查询词典 transfer coefficient

To investigate the influence of an upstream ramp on film cooling heat transfer coefficient, a numerical simulation method on the distributions of the flow fields and heat transfer coefficient was adopted with different heights of upstream ramp s in several ratios.

为了获得气膜孔上游放置斜坡对气膜孔换热特性的影响规律，采用数值模拟方法研究了斜坡的台阶高度分别为0.3D，0.5D和0.75D时在不同吹风比下的流动过程和换热特性分布情况，并与常规气膜孔冷却结构形式进行了对比。

Take the opportunity of this project, theoretical and experimental researches on the high-efficiency evaporator used in a large quick-freeze equipment have been done. The main work of experimental research is as follows:(1) Compare and analyze the influences of structural parameters on the heat transfer coefficient of an evaporator. The calculation results show that, under non-freezing conditions, the structure possessing the highest heat transfer coefficient is the one with circular fins, equilateral-triangle arranged small tubes and varying fin-spacing.

主要做了以下几方面的试验研究工作：(1)对不同翅片形状、管径大小、翅片管排列方式，以及是否带波纹等结构参数对蒸发器传热系数的影响进行了比较分析，得出在不结霜工况下，具有最高传热系数的蒸发器结构是圆翅片小管径正三角形排列等节距结构的结论。

The dynamics and heat transfer on the spinning line during the air drawing process are discussed in detail, mainly relating the forces acting upon the polymer along the spinning line and the expressions of the air drawing coefficient C〓 and heat transfer coefficient h. By introducing the power-law model as the constitutive equation to describe the theological properties of polymer melt and considering the changing of the density and specific heat capacity of polymer melt at constant pressure with the polymer temperature, the former model of polymer air drawing is improved and a complete polymer air drawing model is established, which is integrated with the model of air jet flow field of dual slot die.

在此基础上，对前人的聚合物拉伸理论模型进行了改进，以幂律模型作为描述聚合物熔体流变行为的本构方程，并考虑了聚合物熔体密度和定压比热随聚合物熔体温度变化而变化这个因素，从而建立了完整的熔喷聚合物拉伸理论模型。

In experiment, The relation between the average heat transfer coefficient, the mass transfer coefficient of phosphate acid falling film and Re number were revealed.

通过实验，考察了磷酸液膜平均传热、传质系数与膜Re的关系。

Then average heat transfer coefficient of building external wall and heat transfer coefficient of building block filling wall by calculating were calculated.

通过公式计算将不同基层墙体条件下的外墙平均传热系数转换至外墙主墙体的传热系数。

Because the limitation of the conventional method,A lot of work were done for the calculation of average overall heat transfer coefficient of building external wall and heat transfer coefficient of building block filling wall needs mass calculation.

由于常规算法的局限性，在实际项目中换算外墙平均传热系数与外墙主墙体传热系数需要计算的工作量较大。

Result and conclusion: The electrochemical experimental results show that the two totally irreversible oxidation peaks in the region of 0.3-1.2 V vs SCE for both MT and SR were observed,and the electrode reactions processes were diffusion-controlled.Their electron transfer number n and electron transfer coefficient α were obtained by CV and electrolysis with coulometry.The diffusion coefficient D and rate constant k f were also calculated by CC and CA.

结果与结论：在0.30~1.2 V电位窗口内，MT和SR均产生1个不可逆氧化峰，并且它们的电极反应均受扩散步骤控制；用控制电位电解库仑法和循环伏安法得到MT和SR的电极反应电子转移数n和电荷转移系数α，运用计时库仑法和计时电流法测定了它们的扩散系数 D 及电极反应速率常数kf。

The effect of micro-orifice spargers on power consumption,gas hold-up ε,oxygen mass transfer coefficient KLα and specific oxygen mass transfer coefficient of power input per volume Eo2 was specially investigated.

着重考察了微孔型分布器对同一组合桨的功耗、气含率ε、氧传质系数KLα以及比功耗传氧系数Eo2的影响，并与传统的环状气体分布器的结果进行了对比。

And the pressure drop of liquid-layer is mainly influenced by weir height. With the increasing of weir height, the pressure drop increases. And it is independent of bare tower velocity and plate dimension. The correlation before was corrected as follows:ΔpL＝3911Z This paper analyzed the heat transfer coefficient between the outer wall of heat tubes and cooling water. And it was considered that plate geometries、weir height、bare tower velocity and heat flux density would affect the heat transfer coefficient.

而液层阻力主要受堰高的影响，堰高越高，液层阻力越大，与空塔速度和孔板的几何尺寸无关，对以往的公式进行修正后得到实验关联式如下：ΔpL＝3911Z 本文对加热管外壁与冷却水之间的换热系数进行了分析，认为孔板的几何尺寸、堰高、空塔速度以及热流密度均会影响换热系数。

In order to verify the accuracy of heat transfer coefficient,2D nonlinear finite element axisymmetric model is established by the means of finite element software MSC.Marc, which is utilized to simulate the transient temperature field coupled with phase transformation process and nonlinear synthetic surface heat transfer coefficient of several typical steels in the different quenchants.

Marc作为模拟平台，建立了淬火过程二维非线性有限元模型，模拟淬火过程中的瞬态温度场，在模拟过程中以多种常用钢在不同淬火介质中的非线性表面综合换热系数为边界条件，同时耦合了相变过程的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。