助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   对流 在 动力工程 分类中 的翻译结果: 查询用时:2.093秒
图标索引 在分类学科中查询
所有学科
动力工程
气象学
航空航天科学与工程
力学
天文学
金属学及金属工艺
物理学
建筑科学与工程
材料科学
更多类别查询

图标索引 历史查询
 

对流     
相关语句
  convection
    Augmentation and Optimization on Heat Conduction and Convection Processes
    导热和对流换热过程的强化与优化
短句来源
    Temperature Imbalances in Convection Superheater and Reheater Panels of Utility Boilers
    电站锅炉对流过热器和再热器的同片热偏差
短句来源
    An Experimental Study of the Influence of the Gap Spacing on Natural Convection in Horizontal Annuli at Small Ra Numbers
    小Ra数时套管间距对自然对流影响的实验研究
短句来源
    EXPERIMENTAL STUDY ON SIDE EFFECT OF NATURAL CONVECTION CHANNEL FLOW BETWEEN ISOTHERMAL VERTICAL PLATES
    等温竖平板通道自然对流端部效应的实验研究
短句来源
    Experimental Study of Mixed and Forced Convection from A Small Heat to Liquid Flow in Vertical Narrow Channels
    窄通道内小传热面的混合与受迫对流换热研究
短句来源
更多       
  convective
    Thermodynamic Analysis and Application of Convective Heat Transfer
    对流换热过程的热力学分析及其应用
短句来源
    The Thermal Calculation for Boiler Convective Extended Healing Surface
    锅炉扩展表面对流受热面的热力计算
短句来源
    ON EVALUATION OF EFFICIENCY OF METAL CONVECTIVE HEAT EXCHANGER
    谈金属对流换热器效率的评价
短句来源
    ANALYSIS OF MECHANISM OF CONVECTIVE HEAT TRANSFER
    对流换热的物理机制分析及其应用
短句来源
    Theoretical Analysis to The Convective Characteristic of Heat Transfer in Utility Boilers
    电站锅炉传热对流特性的理论分析
短句来源
更多       
  convection current
    The convection current heat exchange and flow resistance were studied when air crossed the elliptic pin finned tube by using the heat/mass transfer analogy and naphthalene sublimation technique.
    利用热质比拟原理及萘升华技术 ,对空气横掠椭圆钉头管时的对流换热及流阻特性进行了研究。
短句来源
    The convection current heat exchange coefficients on the tube surface and at the elliptic pin top were separately measured,the experimental correlative formula and the total heat exchange coefficient were derived with calculation.
    对管面上及椭圆钉头上的对流换热系数分别进行了测量 ,通过计算得到总体换热系数及流动阻力的实验关联式。
短句来源
    The experimental result shows that the convection current heat exchange coefficient of the elliptic pin finned tube was higher than that of the smooth tube. The flow resistance of the elliptic pin finned tube was smaller than that of the circle pin finned tube,sometimes smaller than that of the smooth tube in the Reynolds Number range regulated by the experiment.
    实验结果表明 ,椭圆钉头管的对流换热系数高于光管 ,在实验规定的雷诺数范围内 ,椭圆钉头管的流阻小于圆形钉头管 ,有时也低于光管
短句来源
  convectional
    Analysis on the Thermal Flow Resistance of a Convectional Microchannel Heat Exchange Control System
    微通道对流换热系统的流动阻力分析
短句来源
    Generally,the discretization method may be used to abtain external convectional heat transfer coefficients between gases and tubes when conducting heat transfer tests of finned tube.
    对于翅片管传热性能试验,管外气体的对流换热系数一般可通过分离法获得。
短句来源
    A correlation between the averaged convectional heat transfer coefficient and the averaged airflow velocity is presented on the basis of calculations for various airflow rates.
    对多种风速的计算结果表明 ,平均对流换热系数与风扇布局基本无关而仅与平均风速有关 ,最后由计算结果得出了平均对流换热系数和平均风速的经验关系式。
短句来源

 

查询“对流”译词为其他词的双语例句

 

查询“对流”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  convection
Mixed finite element method for the convection-dominated diffusion problems with small parameterε
      
for Sobolev equations with convection-dominated term
      
for linear Sobolev equations with convection-dominated term is given.
      
Thermally developing forced convection and the corresponding thermal stresses in a porous plate channel
      
We obtained the pattern of mantle convection for East Asia and the West Pacific.
      
更多          
  convective
Radiative heat transfer in solids and convective heat transfer between the gas and the solid is especially studied.
      
Methods and algorithms of numerical simulation for three-dimensional thermal-convective motions of the inhomogeneous high-viscosity incompressible fluid in the direct and inverse time are described.
      
It is shown that, for univalent cations in the regime of convective diffusion, the coefficient of electrolyte rejection by the membrane correlates with the adsorption potential of cations (counterions) at the pore surface of a selective layer.
      
The gel-layer accumulates considerable surface and bulk charges and is characterized by the high hydraulic resistance hindering the convective ion transport.
      
It is shown that the effective mechanism of the saturation of nanocrystalline materials with impurities is their convective transfer by moving macrodislocations-linear defects of the regular packing of nanograins.
      
更多          
  convection current
We also carried out drying experiments of bead packings saturated with ethanol, at four different velocities of the boundary convection current, and with bead size ranging from 4.5 to 100 μm.
      
A recent investigation of the isospin forbidden electromagnetic transition of40Ca indicated that the convection current calculated in the shell-model should be modified by an "effective charge" to reproduce the transverse form factor.
      
It is shown that the findings of the present experiment are consistent with the interpretation that nuclei are excited by the new M1 mode through the convection current part of the M1 operator.
      
It is shown how the convection current contribution may be evaluated within the restrictions of gauge invariance.
      
Joule heating in this depletion layer and the ensuing temperature gradient, as well as the concentration gradient, give rise to buoyant forces which may create a turbulent convection current.
      
更多          
  convectional
Internal gravitational waves and convectional instability in liquids
      
A method of the analysis of the thermal field dynamics in a core and insulation of a DC lead with convectional heat abstraction
      
The cooling of the system is modeled by the convectional boundary condition.
      
The important role of the convectional flow of water and colloidal spheres for the pattern formation is supported.
      
The broad ring patterns are not formed when a dish is covered with a cap, which demonstrates the important role of the convectional flow of silica spheres and water accompanied with the evaporation of water on the air-suspension interface.
      
更多          
  其他


~~

本文的任务是把上一篇论文的理论引伸到凝结液膜部分湍流条件下的膜状凝结放热.在这个范围里理论分析和实验结果符合的程度达到和层流范围内努谢尔特理论公式和实验结果符合程度相比拟的地步.根据理论分析的结果设计计算的推荐式可采用:Re=0.025((Ga~(1/3)/(Pr·K))~(1.41)这个推荐式给出的放热系数较纯理论式的结果高36%而与实验结果基本一致,同时亦和多种来源的经验公式相近.本文亦给出适用于极低 Pr 数介质凝结液情况的较一般的理论分析.分析的结果指明,对 Pr《1而部分湍流的情况来说,忽略液膜加速度和液膜本身对流所引起的误差较层流时更大。把这个因素考虑在内则此时放热系数的值比努谢尔特公式给出的值更低得多.文章包括了以图表形式表出的最终结果.

In previous papers on transient thermocouple for high gas stream temperature measurements, it was assumed that thermal inertia coefficient of the probe is not variable with wire temperature, and that thermal radiation from the probe may be negligible. But our analysis shows that these methods would make the extrapolated temperature to be greatly underestimated.In this paper, for Chromel-Alumel transient thermocouple used in our experiments, we present a new extrapolation method for determining high gas stream...

In previous papers on transient thermocouple for high gas stream temperature measurements, it was assumed that thermal inertia coefficient of the probe is not variable with wire temperature, and that thermal radiation from the probe may be negligible. But our analysis shows that these methods would make the extrapolated temperature to be greatly underestimated.In this paper, for Chromel-Alumel transient thermocouple used in our experiments, we present a new extrapolation method for determining high gas stream temperature. Therein, according to the experimental data of the specific heat of thermocouple materials, it is assumed that thermal inertia coefficient T varies with wire temperature, and that the variation follows T=T0 (1+at). And radiation effect may also be included. For gas stream temperature up to 2500℃ (velocity about 100m/sec.), the new method gives satisfactory results (errors within±6% as compared with standard values). In our experiments, it is found mat the size of probe thermojuction effects greatly on the extrapolated results. It is also found that the application of the convection heat transfer coefficient a determined by means of a transient thermocouple can make more accurate radiation correction for a steady thermocouple with same size.

以前有关高温气流温度测量的动态热偶法的文章都假定,探头的热惯性系数不随丝温变化,且探头的热辐射可忽略不计。可是我们的分析表明,这样做会使外推出的气流温度大为偏低。本文对于我们实验中使用的镍铬-镍铝热电偶,提出了一种新的推算高温气流温度的办法。其中根据热偶材料的比热实验数据,假定热惯性系数T按T=To(1+at)规律随丝温变化,方法中也可考虑辐射影响。对于最高达2500℃的气流温度(速度约100米/秒),新推算方法给出了令人满意的结果(和标准值比较误差在±6%以内)。我们在实验中发现,探头热结点尺寸对于推算结果有很大影响;还发现,采用动态热偶法实测的对流传热系数α,可以使我们能对同尺寸的稳态热偶作出更精确的辐射修正。

For the development of heat exchangers, the experimental research on industrial equipments under production conditions is as important as the experimental research in laboratories in idealized conditions. In this article, the method for experimental research on industrial equipments under production conditions and the processing of the obtained data are discussed. A general formula for the calculation of industrial heat exchangers is proposed. The author takes the basic heat transfer coefficient Ko, the derived...

For the development of heat exchangers, the experimental research on industrial equipments under production conditions is as important as the experimental research in laboratories in idealized conditions. In this article, the method for experimental research on industrial equipments under production conditions and the processing of the obtained data are discussed. A general formula for the calculation of industrial heat exchangers is proposed. The author takes the basic heat transfer coefficient Ko, the derived coefficient of fauling ε and the heat transfer modifier Ω as the three main factors. Eegressive analysis is used to process the data obtained from the steam superheaters of a utility boiler. The influence of these facitors has been found clearly by this analysis.

工程用的各种换热器的受热面有不同程度的沾污,进出口截面上工质的流速和温皮的分布是不均匀的。若不去探求这种工程上常不可避免的灰污、传热不均匀等主要影响因素的变化规律,而按理论或理想情况下实验得出的传热系数,笼统地乘以简单的一个经验系数来修正,常会引起很大的误差(甚至达百分之几十或几百)。 可靠的换热器工程用传热计算方法,应该是既要立足于传热学基本原理,充分利用理想条件下(洁净工质、流速和温度均匀分布等)的理论研究和实验室测定结果;也还要对实际的换热器进行现场的工程试验研究,寻找各主要影响因素的变化规律。 本文以电站锅炉过热器为例,阐述了换热器的工程试验研究的测试方法,试验数据的回归分析,并探讨了工程换热器的对流传热计算公式的一般形式。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关对流的内容
在知识搜索中查有关对流的内容
在数字搜索中查有关对流的内容
在概念知识元中查有关对流的内容
在学术趋势中查有关对流的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社