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pressure drop fluctuation
相关语句
  压降脉动
     The Mean-Square Deviation (MSD) of pressure drop fluctuation signal in stratified flow is small,and it is hardly influenced by the flow rate of liquid and gas and liquid hold-up.
     分层流压降脉动信号的方差很小,随气、液量和持液率的变化小;
短句来源
     The MSD of pressure drop fluctuation signal in slug flow is the biggest and is greatly influenced by the flow rate of liquid and gas and liquid hold-up, the MSD will be increased as hold-up and the flow rate of gas increase.
     段塞流压降脉动信号的方差最大,随气相流量和持液率的变化而变化较大,在相同气量下,方差随持液率的增大而增大,在相同持液率下,方差也随气量的增大而增大;
短句来源
     The MSD of pressure drop fluctuation signal in annular flow is between the two patterns mentioned above,and it is little changed with the flow rate of gas,but is greatly influenced by the flow rate of liquid. The MSD will be increased as hold-up and the flow rate of liquid increase.
     环状流的方差在分层流和段塞流之间,气相流量的变化对压降脉动信号的方差的影响小,但液相流量的变化对其影响较大,随着液相流量和持液率的增大,压降脉动信号的方差会增大。
短句来源
  “pressure drop fluctuation”译为未确定词的双语例句
     The uniformity of fluidization was assessed by the frequency of the fluctuation of capacitance(f_c), the mean amplitudes of pressure drop fluctuations (ΔP_f), and the maximum pressure drop fluctuation (ΔP_m). The factors and rules affecting fluidization uniformity for the particles of types of A, B and C Were obtained.
     用电容平均变化频率f_c和平均压力降脉动ΔP_f及最大压降脉功ΔP_M为参数,评价流化床的流化均一性,得出了影响A、B、C类粒子流化均一性的因素和规律性。
短句来源
     INFLUENCE OF VOID FRACTION ON DYNAMIC CHARACTERISTICS OF PRESSURE DROP FLUCTUATION IN HORIZONTAL GAS-LIQUID TWO-PHASE FLOW
     水平管道气液两相流中空隙率对动态压降信号的影响
短句来源
     On the common mode error of pressure drop fluctuation measuring systems
     动态差压检测系统的共模误差研究
短句来源
     At low flow rate, flow patterns were directly recognized by optical observation, at high flow rate, by a combination of camera and pressure/pressure drop fluctuation.
     低流量工况流型可直接通过目测观察来识别,高流量时借助于摄影和压力/压差波动图像来识别流型。
短句来源
     Experimental results of pressure drop, pressure drop fluctuation bed expansion and RTD of gas show that the behavior of fluidization varies with changing gas velocity.
     根据流化床压降、压降的脉动、床层膨胀和气体停留时间分布,了解到床层的流化性质随流化气速的变化有比较明显的差异,可以划分为鼓泡流化区和湍流流化区.
短句来源
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  相似匹配句对
     drop.
     drop,第1天。
短句来源
     Investigation on Pressure Drop Oscillation
     加热U型管内压力降型脉动发生界限研究
短句来源
     Study on the Pressure Drop in Hydrocyclone
     水力旋流器压力降的研究
短句来源
     pressure;
     压力;
短句来源
     Generalized Ensemble and Fluctuation
     广义系综与涨落
短句来源
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  pressure drop fluctuation
Investigations of local pressure drop fluctuation signals in annular type fluidized bed photoreactor by continuous wavelet trans
      
The flow behavior determined from the pressure drop fluctuation in the lower and upper section of the bed was analyzed with statistical methods.
      
The characteristics of pressure drop fluctuation in a 5.0 cm I.D.×250cm high circulating fluidized bed with fine polymer particles of PE and PVC were investigated.
      
An analysis of pressure drop fluctuation in a circulating fluidized bed
      
The amplitude of pressure drop fluctuation in the connection channel is well correlated with that of the kinetic energy for natural circulation rate.
      
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In this paper, the influences of the size and size distribution of particles on fluidization quality were investigated in a φ100mm bed for more than twenty systems consisted of sand, activated carbon, alumina and FCC particles by using nitrogen as the fluidization gas. Both the variation of the capacitance at local point and the fluctuation of pressure drop across the bed were continuously measured by a capacitance probe and a strain gauge. The uniformity of fluidization was assessed by the...

In this paper, the influences of the size and size distribution of particles on fluidization quality were investigated in a φ100mm bed for more than twenty systems consisted of sand, activated carbon, alumina and FCC particles by using nitrogen as the fluidization gas. Both the variation of the capacitance at local point and the fluctuation of pressure drop across the bed were continuously measured by a capacitance probe and a strain gauge. The uniformity of fluidization was assessed by the frequency of the fluctuation of capacitance(f_c), the mean amplitudes of pressure drop fluctuations (ΔP_f), and the maximum pressure drop fluctuation (ΔP_m). The factors and rules affecting fluidization uniformity for the particles of types of A, B and C Were obtained.

本研究在φ100×4的有机玻璃流化床冷模装置中,以N_2为流化气体,对黄沙、活性炭、氧化铝和FCC四种物料的二十多个系统,研究了粒度及粒度分布对流化均一性的影响。实验利用电容探针和电阻应变片作检测元件,连续测定流化床中定点的电容变化和床层压降的脉动。用电容平均变化频率f_c和平均压力降脉动ΔP_f及最大压降脉功ΔP_M为参数,评价流化床的流化均一性,得出了影响A、B、C类粒子流化均一性的因素和规律性。

The characteristics of a 60 mm I. D. fluidized bed with baffles are studied using particles belonging to group B in Geldart's classifcation. Experimental results of pressure drop, pressure drop fluctuation bed expansion and RTD of gas show that the behavior of fluidization varies with changing gas velocity. Apparently it can be devided into two regions, i. e. bubbling and turbulent regions. It is suggested that a critical point exists between the bubbling and the turbulent regions, this point may be referred...

The characteristics of a 60 mm I. D. fluidized bed with baffles are studied using particles belonging to group B in Geldart's classifcation. Experimental results of pressure drop, pressure drop fluctuation bed expansion and RTD of gas show that the behavior of fluidization varies with changing gas velocity. Apparently it can be devided into two regions, i. e. bubbling and turbulent regions. It is suggested that a critical point exists between the bubbling and the turbulent regions, this point may be referred to as the critical turbulent fluidized point. The critical turbulent fluidization velocity un corresponding to this point can be expressed by the following equation:

本文通过实验,在φ60mm的挡板流化床中考察了Geldart分类中B组颗粒的流化特性.根据流化床压降、压降的脉动、床层膨胀和气体停留时间分布,了解到床层的流化性质随流化气速的变化有比较明显的差异,可以划分为鼓泡流化区和湍流流化区.而由鼓泡流化区向湍流流化区过渡时存在着一个临界状态点,该点对应的气速称为临界湍流流化速度u_n,根据实验结果可关联出以下表达式:Re_n=0.1358ρ~(0.6576)Ga_ρ~(0.5120)其中:Re_n=u_nρ_fd_ρ|μ;Ga_ρ=d_ρ~3ρ_f~2g|μ~2ρ=ρ_s|ρ_f该式可作为粗颗粒挡板流化床中稳定湍流流化区的判据,其误差在10%以内.

The boundary of trickling-to-pulsing flow transition in trickle-bed reac- tors may be determined either by statistical feafures of the probability density function and standard deviation of pressure drop fluctuation or by sudden change in liquid-solid mass transfer coefficients, which are different from commonly used methods. Experimental results indicate that both methods are precise and reliable approaches for identification of flow pat- tern transition.

不同于通常采用的划分滴流床中流区分界点的方法,本文通过分析压降信号的概率密度函数、压降波动标准偏差以及根据液固传质系数的突变,确定滴流床中滴流区向脉动区的转变点。实验结果证明,这两种方法都能够准确、可靠地用来判断滴流床中流动形态的变化。

 
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