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bubble
相关语句
  气泡
    The Hydrodynamic Calculation of a Single Bubble Movement and its Cavitation Behavior in a Free Flow Field and in Boundary Layer
    单气泡在自由流场和边界层流场中运动的水动力计算及其空化行为
短句来源
    Calculation of Motion of a Single Bubble in Pressure Fluctuation Field
    单气泡在压力脉动场中运动的数值计算
短句来源
    EXTENSION AND EXAMINATION OF KOBUS THEORY FOR THREE-DIMENSIONAL BUBBLE PLUME
    三维气泡羽流的Kobus理论的扩展与评判
短句来源
    NONLINEAR MODEL COUPLING OF BUBBLE OSCILLATIONS
    气泡振动的非线性耦合模型
短句来源
    NUMERICAL CALCULATION ON FLOW FIELD OF THE BUBBLE PULSE BY EXPLOSION UNDER WATER
    水中爆炸气泡脉动流场的数值计算
短句来源
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    White Light Bubble Image Velocimetry
    白光氧气图像测速技术(英文)
短句来源
    THE INFLUENCE OF GENERALIZED BUBBLE DISPLACEMENT ON THICK PLATE RECTANGULAR ELEMENT
    引入广义状型位移场影响的厚板矩形单元
短句来源
    The instantaneous stream-wise velocity distribution near the hydrogen bubble generating wire was calculated from the data of the digitalized timelines.
    离开氢气发生线最近的两条氢气时间线的前缘间距,或后缘间距,和氢气时间线的时间间距,获得流速分布。
    Stability Analysis of Framed Structures by Finite Element Method Using Bubble Functions
    杆系结构稳定分析的函数有限元法
短句来源
    Hydrogen Bubble Particle Image Velocimetry Technique and Its Primary Application
    氢气粒子图像测速技术及初步应用
短句来源
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  “bubble”译为未确定词的双语例句
    Analysis on the Accuracy of Bubble Dynamic Equations
    关于空泡动力学方程精确度的分析
短句来源
    Influences of a Plane Wall on Bubble Motion
    平壁对空泡运动的影响研究
短句来源
    CHAOS PREDICTION OF HYDRODYNAMIC BEHAVIOR IN GAS-LIQUID TWO-PHASE BUBBLE COLUMN WITH SINGLE ORIFICE
    气液两相单孔鼓泡流体动力学行为混沌预测
短句来源
    Numerical Investigation of Nonlinear Dynamics of Cavitation Bubble Motion
    空泡运动非线性动力学特性的数值研究
短句来源
    Contrast research on movement rules of spherical bubble under the turbulent coherent structure and non-turbulent coherent structure
    近壁空泡基于非拟序结构与拟序结构的运动规律
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  bubble
It produced no air bubble in the adhesives layer under the condition of no vacuum environment, and ensures the assembly dislocation ?0.
      
This paper attempted to numerically analyze the action process based on damage mechanics when a jet created by bubble collapse acted on the bearing surface in the process of cavitation erosion.
      
An effective medium method is developed for the slightly compressible elastic media permeated with air-filled bubbles, according to the nonlinear oscillation of the bubble, which happens when compressional wave travels through the porous media.
      
Two flow regimes were discovered by measuring flow rate vof water through thin capillaries containing small gas bubble.
      
The longer the bubble, the greater this contribution.
      
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Many studies on cavitation phenomena were based on the theory of single bubble motion which was first put forward by Rayleigh in his 1917 article and later developed by Plesset et al.[1]. By this theory, only some effects of forces were taken into consideration from hydrodynamics leaving out any thermodynamical effects such as matter interchange between liquid and gaseous phases. Strictly speaking, the theory may be suitable for discussing expansion or/and contraction motion of a bubble formed in...

Many studies on cavitation phenomena were based on the theory of single bubble motion which was first put forward by Rayleigh in his 1917 article and later developed by Plesset et al.[1]. By this theory, only some effects of forces were taken into consideration from hydrodynamics leaving out any thermodynamical effects such as matter interchange between liquid and gaseous phases. Strictly speaking, the theory may be suitable for discussing expansion or/and contraction motion of a bubble formed in liquid,but this theory does not cope with cavitation behaviors in general. In this paper,the cavitation conditions and similarity problems are discussed with thermodynamic effects taken into consideration in addition to the hydrodynamic ones.

有关空化现象的理论研究大多建立在1917年由Rayleigh开始的,后由Plesset等人发展起来的单个空泡运动理论的基础上.该理论仅从流体动力学的某些观点出发,考虑了力的作用,对诸如水下爆炸等问题的讨论,无疑是合适的.由于忽视了空泡生长或消失过程中气、液两相间的物质交换及能量转化,因此对空化现象的讨论则认为是不完备的. 本文主要从热力学观点.分析高速水流中的空化现象、空泡形成条件、空化数以及讨论空化模型实验的相似性问题.

According to the summary of the fiberglass reinforced phenolic plastics ablation mechanism,a theoretical model is suggested and a calculation method of the ablation parameters is given.The basic characteristics of this model are.melted fiberglass forms a continuum liquid layer which contains some particles of pyrolysis char and a equilibrium chemical reaction between silica and carbon occurs in it.In the analysis,competition between silica-carbon reaction and lateral flow for the removal char,further reaction...

According to the summary of the fiberglass reinforced phenolic plastics ablation mechanism,a theoretical model is suggested and a calculation method of the ablation parameters is given.The basic characteristics of this model are.melted fiberglass forms a continuum liquid layer which contains some particles of pyrolysis char and a equilibrium chemical reaction between silica and carbon occurs in it.In the analysis,competition between silica-carbon reaction and lateral flow for the removal char,further reaction between silicon carbide and excessive silica at the ablationsurface,the surface vaporization of glass,the combustion of pyrolysisgas in the gas boundary layer,and the gas bubble effect on physical properties of liquid layer are considered.A simplified method for relative low viscosity fiberglass reinforced plastics ablation is given.Theoretical results are in encouraging agreement with experiment.

本文在总结玻璃纤维增强酚醛塑料烧蚀机理的基础上,提出了一个理论模型,并给出烧蚀参数的计算方法。理论模型的主要特点是:认为玻璃纤维熔化后形成了内含热解炭粒的连续液体层和碳与二氧化硅在液层中发生了平衡的化学反应。在分析中考虑碳硅反应和侧向流动消耗热解炭的竞争;碳化硅在烧蚀表面与过量二氧化硅间的进一步反应;玻璃表面蒸发;热解气体在气体边界层中的燃烧;及气泡对液层物理特性的影响。对低粘性玻璃纤维增强塑料烧蚀,还给出了简化计算方法。理论计算与实验结果的比较表明,两者符合得很好。

The observations were made by hydrogen bubble method in a water channel 6.8 m long by 0.4m wide and 0.3m deep. A flat plate 6m long was set along one side of the channel. After the observations of TBL structures in zero pressure gradient flow, a curved wall was set opposite to this plate to form a two-dimensional convergent-divergent passage as shown in Pig. 1. There were small separated bubbles appearing intermittently at x = 200 to 300 mm but no separation in the downstream part. Plate 1 is a plane...

The observations were made by hydrogen bubble method in a water channel 6.8 m long by 0.4m wide and 0.3m deep. A flat plate 6m long was set along one side of the channel. After the observations of TBL structures in zero pressure gradient flow, a curved wall was set opposite to this plate to form a two-dimensional convergent-divergent passage as shown in Pig. 1. There were small separated bubbles appearing intermittently at x = 200 to 300 mm but no separation in the downstream part. Plate 1 is a plane view of TBL on this flat plate in zero pressure gradient flow taken at y+ = 8.4, Rθ = 1200. Plate 2 to 6 are the plane views and the side views of TBL on this same flat plate in the divergent passage at x - 100 to 300 mm and y = 1 to 4 mm. In this adverse pressure gradient flow the low speed spots (regions where the hydrogen bubble lines are dense) are as wide as the high speed spots as shown in Plate 2, 3, 4, while in the zero pressure gradient flow the low speed regions are narrow streaks (usually called low speed streaks) as shown in Plate 1. In the interior of a low speed spot (also high speed spot) the hydrogen bubble lines were uniform and smooth, there was no trace of chaotic flow. Generally the chaotic flow appeared only at one of the two side edges of each low speed spot, at the chaotic side the hydrogen bubble lines concentrated into a narrow dense white long streak with distorted non-smooth edges and hydrogen bubbles were diffused from there, while at the opposite side the hydrogen bubble lines remained smooth. The different flow features of the two side edges of each low speed spot were shown clearly in Plate 2, 3, 4. These dense white long streaks extended far down-stream and were similar to those streaks in zero pressure gradient flows. The side views show many large transverse vortices. In Plate 5 fluid at 'A' was raised up and at 'C' was pushed down to wall by a vortex. In Plate 6 the fluid at 'A' was farther from the bubble wire than the free stream part of the same hydrogen bubble line, therefore it should have flowed faster than the free stream.

用氢气泡法观测了水槽中二元扩散段逆压区湍流边界层的拟序结构。正面观测所得的快斑与慢斑和侧面观测所得的涡状运动等图象都显著地与于无压力梯度时的不同。慢斑较宽,慢斑内部流动平静,慢斑边缘产生紊乱流动。涡较大,可看到涡的诱导作用。

 
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