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脉动干扰
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  pulsating interference
     A Method for Removal of Fluid Pulsating Interference on Swirlmeter Based on Spectrum Phase Discrimination Using FFT
     基于FFT相位判别的旋进旋涡流量计抗流体脉动干扰方法
短句来源
     A spectrum phase discrimination method based on FFT to remove the effect of fluid pulsating interference on swirlmeter was proposed.
     提出了利用 FFT相位判别来消除流场脉动干扰对旋进旋涡流量计测量影响的方法。
短句来源
  “脉动干扰”译为未确定词的双语例句
     Major findings in experiment are as follows: firstly, the correlation between the velocity pressures of fluid disturbs wave and velocity pressure of vortex precession in swirlmeter is linear.
     实验研究表明,流体脉动干扰与旋进旋涡效应的脉动压力为线性叠加关系;
短句来源
  相似匹配句对
     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
短句来源
     The RNA interference
     核糖核酸干扰
短句来源
     RNA interference
     RNA干扰
短句来源
     The interference of pulsating flow is usually meeting in natural gas flow measurement.
     在天然气流量测量中常常遇到脉动流的干扰
短句来源
     Chaotic Pulsation in Variable Stars
     变星的混沌脉动
短句来源
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  pulsating interference
Pulsating interference ("beats") occurred when the stretch frequency was adjusted to values similar to the spontaneous frequency of the tissue.
      


Dynamic characteristics of swirlmeter in oscillatory flow is investigated. A 50 mm prototype swirlmeter is designed,and experimental study of characteristics of swirlmeter in oscillatory flow and steady flow is performed. The velocity pressure signals of vortex precession in swirlmeter are obtained by using two axisymmetrical setting piezoelectric press sensors. The influent factors of fluid oscillatory on swirlmeter are ascertained. Major findings in experiment are as follows: firstly, the correlation between...

Dynamic characteristics of swirlmeter in oscillatory flow is investigated. A 50 mm prototype swirlmeter is designed,and experimental study of characteristics of swirlmeter in oscillatory flow and steady flow is performed. The velocity pressure signals of vortex precession in swirlmeter are obtained by using two axisymmetrical setting piezoelectric press sensors. The influent factors of fluid oscillatory on swirlmeter are ascertained. Major findings in experiment are as follows: firstly, the correlation between the velocity pressures of fluid disturbs wave and velocity pressure of vortex precession in swirlmeter is linear. And secondly, the energy dissipation phenomena of fluid disturb lead to attenuate the vortex precession and extend the lower limit of swirlmeter. By using differential symmetry velocity pressure signals and improving electromagnetism shield of the measuring system, the effect of fluid oscillation on swirlmeter will be reduced.

研究了脉动流场中旋进旋涡流量计流体振动特性。在自行设计的实验装置中使用压电式压力传感器对50mm口径的旋进旋涡流量计在脉动干扰流场中的流体振动特性进行试验研究,明确了流体脉动对旋进旋涡效应的影响因素。实验研究表明,流体脉动干扰与旋进旋涡效应的脉动压力为线性叠加关系;流体脉动干扰的能量耗散作用将导致旋进旋涡效应的衰减,从而扩展旋进旋涡流量计测量的下限。并提出了新的设计,以利用对称脉动压力信号差分处理和改善测量系统的电磁屏蔽性能来减弱流场波动对该类流量计的影响。

A spectrum phase discrimination method based on FFT to remove the effect of fluid pulsating interference on swirlmeter was proposed. The effect of fluid pulsating interference on dynamic characteristics of swirlmeter was investigated.A ψ 50mm prototype swirlmeter was developed for the experiment instrument designed.Major findings in experiment are described as follows: First, the correlation between the velocity pressures of fluid disturb wave and velocity pressure of vortex procession in swirlmeter is linear...

A spectrum phase discrimination method based on FFT to remove the effect of fluid pulsating interference on swirlmeter was proposed. The effect of fluid pulsating interference on dynamic characteristics of swirlmeter was investigated.A ψ 50mm prototype swirlmeter was developed for the experiment instrument designed.Major findings in experiment are described as follows: First, the correlation between the velocity pressures of fluid disturb wave and velocity pressure of vortex procession in swirlmeter is linear correlation. Second,fluid disturbs lead to main frequency shift phenomena in the swirlmeter measure. A numerical example demonstrated the high efficiency of the method.

提出了利用 FFT相位判别来消除流场脉动干扰对旋进旋涡流量计测量影响的方法。研究了流体脉动对旋进旋涡流量计旋进旋涡效应特性的影响。在流量计实验装置上对 5 0 m m口径旋进旋涡流量计进行了实验研究。实验表明 :流体脉动干扰压力与旋进旋涡效应的脉动压力间存在线性迭加关系以及流场脉动干扰使旋进旋涡流量计传感器输出产生主频移动现象。数值实验表明了本方法的有效性。

The paper describes the characteristic of surface pressure distribution and the interference effect of nearby hill on a stadium covering.The wind pressures were measured at the stadium covering in a turbulent boundary layer wind tunnel,which simulated the natural wind over typical suburb terrain.The lift coefficients are utilized to study the distribution of the wind pressures on upper and lower surfaces and also net wind pressures.In order to study the interference effect of the nearby hill,a foam-made model...

The paper describes the characteristic of surface pressure distribution and the interference effect of nearby hill on a stadium covering.The wind pressures were measured at the stadium covering in a turbulent boundary layer wind tunnel,which simulated the natural wind over typical suburb terrain.The lift coefficients are utilized to study the distribution of the wind pressures on upper and lower surfaces and also net wind pressures.In order to study the interference effect of the nearby hill,a foam-made model with the same length scale of the stadium was placed in the wind tunnel.The difference of the lift coefficients under condition of with and without the interference is given.Three position relationships,which are upstream,parallel and downstream,are categorized to analyze the interference effect.And the interference effect of RMS fluctuating pressure is also given.The difference of the interference effect on closer and farther covering is distinguished.

针对一个典型的体育场看台挑篷,进行了刚性模型风洞试验,确定其平均风压和脉动风压,通过对挑篷升力系数的讨论,分析其上下表面风压和风压合力的分布规律。并考虑临近山体对挑篷的气动干扰,分析有、无干扰体情况下升力系数的不同分布规律,采用干扰因子对比分析山体对左右两个挑篷风压的影响,同时采用脉动干扰系数来分析干扰对挑篷脉动风压的影响,得出一些具有重要参考价值的结论。

 
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