure elevating gear: This organization uses the hydraulic pressure elevating mechanism realization complete machine fluctuation.

液压升降装置: 该机构采用液压升降机构实现整机升降.

Pressure fluctuation frequency characteristics in spout-fluid bed based on ARM power spectrum analysis

基于ARM功率谱分析的喷动流化床压力波动频率特性

Based on the theory of time series analysis, differential pressure fluctuation signals of gas-liquid two-phase flow are analyzed.

用时间序列方法分析气液两相流差压波动信号。

Experimental study of low frequency component of intracranial pressure fluctuation during intracranial hypertension

颅高压状态下颅压波动低频成分的实验研究