传热

Equilibrium equations of a binary mixture for molecular distillation were derived on the basis of heat and mass transfer in liquid films. Simulation on separation of tocopherol from rapeseed oil deodorizer distillate was carried out.

通过对分子蒸馏液膜表面流体流动和传质、传热分析，建立了二维分子蒸馏模型的传质和传热方程，并对菜籽油脱臭馏出物中维生素E的分离进行模拟。

Consequently the diathermancy was strengthened, the effect of heat transfer was improved and the flow and combustion process in the boiler has become much better. First, in this thesis the burn characteristic of the rubbish and the process of combustion in the chain boiler has been studied. A series of mathematic model has been given. This thesis carefully introduced the principle and formula of the turbulent flow model、two-equation model、radiation model、dispersed phase model and standard wall function method. The software FLUENT has been applied to simulate the temperature、pressure、velocity and mass fraction of species in the boiler furnace and stokehole. The analysis and the comparison have been done. The calculation results indicate agreement with the fact and the studies both here and abroad.

首先，本文针对SZL10-1.25-MJ造纸垃圾焚烧锅炉，结合其燃料的特性，对垃圾的燃烧特性以及层燃炉中垃圾的焚烧过程进行分析；给出一套完整的垃圾锅炉炉内传热数学模型，并分别详细阐述了湍流流动模型、双方程模型、辐射传热模型、离散相模型及标准壁面函数的原理及计算公式；借助于Fluent软件平台对炉膛内的温度场、速度场、组分浓度场及炉膛出口的温度分布、速度分布、组分浓度分布等进行数值模拟，分别从定性和定量的角度与实际情况进行了比较，得到了较满意的结果；模拟结果与国内外的很多研究能较好符合。

Based on dimensional analysis, a satisfactory correlation for enhancement of heat transfer is given.

在量纲分析的基础上给出了传热强化时的实验关联式，并评价了前人的5个传热实验关联式。

Optimized calculation shows that, the comprehensive performance of the eddying tube is better than that of the smooth tube, and the comprehensive performance of the eddying tube with minor screw pitch and proper groove depth is excellent.

优化计算表明，旋流管换热系统的传热-阻力综合性能指标优于光滑管换热系统，旋流管的螺距、槽深对旋流管换热系统的传热、压降、功率消耗等影响很大，但是小螺距、适当槽深的旋流管的综合性能是优良的。

The heat pipe is a kind of units with high performance, it has been widely used in heat transfer and energy saving.

热管是一种高效的传热元件，在传热和节能方面的应用越来越多。

At first, by theoretically analyzing the instance of heat transfer on the umbrella-plate evaporator.

首先对伞板的传热情况进行了理论分析，得出了伞板蒸发侧传热系数的计算式。

The heat transfer model of a high pressure generator with fire tubes developed in this paper can forecast the state of heat exchange quantitatively, offere theory gist for experiment research of fire tubegenerator, and can provide important reference for the design of fire tube generator.

本文建立的高压发生器传热模型可对火管式高压发生器的传热效果进行分析，可以为溴化锂机组火管式高压发生器的设计提供重要的参考，可以为火管式高压发生器的实验研究提供理论依据。

The heat transfer model of a high pressure generator with fire tubes developed in this paper can forecast the state of heat exchange quantitatively, offere theory gist for experiment research of fire tube generator, and can provide important reference for the design of fire tube generator.

本文建立的高压发生器传热模型可对火管式高压发生器的传热效果进行分析，可以为溴化锂机组火管式高压发生器的设计提供重要的参考，可以为火管式高压发生器的实验研究提供理论依据。

Studied present measuring methods" advantages and disadvantages, and presented the necessity and importance of researching propellant transient heat transfer.2.according to 130 and aeronautic 90 rocket projectiles" structure, analysed and acquired physical and mathematical models for propellant transient heat transfer, also designed propellant temperature field simulation units for test.3.acquired discrete transient heat balance equation and temperature calculation program, and gave contrasting curves between experimental temperature values and program calculating temperature values as well as maximum errors and average square root errors between them.4.by programs based on the first class boundary condition, worked out temperature distribution in propellant temperature field simulation units at different time, analysed temperature field distribution law and main elements affecting heat transfer, acquired propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.5.established transient heat transfer mathematical model and temperature calculation program for the third class boundary condition, drew contrasting curves between temperature experimental values and calculation values and gave maximum errors and average square root errors between them, got temperature distribution in the simulation unit at different time and main elements affecting heat conduction, figured out propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.

分析了现有测试方法的优缺点，提出了研究推进剂瞬态导热的必要性和重要性。 2。根据130和航90两种火箭弹的结构，分析得到了推进剂传热的物理模型和数学模型，设计了推进剂温度场模拟实验装置。 3。得到了离散形式的瞬态热平衡方程和温度场计算程序，给出了实验温度与程序计算温度值的对比曲线及其最大偏差与均方差。 4。利用程序求出了第一类边界条件下、不同时刻推进剂温度场模拟装置中的温度分布，分析了温度场的分布规律和影响传热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处的温度时间曲线并给出了两者之间的最大偏差与均方差。 5。建立了第三类边界条件下的瞬态导热数学模型和温度计算程序，求出了温度实测值与计算值的对比曲线并给出了两者之间的最大偏差与均方差，得到了不同时刻温度场模拟装置的温度分布与影响导热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处温度及两者之间的最大偏差与均方差，讨论并确定了能代表130和航90推进剂温度的特征点的位置。

The numerical calculation and simulation results show that the effect of the wall surface heat transfer on its internal temperature field is not serious, the cooling shcheme of ventilating duct can control the maximal temperature gradient on the focal surface within 0.4℃/m successfully and the characteristic structure of enclosed wall is effective on the heat transfer.

数值计算与仿真结果表明：壁面传热对其内部温度场的影响不大；利用通风管道的冷却措施可将焦面的最大温度梯度控制在0.4 ℃/m；围挡的特性结构对传热有效。

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。