查询词典 transfer coefficient

Whether there is a significant effect of surface thermal conductivity on heat transfer coefficient in dropwise condensation is a problem that has yet not been settled hitherto.

本文的主要研究工作如下：（1）应用随机分形模型构造了液滴的空间和尺度分布，在此基础上首次建立了珠状凝结换热数值模拟的数学模型。

Furthermore, dropwise condensation heat flux and heat transfer coefficient are increased with the higher steam saturation temperature near the atmospheric pressure.

在大气压附近，热通量和冷凝传热系数随蒸汽的饱和温度的升高而增大。

And heat transfer coefficient of dropwise condensation on several surfaces was measured accurately with Hewlett-Packard 3852A Data Acquisition/Control Unit.

最后，又利用HP3852A数据采集系统，研究了滴状冷凝的动态特性，并用直接测温法测定了几种表面的滴状冷凝传热系数。

An investigation on the local heat transfer coefficient of a helically segmented finned tube surface in a tube bundle was conducted by experiment in cooperation with numerical calculation.

对齿型螺旋肋片管管束内部沿管表面周向的局部放热系数进行了研究。

In addition,the effects of louver angle and the exchange zone length on the pressure drop and the heat transfer coefficient are studied for louvered fin optimization design.The results show that the louvered angle has distinct effect on th...

在深入揭示百叶窗翅片流动机理的基础上，进一步比较了百叶窗翅片开窗角度La和换向区长度S对其传热和流动阻力的影响，分析结果为百叶窗翅片的模具制作及其优化设计提供了依据。

It was shown in our experiment that boiling heat transfer coefficient of forced liquid nitrogen flow in lunate channel is 3～5 times larger than that in smooth tube.

摘 要：对液氮在0.5～1.5mm狭缝通道内受迫流动沸腾换热的情况进行了研究。

It was shown in our experiment that boiling heat transfer coefficient of forced liquid nitrogen flow in lunate channel is 3～5 times larger than that in smooth tube.

对液氮在0.5～1.5 mm狭缝通道内受迫流动沸腾换热的情况进行了研究。

It was shown in our experiment that boiling heat transfer coefficient of forced liquid nitrogen flow in lunate channel is 3～5 times larger than that in smooth tube.

狭缝强化传热是一种新兴的强化传热技术，它具有温差小、传热效率高的特点。

Existence of critical convective heat transfer coefficient h c shows that for naturally cooled monobloc barrel, large h and small δ is selected when strength and manufacturing processes are considered simultaneously.

临界对流传热系数hc的存在表明，对自然散热条件下单筒身管来说，在重量、刚度允许条件下，增加壁厚可以达到降低内膛温度的目的；就主动冷却身管而言，选择大h、小δ时需兼顾强度和制造工艺性。

For naturally cooled monobloc barrel, its thermal condition in regular regime can be evaluated by measuring the outside temperature of two arbitrary rounds;(2) During a sustained firing process, unsteady heat conduction exists in a monobloc barrel, whereas unsteady and quasi steady heat conduction exist with actively cooled composite barrels, meaning that the thermal condition changes from uncontrolled to controlled;(3) Different combinations of the convective heat transfer coefficient h and thickness of gun barrel δ have much effects on cooling the bore temperature.

利用有限元软件分析了某大口径火炮身管的温度场分布，并对自然散热条件下的单筒身管和主动冷却条件下的复合身管温度场进行了比较，其结果为(1)身管温度场分布存在初始和正规工况阶段，后者的单筒身管热状态可以通过测定任意两发身管外表面温度来评估；(2)持续射击过程中，单筒身管始终处于非稳态导热过程，主动冷却身管则包括非稳态和准稳态两个过程，实现了身管热状态由不可控向可控转变；(3)对流传热系数h和身管壁厚δ的组合对降低内膛温度具有很大影响。

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。