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heat
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  发热
    The maximum temperature of the vibrator made of titanium alloy or aluminum alloy is about 1/18 of that of 45 # steel without heat treatment.
    钛合金和铝合金试件的内耗发热温升较慢 ,其最高温度约为 4 5 #钢试件的 1/ 18。
短句来源
    DISCUSSION OF THE POWER INPUT OF A FREQUENCY CONVERSATION COMPRESSOR AND ITS FEVER HEAT TESTING STEPS
    关于变频机输入功率和发热测试方法的探讨
    To discuss the potential possibility of the application of boiling with air introduction to the cooling of microelectronic elements, nucleate boiling heat transfer and the temperature overshoot at the incipience of nucleate boiling are examined for n-hexane.
    为了探讨这种通气增强沸腾传热的方法在发热微电子元件冷却中的应用可行性,本文还以正己烷作为沸腾介质,考察了通空气对沸腾传热以及沸腾起始时的壁温过冲的影响。
短句来源
    In order to realize the uniform distribution of temperature field, the group of heat source should be located near the furnace door, and the eddy in upper space could be prevented by reducing gap there.
    要使炉内的温度分布均匀,可考虑在炉门侧加设发热体组,减少顶部的预留空间以防止出现漩涡。
短句来源
    With increasing shaft speed of rotation, heat evolution and temperature rise become a critical problem.
    由于轴的转速越来越高,轴承的发热和温升是个突出矛盾。
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  “heat”译为未确定词的双语例句
    Analysis and Efficiency Calculation of Industrial Heat Energy Application
    工厂企业热能利用的分析及效率的计算
短句来源
    Methods for Selecting Surfaces of Plate-Fin Heat Exchanger
    板翅式换热器翅片表面的选择方法
短句来源
    AN ADIABATIC CALORIMETER IN 77-300K TEMPERATURE MEASURING SPECIFIC HEAT OF SOLID POWER
    用于77—300K固体粉末比热测量的绝热量热器
短句来源
    10kW Heat Pipe—Heat Sink Development
    10kw热管—散热器的研制
短句来源
    Influence of Viscoelasticity of Fluid on Turbulent Flow and Heat Transfer
    流体粘弹性对湍流流动与传热的影响
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  heat
As applications, the wave equation on?+ × ?+ and the heat equation in a semi-infinite rod are considered in detail.
      
In a much cited article, Yau [5] proved that when the Ricci curvature is bounded uniformly below, then the only bounded solution to the heat equation ?tμ=Δμ on [0, ∞) × M which vanishes at t=0 is the one which vanishes evarywhere.
      
Well-posedness of a semilinear heat equation with weak initial data
      
In the first part the initial value problem (IVP) of the semilinear heat equation with initial data in is studied.
      
For the analogs of the heat and wave equation, we give algorithms for approximating the solution, and display the results of implementing these algorithms.
      
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Auther of this paper makes estimations of the thermal efficiencies of the present day different types of prime movers.Based on that,from the point of view of thermodynamics,he suggests some ideas to improve the prime mover efficiencies.He suggests to pay equal attention to the heat genera- tion at the high temperature side and heat rejection at the low temperature side.He also suggests to use some vapor vaporised at supercritical pressure as working medium at the low temperature side,makes some preliminary...

Auther of this paper makes estimations of the thermal efficiencies of the present day different types of prime movers.Based on that,from the point of view of thermodynamics,he suggests some ideas to improve the prime mover efficiencies.He suggests to pay equal attention to the heat genera- tion at the high temperature side and heat rejection at the low temperature side.He also suggests to use some vapor vaporised at supercritical pressure as working medium at the low temperature side,makes some preliminary looks for these working mediums and estimates the thermal efficiecy that may possibly be obtained.

本文作者就现有的各种通用的动力机的热效率作了综合性的估计,在此基础上,从热力学的观点,提出了若干原则性改进热效率的意见,作者认为除了在高温吸热方面应当注意外,低温放热方面也应当重视。最后作者建议低温方面可以采用某种在超临区蒸发的蒸汽,对这种可能的工质作了极初步的探索,并对可能获得的热效率作了估计。

This paper discusses the availability function, giving general formula for calculating the losses of useful work in all kinds of thermodynamic processes. By means of this function, a stream diagram may be drawn, by which we may discus and analyze the effectiveness of thermodynamic cycles-A Method of Second-Law Analysis.This mcthod of analysis can be used generally in finding the efficiencies of all types of heat engines, and in analyzing the combined cycles of power plants.In order to illustrate the usefulness...

This paper discusses the availability function, giving general formula for calculating the losses of useful work in all kinds of thermodynamic processes. By means of this function, a stream diagram may be drawn, by which we may discus and analyze the effectiveness of thermodynamic cycles-A Method of Second-Law Analysis.This mcthod of analysis can be used generally in finding the efficiencies of all types of heat engines, and in analyzing the combined cycles of power plants.In order to illustrate the usefulness of this raethod, examples for analyzing power plants and heat pumps are given.

本文綜合論述可用能函数的热力学基础,有最常見的热力过程可用能量损失的計算公式。文中以这一函数为基础,作出实际循环的可用能流图,对循环的热力学完善性进行分析和評价——第二定律分析法。这种方法可把各类热力机械的效率指标統一起来,便于分析现代綜合的热力循环,对能量的合理利用提供了理論上的依据。文中还通过正循环和逆循环的实例,具体討論这种方法在力能装置和热泵中的应用。論述中作者說明了这种方法的重要性並从力能角度提出“数量分析”和“质量分析”的概念。

In the application of fluidization to chemical metallurgy, many processes involve the transport of heat and mass both inside a particle and between the particle and the surrounding fluid. The term, mixed specific resistance, R′(R′=Nu′=hD_p/k_s and R′=Sh′=h_DD_P/D_s for heat and mass transfer, respectively), is proposed, through which, by means of the curve shown in Figure 2, it is possible to estimate the fraction of total resistance due to transfer inside the particle, thus permitting one to ascertain...

In the application of fluidization to chemical metallurgy, many processes involve the transport of heat and mass both inside a particle and between the particle and the surrounding fluid. The term, mixed specific resistance, R′(R′=Nu′=hD_p/k_s and R′=Sh′=h_DD_P/D_s for heat and mass transfer, respectively), is proposed, through which, by means of the curve shown in Figure 2, it is possible to estimate the fraction of total resistance due to transfer inside the particle, thus permitting one to ascertain whether or not a given transport process can be effectively hastened by dilute-phase technique.The effectiveness of dilute-phase technique in accelerating transport processes is primarily due to the unique characteristics of its particle-fluid dynamics. After an analysis on the fixed bed, a single particle in a fluid, and the dense—and dilute—phase fluidized systems, the present paper points out that a differentiation should be made between the local transfer coefficient and an apparent value based on the entire system. For densephase fluidization with gases, for example, the latter may be lower than the former by 2—3 orders of magnitude. This tremendous disparity is mainly caused by the back-mixing of both the particles as a group and of the fluid, as well as by the heterogeneous nonuniformity characteristic of may a particle-fluid system. Based on the present analysis, which is duly supported by experimental evidence, it is shown that dilute-phase technique can be used effectively to reduce back-mixing and to suppress the heterogeneous nature in nonuniform velocity fronts, thus raising the values of apparent transfer coefficients to the range of the local coefficients of the idealized single particle model. From the point of view of system pressure drop, too, dilute-phase fluidization represents much lower power consumption than the corresponding fixed bed or dense-phase operation.

在流态化冶金中許多过程包含顆粒內部和顆粒与其周围流体之間的传热和传貭,本文提出了一个混合对比阻力R′(对于传热和传貭分別为R′=Nu′=hD_P/k_s,R′=Sh′=h_DD_P/D_s),通过图2的曲綫来近似地計算顆粒內部传递过程占总传递过程阻力的分数,从而可以确定哪些过程可以有效地通过稀相技术来加速。稀相技术在提高颗粒—流体界面传递速度的显著效果有賴于稀相流态化中顆粒—流体的流动特点。本文分析了固定床、单顆粒和浓相、稀相流态化床中颗粒与流体的运动,并指出顆粒—流体间的传递系数可以分为局部的真值和系統的表观值两种,对浓相流态化床而言,后者可低于前者2—3个数量級。此巨大差别主要是由于顆粒羣的、流体的返混以及流速分布的非齐次性所致。根据分析和实驗数据,稀相操作是减少返混和降低流速分布非齐次性的有效措施,从而可以提高表观传递系数,使其接近于(甚至超过)单顆粒的理想数值。从系統压降的分析,稀相流态化的能量消耗亦将远远低于固定床和浓相流态化。

 
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