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空隙率波
相关语句
  void fraction wave
     Measurement of Void Fraction Wave in Vertical Gas\|liquid Flow
     垂直气液两相管流中的空隙率波测量
短句来源
     The measurement and analysis results of void fraction waves in different flow regimes show that the propagating velocity of void fraction wave depends on flow regimes and mean void fraction.
     对竖直气液两相管流中的空隙率波进行了测量和分析。 结果表明 ,不同流型的空隙率波其传播速度不同 ,并随含气率的升高而增大 ,泡状流“失稳”前后空隙率波的相速度与群速度不相等 ,属于色散波。
短句来源
     Before the bubbly flow transits to cap bubbly flow, the growth rate of void fraction wave becomes the maximum value when the disturbance frequency is close to the main frequency of void fraction wave.
     空隙率波的增长系数求解结果表明 ,泡状流向弹帽泡状流转化时 ,空隙率波对有限扰动是不稳定的 ,并对扰动的频率有所选择。 当扰动频率与空隙率波的主控频率相近时 ,空隙率波呈最大增长状态。
短句来源
  voidage wave
     VOIDAGE WAVE CELERITY AND GAS DRIFT VELOCITY IN VERTICAL BUBBLY FLOW
     空隙率波的波速与气相漂移特性研究
短句来源
  void fraction waves
     The disturbance at some frequencies can enhance the velocities of phase and void fraction waves.
     利用扰动方法研究了空隙率波的不稳定性 ,发现某些频率的扰动能使空隙率波的波速和相速度有所提高。
短句来源
     Study of flow pattern discrimination in vertical gas-liquid two-phase flow based on the characteristics of void fraction waves
     基于空隙率波特性的垂直气液两相流流型判别研究
短句来源
     The measurement and analysis results of void fraction waves in different flow regimes show that the propagating velocity of void fraction wave depends on flow regimes and mean void fraction.
     对竖直气液两相管流中的空隙率波进行了测量和分析。 结果表明 ,不同流型的空隙率波其传播速度不同 ,并随含气率的升高而增大 ,泡状流“失稳”前后空隙率波的相速度与群速度不相等 ,属于色散波。
短句来源
     The results indicate that the characteristics of void fraction waves, PDF and spectral distribution of different flow patterns are different. With the increase of void fraction, the frequencies of void fraction waves come to single.
     结果表明,不同流型的空隙率波、概率密度函数(PDF)曲线和频谱曲线具有不同的特征,截面平均含气率越高,空隙率波的频率越趋于单一。
短句来源
     Void fraction waves of various flow patterns in vertical gas-liquid two-phase flow were obtained from experiments. The probability distribution function (PDF) and spectral distribution of various basic flow patterns such as bubble flow, cap bubble flow, slug flow and churn flow were gained by means of signal processing.
     通过实验得到了垂直管内气液两相流动各种流型的空隙率波,对空隙率波进行信号处理,得到了泡状流、弹帽泡状流、段塞流、沫状流等各种基本流型的空隙率概率密度分布规律和频谱。
短句来源
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  “空隙率波”译为未确定词的双语例句
     With the Grassberg method, the correlative dimensionality D_(2) and the correlation entropy K_(2) of void fraction wavesignals are calculated as D_(2)=2.39 and K_(2)=0.207 before bubbly flow evolving to other flow regimes.
     利用Grassberg的计算方法,计算了泡状流失稳前后空隙率波时域信号的关联维数D2和关联熵K2,泡状流失稳时关联维数D2=2.39,关联熵为0.207。
短句来源
     Gas\|liquid two phase flow experiments were conducted in a vertical pipe whose d iameter is 112.5 ? mm, and length is 12?
     在直径为1125 m m ,长度12 m 的垂直管中,利用阻抗式空隙率计对垂直气液两相管流空隙率波进行了测量。
短句来源
     The propagating velocity value of void fra ction wave is higher in big diameter pipe than that of small diameter pipe.
     管径大,空隙率波的传播速度高。
短句来源
     Therefore, on condition of invisualization, different flow patterns can be distinguished by means of curve characteristics above, especially the PDF distribution curves.
     因此在不可视的条件下可以根据空隙率波特性,利用这些曲线特别是PDF曲线特性判别流型。
短句来源
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  void fraction waves
There is experimental evidence for the existence of stable void fraction waves.
      


Gas\|liquid two phase flow experiments were conducted in a vertical pipe whose d iameter is 112.5 ?mm, and length is 12?m. Void fraction waves were measured by impedance void fraction meters and analyzed. The results show that the liquid su perficial velocity and the pipe diameter are two main factors to affect the evol ution of the flow regime and the characteristics of void fraction wave. The crit ical void fraction of bubbly flow losing its stability becomes lower with the li quid superficial velocity...

Gas\|liquid two phase flow experiments were conducted in a vertical pipe whose d iameter is 112.5 ?mm, and length is 12?m. Void fraction waves were measured by impedance void fraction meters and analyzed. The results show that the liquid su perficial velocity and the pipe diameter are two main factors to affect the evol ution of the flow regime and the characteristics of void fraction wave. The crit ical void fraction of bubbly flow losing its stability becomes lower with the li quid superficial velocity goes high. The propagating velocity value of void fra ction wave is higher in big diameter pipe than that of small diameter pipe. Anal yzing results show that the turbulivity plays an important role in the process o f flow regime evolution. The analysis on void fraction waves shows that the curv es of PDF and amplitude spectrum in different regimes are different, and the fre quencies of void fraction waves become single with increasing of void fraction.

在直径为1125 m m ,长度12 m 的垂直管中,利用阻抗式空隙率计对垂直气液两相管流空隙率波进行了测量。结果表明连续相表观流速和管径对流态的演化和空隙率波的传播特性有较大的影响。连续相表观流速大,泡状流失稳的临界含气率低;管径大,空隙率波的传播速度高。分析结果表明流动湍流度对流态的演化起非常重要的作用。对空隙率波的分析表明不同流态的空隙率波的 P D F 和频谱曲线具有不同的特征;含气量越高,空隙率波的频率越趋于单一。

It is studied that the formation mechanism of Taylor bubble and its control method in gas\|liquid two\|phase flow,which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering.Experiments show that the formation of Taylor bubble in gas\|liquid two\|phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation.Thus,the flow regime transition may be...

It is studied that the formation mechanism of Taylor bubble and its control method in gas\|liquid two\|phase flow,which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering.Experiments show that the formation of Taylor bubble in gas\|liquid two\|phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation.Thus,the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency.

对大管径气 液两相流动中严重影响压力平衡与机械驱动效率的段塞流生成机制和控制方法进行了研究 ,实验证明段塞流的形成是由于空隙率波的大幅度增长使气泡高度集中 ,并形成聚并所致。强湍流运动可以抑制Taylor泡的形成。因此 ,通过强化湍流或控制扰动频率可以对气泡聚并起明显的抑制作用

The measurement and analysis results of void fraction waves in different flow regimes show that the propagating velocity of void fraction wave depends on flow regimes and mean void fraction. The disturbance at some frequencies can enhance the velocities of phase and void fraction waves. The non linear analysis indicates that the instability of bubbly flow is a chaotic process. Before the bubbly flow transits to cap bubbly flow, the growth rate of void fraction wave becomes the maximum value when the disturbance...

The measurement and analysis results of void fraction waves in different flow regimes show that the propagating velocity of void fraction wave depends on flow regimes and mean void fraction. The disturbance at some frequencies can enhance the velocities of phase and void fraction waves. The non linear analysis indicates that the instability of bubbly flow is a chaotic process. Before the bubbly flow transits to cap bubbly flow, the growth rate of void fraction wave becomes the maximum value when the disturbance frequency is close to the main frequency of void fraction wave.

对竖直气液两相管流中的空隙率波进行了测量和分析。结果表明 ,不同流型的空隙率波其传播速度不同 ,并随含气率的升高而增大 ,泡状流“失稳”前后空隙率波的相速度与群速度不相等 ,属于色散波。利用扰动方法研究了空隙率波的不稳定性 ,发现某些频率的扰动能使空隙率波的波速和相速度有所提高。非线性分析结果表明 ,泡状流“失稳”时是一个混沌动力系统。空隙率波的增长系数求解结果表明 ,泡状流向弹帽泡状流转化时 ,空隙率波对有限扰动是不稳定的 ,并对扰动的频率有所选择。当扰动频率与空隙率波的主控频率相近时 ,空隙率波呈最大增长状态。

 
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