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对流强度
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  convection intensity
     Sensor Tip Optimization for a Thermal Anemometer for Determining Convection Intensity in Quench Baths
     测定淬火槽对流强度的热流速仪探头的优化设计(英文)
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  “对流强度”译为未确定词的双语例句
     Using this model the evaporation constants of UDMH and N2O4 droplets at different environment pressures, temperatures and convective intensities are calculated.
     提出了该种液滴的亚临界非定常蒸发计算模型,应用该模型计算了UDMH和N_2O_4液滴在不同环境压力、温度和对流强度下的蒸发常数。
短句来源
     Using this model, the equilibrium vapovization constants of UDMH and N_2O_4 droplets at different environment pressures.
     应用本模型计算了UDMH和N2O4液滴在不同介质压力、温度和对流强度下的平衡蒸发常数.
短句来源
     Meanwhile, the primary dendrite spacing is decreased and the secondary dendrite branches are restrained.
     并且随着对流强度的加大 ,一次枝晶间距降低 ,二次枝晶的生长被抑制。
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     The results of the fringe image processing indicate that the boundary layer thickness during the α LiIO 3 crystal growth processes is about 0.3 mm and decreases with the convection strength,while the solution is in quiescent state.
     MachZehnder干涉条纹的图像数据处理表明:在静态条件下,aLiIO3晶体生长过程中固液界面边界层厚度约为0.3mm,其边界层厚度随溶液对流强度而减弱。
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     The Nusselt number increases with increases in the strength of the applied magnetic field and in the temperature gradient.
     当磁场梯度方向、温度梯度方向以及重力方向三者相同时,磁流体的热磁对流强度最剧烈。
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  相似匹配句对
     A Convective Index for the Summer Monsoon in the South China Sea and Its Applications
     南海对流强度指数及其应用
     Intensity analysis of natural convection in fluid layer with phase change material particles
     含相变物质流体的自然对流强度评价
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     Anchoring Strength of Rock Bolts
     锚杆支护强度
短句来源
     3.3 Duodenogastric reflux (DGR) : The examination was carried out with Doppler Ultrasound .
     DGR强度
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     antle convection
     地幔对流(讲座)
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  convection intensity
The effects of a local intrusion are limited to convection intensity above the intrusion and have little impact on the fluid flow on a regional scale.
      
The effects of mixed convection intensity and the Prandtl number on the velocity profiles, the temperature profiles, the wall friction, and the heat transfer rate are illustrated for both cases of buoyancy assisting and opposing flow conditions.
      
For the buoyancy-assisting case, the obtained numerical results are very accurate over the entire range of mixed convection intensity from pure forced convection limit to pure free convection limit.
      
The effects of box aspect ratio, the Deborah number λ and the dimensionless retardation time ε on the critical Rayleigh number and convection intensity are investigated.
      
Rain producing processes in convective regions are associated with the water cloud processes regardless of convection intensity.
      
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The evaporation-decomposition process of a liquid hypergolic bipropellant droplet at high-pressure and high-temperature conditions is studied thoroughly, and the model of high pressure equilibrium evaporation for this liguid droplet is presented, in this model there are considerations for droplet surface regression, effects of non-ideal gases, changes of the properties, decomposition and dissociation of the species. Using this model, the equilibrium vapovization constants of UDMH and N_2O_4 droplets at different...

The evaporation-decomposition process of a liquid hypergolic bipropellant droplet at high-pressure and high-temperature conditions is studied thoroughly, and the model of high pressure equilibrium evaporation for this liguid droplet is presented, in this model there are considerations for droplet surface regression, effects of non-ideal gases, changes of the properties, decomposition and dissociation of the species. Using this model, the equilibrium vapovization constants of UDMH and N_2O_4 droplets at different environment pressures. temperatures and convective intensities are calculated. The results indicate that there exists a critical environment pressure at definite temperature for given species above which there is no equilibrium evaporation. For UDMH, when T_∞=3200°K, Le=1, the pressure p?? at which there appears supercritical evaporation equal 54 atm, and for N_2 O_4 P_∞= 120 atm.The results also indicate that the vaporization rate for UDMH is greater than that for N_2O_4. So we can draw a conclusion that under ordinary working conditions of liquid propellant rocket engine UDMH behaves supercritical vaporization and N_2O_4. behaves subcritical vaporization and combustion efficiency is controled by the vaporization rate of N_2O_4. These have been confirmed by testing of liquid propellant rocket engine.

本文详细分析了自燃推进剂组元液滴在高温高压燃烧室环境下的蒸发——分解燃烧过程,提出了该种液滴的高压平衡蒸发计算模型.模型考虑了液滴界面移动、非理想气体效应、流体物性的变化以及组元的分解和离解效应.应用本模型计算了UDMH和N2O4液滴在不同介质压力、温度和对流强度下的平衡蒸发常数.计算表明,存在一个介质界限压力,超过这一压力就达到超临界蒸发.对于UDMH,当T_∞=3200°K,Le=1.0时,界限压力P_∞=54大气压,而对于N2O4,P_∞=120大气压.计算还表明,UDMH的蒸发速度远大于N_2O_4的蒸发速度.因而可以得出结论,在一般液体火箭发动机的工作条件下,UDMH为超临界蒸发,而N2O_4为亚临界蒸发,而且发动机的燃烧效率主要受N_2O_4的蒸发速度所控制.这一结论已为发动机试车所证实.

A set of axisymmetric dynamic equations is used for investigating the effects of horizontal rotating current on convective movement. It is concluded that the configuration of updraft may be changed in the presence of horizontal rotatiog current. By comparison with convection, in the absence of horizontal rotating current, the vertical distribution of changed updraft has an appreciable eharacteristic i.e., the strength of updraft increases in the middle-lower part of convection and decreases in the middle-upper...

A set of axisymmetric dynamic equations is used for investigating the effects of horizontal rotating current on convective movement. It is concluded that the configuration of updraft may be changed in the presence of horizontal rotatiog current. By comparison with convection, in the absence of horizontal rotating current, the vertical distribution of changed updraft has an appreciable eharacteristic i.e., the strength of updraft increases in the middle-lower part of convection and decreases in the middle-upper part of convection, thus the maximum vertical velocity becomes greater and it's height moves down. Furthermore, the thickness of strong convective region reduces. These results should help to interpret such observation facts as supercell's longer life duration, larger strength, and thinner cloud layer than other hailstorm.The adjustment of disturbance pressure field is analysed. It is speculated that the effect of horizontal rotating current on updraft will be realized through the adjustment of pressure field.

用轴对称动力方程组研究对流运动中水平旋转气流的作用,结果表明,有水平旋转气流存在时,将使对流运动中下部的上升气流明显加强,上部减弱,使调整后的垂直气流结构强度增加,强中心高度变低,对流厚度变薄.这有利于解释超级单体的稳定持续发展和对流强度大而云层并不厚的观测事实. 通过对气压场调整的分析,可以认为水平旋转气流对垂直运动的作用是通过气压场的变更而实现的.

The evaporation-decomposition process of a liquid hypergolic bipropellant species droplet at high pressure and high temperature conditions is studied thoroughly, and the model of subcritical unsteady vaporization for this liquid droplet is presented. Using this model the evaporation constants of UDMH and N2O4 droplets at different environment pressures, temperatures and convective intensities are calculated. The results indicate that there exists a critical environment pressure at definite temperature for given...

The evaporation-decomposition process of a liquid hypergolic bipropellant species droplet at high pressure and high temperature conditions is studied thoroughly, and the model of subcritical unsteady vaporization for this liquid droplet is presented. Using this model the evaporation constants of UDMH and N2O4 droplets at different environment pressures, temperatures and convective intensities are calculated. The results indicate that there exists a critical environment pressure at definite temperature for given species above which there appears supercritial evaporation. For UDMH, when T∞ = 3200°K, the critical pressure P∞ is approximately equal to 51 atm, and for N2O4 P∞ = 120 atm. The results also indicate that the vaporization rate for UDMH is greater than that for N2O4. So we can draw a conclusion that under oridinary working conditions of liquid propellant rocket engine UDMH behaves supercritical vaporization and N2O4 behaves subcritical vaporization and combustion process is controled by the vaporization rate of N2O4. These have been confirmed by testing of liquid propellant rocket engine.

本文详细分析了自燃推进剂组元液滴在高温高压环境下的蒸发——分解燃烧过程。提出了该种液滴的亚临界非定常蒸发计算模型,应用该模型计算了UDMH和N_2O_4液滴在不同环境压力、温度和对流强度下的蒸发常数。计算表明,存在一个界限环境压力,超过这一压力就出现超临界蒸发。对于UDMH,当T_∞=3200°K时,界限压力P_∞=51大气压,而对于N_2O_4,P_∞=120大气压。计算还表明,UDMH的蒸发速度大于N_2O_4的蒸发速度。因而可以得出结论:在一般液体火箭发动机的工作条件下,UDMH为超临界蒸发,而N_2O_4为亚临界蒸发,而且发动机的燃烧过程主要受N_2O_4的蒸发速度所控制。这一结论已为发动机试车所证实。

 
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