一般通过实验的方法求得，即运用牛顿冷却公式求出管外对流换热系数，进而求得管外努谢尔数。
It is generally obtained by the experimental method, namely using Newton cooling formula to get tube outside heat transfer coefficient, then get the tube outside Nusselt number.
论述了风冷发动机冷却风扇的试验法和用无因次特性系数法制取风扇特性曲线的方法。
This paper describes the methods of fan testing and making fan property curve by dimensionless characteristic coefficient for the cooling fan of air-cooled engines.
质量浓度为5%的悬浮液在在整个质量流量范围内总是表现出比水好的冷却性能，它对应的是更低的壁面温度以及更好的传热系数。
The 5% suspension always shows better cooling performance than water with lower wall temperatures and enhanced heat transfer coefficient within the whole range of mass flow rates.
同时也获得了多股射流冲击冷却的对流换热系数等值线谱图。
The isograms of heat transfer coefficients of impingement cooling are also obtained.
通常，对流换热系数是在实验中以电加热试验管壁面后根据牛顿冷却定律计算得来的。
Normally, coefficient of convective heat transfer is gotten through experiments which is heating testing tube by electricity and computed through Newton cooling law.
工作辊与冷却液之间对流换热系数的确定是轧辊温度场分析的难点。
It is usually difficulty to obtain film coefficients between the working roll and the coolant fluid as we solve the temperature field of the roll.
淬火过程中表面换热系数是反映界面能量传递和介质冷却能力的重要物理参数。
Surface heat transfer coefficient is an important physical parameter which reflects energy transfer of interface and cooling capability of medium.
常规跨临界二氧化碳空调循环的性能系数对气体冷却器出口工质温度十分敏感，该温度越低，同等条件下性能越好。
The COP of conventional trans critical carbon dioxide air conditioning cycle depends strongly on the working fluid temperature at the gas cooler outlet.
着重介绍了气膜冷却、涡轮叶片内流冷却技术和气膜孔流量系数的研究进展。
Particular emphasis is given to the development of film cooling, internal cooling technologies and film hole discharge coefficients.
本文用数值方法计算了无气膜冷却涡轮叶片上包括前驻点的整个型面上的换热系数。
Several problems involved in the prediction of heat transfer coefficient on the turbine blade profiles without film cooling are studied in this paper for the purpose of improving the accuracy.
用实验和数值计算相结合的方法，得到半圆柱壳体快速冷却过程中内外表面的非线性表面换热系数。
Non linear surface heat transfer coefficient is obtained by experimental and numerical methods and the CCT diagram is simulated by mathematical transformation.
与圆形孔相比，位于喉部上游位置收敛缝形孔既具有好的冷却效率又具有低的损失系数。
Compared with cylindrical holes, the converging slot holes at the upstream of the throat exhibit both higher cooling effectiveness and lower aerodynamic loss coefficient.
降低冷却水进口温度和提高其质量流量不仅有利于提高制冷性能系数，而且能降低最佳高压侧压力。
Reducing the inlet temperature of cooling water and increasing its mass flow are favorable to increase refrigerant performance coefficient, and can decrease optimal pressure at high pressure side.
最后通过程序实现计算出冷却水的流量场、速度场、换热系数场等的分布，为玻壳模具温度场的数值模拟提供了必需的边界条件。
The distribution of some field parameters such as the flux, the velocity, and the heat-transfer coefficient computed by the programming provided required conditions for cooling simulation.
通过实验方法测试了以原生长江水为冷却水的换热器污垢热阻和摩阻系数的变化。
The variation of fouling resistance and frictional resistance coefficient of heat exchanger using connate Yangtze River water as cooling water is tested experimentally.
磨削区冷却液的热对流系数已由流体动力学和传热学模型估算得到。
The convection heat transfer coefficient of coolant within the grinding zone has been estimated using hydrodynamic and thermal modeling.
通过对几种不同的气膜冷却对流换热系数的计算方法的归纳总结，提出用相对气膜冷却换热系数的方法来计算气膜冷却时的对流换热。
By analyzing the methods of calculating different heat transfer coefficients, the film cooling relative heat transfer coefficients was used to calculate the heat transfer.
物料加热表面受到对流冷却，并讨论了物料的吸收系数，折射率，导热系数，换热系数，物料表面辐射特性对温度场的影响。
The effects of absorption coefficient, refractive index, heat conductivity, convective heat-transfer coefficient and radiative properties of the surf ace on the temperature field are discussed too.
基于边界条件替换方法建立了高炉冷却壁本体和捣打料与炉气之间的换热系数计算模型。
A calculation model of the coefficient of heat transfer between gas and stave body and inlaid refractory is built based on the substitution method of boundary condition.
该系数用于解决金属和冷却水之间的传热，即反映结晶器的传热能力。
This coefficient was used to solve the heat transfer between the melt and cooling water, namely the heat transfer capacity of the mold.
通过对铜冷却壁的传热过程分析，得到热面复合传热系数的计算公式。
A formula of combined heat transfer coefficient was obtained based on the analysis of heat transfer of copper staves.
实验结果表明：在热流密度和旋转速度相同的条件下，采用介质R12可以获得较高的平均换热系数，冷却效果也优于以H2O为介质的冷却效果。
The results have shown that the characteristics of the thermal driving of R12 are similar with those of H2O, but with better cooling effect that H2O.
进一步研究了在结霜过程中空气冷却器的传热面积、传热系数以及空气侧压降与霜层生长的变化关系。
Through expounding the calculation process of the external wall, roofing, floor and door and window heat transmission coefficient, the article investigates the energy-savingc alculation.
冷却塔填料表面传热传质过程的理论计算都与一个经验参数——传质系数有关。
The theoretical models for description of the heat and mass transfer on surfaces of fillers in cooling towers are related to an empirical coefficient the mass transfer coefficient.
计算了不同对流换热系数和冷却水温度对晶体温度的影响。
The influences of heat transfer coefficient and cooling water temperature on crystal temperature are computer.
分别以冷却牛肉和花生为样品，建立了辐解形成的标识性碳氢化合物浓度-剂量线性回归方程，相关系数r2达到0.99以上。
For chilled beef and peanut, the linear regression equations between the concentration of specific hydrocarbons and dose were built with the correlation coefficient R2 more than 0.99.
在不计燃气机缸体冷却热的条件下，一次能源利用系数仅供热时达0 .97，同时供热供冷时可达1 .74。
The primary energy ratio reaches 0.97 for heating only and 1.74 for cooling and heating concurrently, not accounting for the …
实验结果表明，系统运行时的最大制冷(热)系数取决于系统的蒸发温度和气体冷却器出口温度。
Results from the experiment show that there exists a maximum coefficient of performance and it depends on the evaporation temperature and outlet temperature of the gas cooler.
实验结果表明，系统运行时的最大制冷(热)系数取决于系统的蒸发温度和气体冷却器出口温度。
Results from the experiment show that there exists a maximum coefficient of performance and it depends on the evaporation temperature and outlet temperature of the gas cooler.
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