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单个气泡
相关语句
  single bubble
     In the foaming process, the creation and movement of single bubble in the aluminum melt have analyzed, the nozzle geometry and its diameter have a great effect on the size and movement of the bubble.
     通过对熔体直通气体发泡法制备泡沫铝时熔体中泡沫化过程的理论分析,以及单个气泡在铝液中的生成和运动情况的分析计算,得出了影响生成气泡大小和气泡运动的关键因素是喷嘴孔口的几何形状和孔口直径大小。
短句来源
     Heat and mass transfer modeling of a single bubble during submerged combustion evaporation
     浸没燃烧蒸发过程单个气泡传热传质模型
短句来源
     Result of single bubble study shows that the experimental result is in agreement with that of theory.
     对于单个气泡的研究表明,理论结果与实验波形的变化趋势相同,波动总的浮动点数相同,理论与实验结果基本相符。
短句来源
     A Model and Calculations for the Rise Velocity of a Single Bubble in Pressurized Liquid-solid Fluidized Beds
     单个气泡在加压液-固流化床中上升速度的模型与计算
短句来源
     On this basis, single bubble formation during the foaming process of molten aluminum is analyzed and the bubble size is estimated.
     在此基础上,分析泡沫铝制取过程中单个气泡的产生,并估算气泡尺寸。
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  “单个气泡”译为未确定词的双语例句
     One application of the model is to calculate the angular distribution of the scattering light by a single air bubble.
     该模型可应用于光在水中单个气泡上散射的数值计算。
短句来源
     By using the methods and models,motions,deformation and heat transfer characteristic of a rising bubble in a gas liquid two-phase flows system were calculated.
     利用所编制的程序计算了竖直流道中的单个气泡的形状、运动特性以及气泡内外流场与传热特性,并对竖直通道宽度在不同情况下,对气泡的形状、运动特性以及传热特性进行了进一步的研究。
短句来源
     Based on the Mie scattering theory and the theory of light multiple scattering,the light scattering properties of air bubbles in the water are calculated by Monte-Carlo simulation.
     基于M ie散射理论的单个气泡光散射,考虑光的多次散射,用蒙特卡罗方法模拟计算水中气泡群的光散射特性。
短句来源
     Based on the Mie scattering theory, the bubble scattering intensities at different scattering direction were calculated and the scattering properties on one cross section of the ship wakes was obtained with the assumption that the bubbles were not relevant to each other.
     根据 Mie散射理论 ,在认为气泡不相干的情况下 ,计算了单个气泡在不同散射方向的散射强度 ,得出舰船尾流某个横截面上气泡群的光散射特性。
短句来源
     Making use of the volumetric heat transfer coefficient derived under taking into account the fragmentation of the two-phase droplet,the parameters in the model are determined by the theoretical analysis and the experimental research.
     在考虑气泡被连续相流体破碎的情况下 ,借助于平均体积传热系数模型 ,在理论分析基础上通过实验研究建立了单个气泡的传热系数模型 ,模型参数有较好的关联性
短句来源
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  相似匹配句对
     Numerical simulation of rise and deformation of a three-dimensional gas bubble
     单个三维气泡运动的直接数值模拟
短句来源
     DIRECT NUMERICAL SIMULATIONS OF A SINGLE BUBBLE RISING IN STILL WATER
     静止水中单个上升气泡的直接数值模拟
短句来源
     Bubble Chamber
     气泡
短句来源
     Negative bubbles
     负气泡
短句来源
     Spectra of Single Cyanobacterial Cells
     单个蓝藻细胞的光谱
短句来源
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  single bubble
The same assumptions are made as in Rayleigh's formulation for the problem of the dynamics of a single bubble: that the process is spherically symmetric and that the pressure P2 (t) in the vapor phase is homogeneous.
      
The problem of unsteady heat and mass transfer for a single bubble containing an evaporating liquefied-gas drop is considered within the spherically symmetric formulation.
      
Mass Transfer from a Single Bubble in the Presence of Surfactants
      
Oxygen transfer from a single bubble is studied experimentally.
      
The effect of turbulence and surfactant concentration on mass transfer from a single bubble is analyzed.
      
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As well known, the measurements of the sound attenuation on a single bubble can be explained by thermal conductivity, viscousity and radiation losses. But when the measurements were made in a bubble screen, it will not be so simple. Since the theoretical loss is much less than the measured one, this problem is open until now.

单个气泡的声衰减的实验结果可以用热传导粘滞和辐射损失来解释,但对于气泡层中(这里有许多气泡)的实验来说,上述机理却不能解释。因为根据这些机理算得的理论值比实验值小很多,这一问题三十多年来尚未解决。 本文考虑气泡之间的声相互作用,算得的相互作用场和原始入射场有90°的相位差,这等效于在每个气泡上附加了一项阻力,从而使其阻尼增大很多。 应用本文理论与上述实验结果比较,两者符合得很好。本文理论也指出,声相互作用并不改变气泡的共振频率,只是使其共振曲线展宽。当声波频率低于共振频率时,气泡的伴振质量增大,劲度减小。当频率高于共振频率时,情况则相反。

A new technique by using a dual probe has been developed for the measure- ment of bubble behaviour and pressure fluctuations in a fluidized bed.A number of valuable information with relatively good precision were obtained.These are: the pierce length of bubble,mode of wave propagation,concentration of particles in the cloud and in the wake of the bubble,the pressure gradient within the bu- bble,the bubble rise velocity, the relationship between pressure fluetuation,and bubble behaviour and the auto-and cross-correlation...

A new technique by using a dual probe has been developed for the measure- ment of bubble behaviour and pressure fluctuations in a fluidized bed.A number of valuable information with relatively good precision were obtained.These are: the pierce length of bubble,mode of wave propagation,concentration of particles in the cloud and in the wake of the bubble,the pressure gradient within the bu- bble,the bubble rise velocity, the relationship between pressure fluetuation,and bubble behaviour and the auto-and cross-correlation between signals.Based on the mode of wave propagation,the components of the pressure fluctuation can be analyzed.The results obtained from the present investigation gave some different conclusions as compared with those published in the literature.

设制了将压力探头与电导探头置于同一轴以测量同一点的电导率信号和压力脉动信号的压力电导复合探头,并在二维床(1000×380×19 mm)内,用活性炭作流化粒子、空气为流化介质,钢瓶 N_2产生气泡源进行实测,通过对单个气泡,气泡串和操作态等复合探头信号进行分析,初步得到了压力脉动信号的性质和传播规律,对气泡特性有了新的认识,并对气泡信号与压力脉动信号间的联系作了分析,为进一步定量研究打下了基础。

This paper consists of two parts dealing with gas-liquid dispersion and mass transfer characteristics in stirred vessel. In part(I), an apparatus equipped with optical and microprocessor for measuring the interfacial area by light scattering method is described and the results of measurement of interfacial area, gas-hold up and mass transfer coefficients are presented. Based on the rising motion of a single bubble in static liquid of infinite dimension and on the isotropic turbulance theory, the rising velosity...

This paper consists of two parts dealing with gas-liquid dispersion and mass transfer characteristics in stirred vessel. In part(I), an apparatus equipped with optical and microprocessor for measuring the interfacial area by light scattering method is described and the results of measurement of interfacial area, gas-hold up and mass transfer coefficients are presented. Based on the rising motion of a single bubble in static liquid of infinite dimension and on the isotropic turbulance theory, the rising velosity of a single bubble in turbulent liquid has been derived, with some reasonable assumptions, We have obtained the relationships between gas-hold up, interfacial area and other operating varibles, and they can correlate well the experimental data. In part(Ⅱ), the relationships of surface-renewing frequency, turbulent parameters and operational varibles have been derived, combining the equa-tions derived in part(I) and part(Ⅱ), the mass transfer coefficients ha-ve been calculated. The agreement with the experimental data is satisfac-tory.

本文分两部分。分别探讨鼓泡搅拌槽内的气液分散和传质特性。在本文(Ⅰ)中。应用光纤和微机技术建立了光衰减法测定相界面积的实验装置,测定了鼓泡搅拌槽内的相界面积、气含率和传质系数。以静止、无限液体中单个气泡上升运动为基础,结合各相同性湍流理论,推导了湍流液体中单个气泡上升速度公式,通过恰当假设,应用于气泡群,得到了槽内气含率、相界面积和操作变数之间的关系,和实验结果比较,两者基本一致。在本文(Ⅱ)中,根据表面更新和湍流扩散的概念,推导了更新颇率、湍流扩散参数和操作变数之间的关系,和气含率、相界面积的公式相结合,计算了传质系数kL,和测定的实验结果比较,符合良好。

 
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