传热

Another feature of HEDDTB is that its tubes' buddle is composed of tubes with different diameters, which lead to a smaller fluctuation of heat transfer coefficient in the condition of fluctuating flux than that of the heat exchanger with tubes that has the same diameter in the case of low Reynolds number.

异径管束换热器的换热管束由直径不同的管子组成，这种换热管束在低雷诺数下传热系数随流量的波动相对同径管束而言较小，因此异径管束有一定的抗传热系数波动的性能，这使得换热器在流量波动的工况下工作性能稳定。

Coupled with the three-dimensional transient heat conduction equation, a heat treatment furnace is simulated. The temperature of the gas in the enclosures and the steels vary with the time of calefaction.

将辐射传热模型与三维非稳态导热模型相耦合，对一个热处理炉简化模型内传热问题进行了计算，分析了炉内气体温度分布与钢锭温度随加热时间的变化情况，炉内气体温度和钢锭温度分布合理，计算结果可信。

The formulation of transmission function coefficient is derived and dynamic heat flux is calculated.

由于气象条件及汽车的运行的变化，车体及车室的传热过程实际上都是非稳态传热过程。

The Colburn heat transfer factors Jh correlation could describe 96.6% of experimental data and the Colburn mass transfer factors Jm correlation could describe 81.4% of experimental data with an error of ±15%.

开发了反映空气侧传热特性的Colburn传热因子Jh和反映传质特性的Colburn传质因子Jm的关联式，所开发关联式在±15%误差范围内分别能涵盖96.6%和81.4%的实验数据，其平均误差分别为5.3%和8.5%。

The purpose of this paper is to find the proper character of cooling water and the ways of it pass in and out the jet, which make sure that the anode of plasma ignition jet will not be ruined, to prolong the useful life of the pole, by using the numerical analyze in plasma ignition torch against heat transfer of anode and cooling-water against convection current heat transfer, and process the simulation calculation by using FLUENT soft.

本文通过对等离子体点火炬与阳极传热以及冷却水与对流湍流传热的数值分析，运用FLUENT软件进行模拟计算，找出满足使等离子点火器阳极不被烧蚀的冷却水的合理参数及冷却水进出水方式，来延长电极的使用寿命。

To some extent, the nucleate boiling and the two-phase forced convective heat transfer through the liquid film always co-exist in the saturated nucleate boiling zone and two-phase forced convection zone. The liquid fill-ratio, input power and content of the non-condensable gas exert significant influence upon the start-up performance and the heat transfer performance of LHP.

并且在饱和核态沸腾区与两相强制对流区内，总是在某种程度上同时发生着核态沸腾区与两相强制对流液膜传热；充液量、输入功率及其不凝性气体的含量对回路热管的起动性能和传热性能部有很大的影响。

Furthermore the performances of heat transfers including corrugate plate, tube and fin-tube were compared under the same conditions. The results show that when the air frontal velocity is between 2.45 and 4.1m/s, the overall heat-transfer coefficient of plate heat exchanger ranges from 100 to 160 W/m^2/ equal to one sixth of that of fin- tube cooler based on tube outside area, which is about 70% higher than that of tube cooler. The volumetric heat transfer capacity of plate cooler is 1.5 times as that of fin-tube cooler and 15 times as that of tube cooler. The heat transfer capacity of per unit power of plate cooler is 5.5 times as that of tube cooler and similar results for fin-tube cooler.

在相同工况下，比较了波纹板式、光管式和翅片管式空冷器的性能指标，结果表明：迎面风速在2.45~4.1m/s之间，波纹板式空冷器传热系数达到100~160W/平方公尺/℃；约比光管式提高70%，但只有以管束外表面为基准的翅片管式传热系数的六分之一；板式空冷器单位体积换热量约是翅片管式空冷器的1.5倍，是光管式的15倍；板式空冷器单位功耗换热量约是光管式空冷器的5.5倍，而翅片管式空冷器与光管式空冷器则相差不大。

In order to enhance heat transfer efficiency of reboiler which is widely used in petroleum and chemical system, phase change heat transfer and friction characteristics in several heat transfer enhancement tubes are studied, With a view to approach practical circumstances, cumene is chosen as organic working medium.

为了提高石化系统再沸器的传热效率，本文研究了几种强化沸腾与冷凝管的传热与阻力特性。为接近实际条件，选用异丙苯为工质。

In this paper, heat transfer boundary condition of cylinder block water jacket was determined by means of liquid-solid coupled method.

在冷却系统传热计算时，利用流固耦合的方法，较为准确地确定了缸体水套的传热边界条件。

In this paper, we put emphasis on introducing the heat transfer calculation for the "pineapple twisted roll"in the deaerator, including the establishment of the physical model, the determination of heat resistance and the calculation of rise in temperature, etc.

重点介绍了这种除氧器中"菠萝花"的传热计算，包括物理模型的建立、传热热阻的确定、温升计算等。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。