The setpoint control of the Ievel is one of the principal factors that cause the flow oscillation.
液位的定值控制是造成物流频繁变化的主要因素之一。
In the experiment it is found that at a certain external flow velocity and cavity size a strongly self sustained flow oscillation in the cavity would appear.
实验发现，在一定的气流速度和空腔几何尺寸下，空腔内流动会出现强烈的自持振荡。
In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance.
为探索冲击射流离散频率噪声的产生机理，系统地研究了冲击射流离散频率噪声的特性。
Free oscillation of ball in guide ribs facilitates full port flow with minimum turbulence and chatter.
在导翼中自由振荡的球有利于全流道流动，最大限度减小湍流和振荡。
On the basis of summing various test results, it is put forward that surging phenomena and intermittent oscillation phenomena are caused by buckling of blade channel flow field.
在总结历次试验结果的基础上，得出了喘振现象及间歇式振动现象是由多叶风机叶道流场失去稳定性所引起的结论。
The flow field of combustor inlet, and the fuel distribution, etc. have a great effect on the combustion oscillation.
燃烧室的进口流场，燃油浓度分布等对振动有很大的影响；
The flow induced oscillation in a cavity exposed to external high speed flow and its suppression by means of sound excitation at the leading edge of the cavity are experimentally studied.
实验研究了矩形空腔在外部高速气流作用下诱导的空腔内流动振荡问题，以及从空腔前缘加入纯音声激励以抑制空腔内流动振荡的技术。
The behavior of oscillation chamber flow field is an important content of studying drilling hydraulic independent excitation oscillation.
振荡腔室内流场特性是研究钻井水力它激振荡的重要内容。
The digital driving methods are studied, the performance of flow tubes in the outset of oscillation is improved by the digital control technique. And a digital driving scheme is presented.
研究数字驱动方法并利用数字控制方法提高流量管的起振性能，给出了数字驱动方案。
The aerodynamic undamping phenomena and the relevant mechanism are investigated for the aerospace launch vehicle undergoing fluid-structure coupling oscillation in transonic flow.
研究跨音速飞行航天器的流-固耦合振动非阻尼现象的作用机理。
To explain the generative mechanism of low pressure and mass flow self-excited oscillation pulsed jet, the nozzle optimized design range of structure and operation parameters was investigated.
为了揭示低压大流量下自激振荡脉冲射流清洗的脉冲发生机理，研究了这种工况下喷嘴结构和运行参数的优化设计范围。
The presence of a smooth interface is responsible for the observation of intensity oscillation in GIXR, which is well correlated to step flow observation in AFM images of the surface.
掠入射x射线反射谱的显著强度振荡与原子力显微镜所观察到的台阶流动形貌表明了平整的界面和表面的存在。
In this paper, the shear layer oscillation mechanism is analyzed producing and impacting which aiming at the flow circs of the jet flow simulation.
本文针对伺服阀前置级射流流场的流动情况，分析了产生和影响剪切层振荡的机理。
All the phenomena show: water flow resistance is the important prerequisite to cause transpiration fluctuation, and the latter can be the result of stomatal oscillation.
这些现象说明，水流阻力是蒸腾波动产生的重要前提条件，而蒸腾波动则可能是气孔开合波动的直接结果。
In hydraulic transmission system, the pump's flow pulse frequency and the pipes base frequency affects each other, if the valves shut suddenly, resonance oscillation may take place.
液压系统中阀门(换向阀等)突然关闭时，液压泵的流量脉动频率和管道的基本频率相互作用，可能发生谐振。
The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range.
本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。
They can easy show the behaviors of the flow in the whole cube, reveal the phenomenon of locity overshooting and damping oscillation of the flow.
通过管中心和其它管线的速度变化趋势，以及圆管径向的速度分布，描述了流场的整体流动特性，揭示了非牛顿流体管道流的速度过冲和振荡现象。
The effects of oscillation equilibrium time (or flow—rate), pH of aqueous phase and the foreign ions on the extraction were examined.
考察了振荡平衡时间（或流速），水相的酸度和干扰元素的影响。
The effects of oscillation equilibrium time (or flow-rate) and the ph of aqueous phase on the extraction were examined.
考察了振荡平衡时间(或流速)、水相的酸度等的影响。
The effect of blending was investigated by analyzing the viscoelasticity, pressure oscillation, flow curves and extrudate appearance.
采用双毛细管流变仪详细研究了聚乙烯及其共聚物的挤出畸变、管壁滑移及挤出压力振荡现象。
This scheme is also used to simulate a two-dimensional viscous flow. Calculation results confirm its high accuracy and high resolutions, good ability in capture shock and no oscillation.
计算结果表明这种格式不仅具有较高的精度和分辨率，而且还保证了在间断附近基本无虚假波动。
It is shown that the flow instability with high frequency belongs to acoustic oscillation and the flow instability with low frequency is density wave instability.
高频脉动属于声波型脉动，低频脉动属于密度波型脉动。
It is shown that the flow instability with high frequency belongs to acoustic oscillation and the flow instability with low frequency is density wave instability.
高频脉动属于声波型脉动，低频脉动属于密度波型脉动。
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