1)  Heat transfer model
传热数模
2)  heat transfer
传热
1.
Experimental Research Progress of the Falling Film Evaporation Heat Transfer of Horizontal Tubes;
水平管降膜蒸发传热的实验研究进展
2.
Application of neural networks to heat transfer calculation in a round billet continuous casting mould;
神经元网络应用于圆坯连铸结晶器传热计算
3.
3D heat transfer model in laser deep penetration welding based on real keyhole;
基于实测小孔的激光深熔焊接三维传热模型
3)  heat conduction
传热
1.
The self-made Finite Variation Method was adopted to simulate digitally the mixed powders' heat conduction process and preheated results by 2D simplify model.
以Ti和C混合粉末的自蔓延燃烧对W-Ti混合粉末进行预热,对混合粉末的热物性参数进行计算,采用有限差分方法对简化的非稳态传热过程及预热效果进行数值模拟,分析材料热物性、燃烧粉末与待预热粉末的质量比等对预热效果的影响。
2.
In this paper,a suitable mathematical model for heat transf er pro cess-ing of batch furnace body is put forwards according to the one dimensional unsteady heat conduction.
将间歇窑窑体传热过程按一维不稳定传热建立相应的数学模型,用计算机计算,研究了间歇窑连续化操作问题。
3.
Separate type heat exchanger not only has a heat conduction efficiency as high as that of a single heating tube,but has a good adaptability to large sca.
介绍了热管传热原理及分离式热管加热炉的工作原理、结构特点。
4)  heat transport
传热
1.
Flow dynamics and heat transport in turbulent thermal convection;
湍流热对流中的动力学和传热研究
2.
This paper mainly described the experiment data process and some constants fitting based on preparing process and heat transport tesing of porous surface tube, and test the semi-empirical equation of boiling temperature departure with wall temperature tesing, comprehensively analogized the mechanics of enhanced boiling heat transporting.
在表面多孔管制备工艺及传热性能测试的基础上,着重阐述试验数据的计算处理与某些常数的拟合确定,并用壁温测试法检验沸腾温差半经验公式,综合分析沸腾传热强化的原理。
3.
This paper presents an overview of new advances in the studies of turbulent thermal convection mainly from four areas:turbulent heat transport,coherent structures,large-scale circulation,and turbulent fluctuations in small-scale turbulence.
文章主要从湍流传热、相干结构、大尺度环流和湍流中脉动量的小尺度统计等四个方面,简要地介绍了近年来湍流热对流的一些新进展。
5)  heat-transfer
传热
1.
Recent progress in the studies of preparation and heat-transfer properties of nanofluids;
纳米流体的制备及传热性能研究的现状
2.
Summary of investigation of heat-transfer and mass-transfer during mould-filling process in EPC;
消失模铸造充型过程的传热及传质研究
3.
The performance test of oil radiator and the method of evaluating the comprehensiveperformance of heat-transfer and fluid resistance;
油散热器的性能试验及其评价传热与流阻的综合性能的方法
6)  heat transmission
传热
1.
This article makes a comparison between the construction of data handling and the least square,taking the experience of heat transmission as an example.
本文以传热实验为例,比较了实验数据处理的作图法与最小二乘法,通过计算机处理数据,对最小二乘法进行了回归。
2.
Based on the existed simulation program of solidification process,the influence of convection and radiation upon heat transmission in the solidification process had been thought over,then a simulation program comprehensively considering the heat conduction,convection and radiation had been developed.
针对残余应力的计算 ,结合铸造中落砂工艺 ,对落砂前后不同的传热模型进行了相应的调整。
3.
The influence of heat transmission on preparationof methamidophos is discussed in this paper.
本文分析了传热对甲胺磷反应过程的影响,在新装置的设计中采取了深冷盐水集中冷却反应釜、取消氯化物水洗釜盐水盘管、采用静态混合器等强化反应传热的措施,装置建成后甲胺磷原油含量达到74%,质量高于同类装置。
参考词条
补充资料:连铸坯凝固传热数学模型


连铸坯凝固传热数学模型
mathematical model of heat transfer for solidification of continuous casting slab orbillet

介鬓_一向外界传热的速率。而坯壳传递热量的多少又决定于图1铸坯内的体积单元钢种的热物性、铸坯经历的不同冷却区的边界条件以及浇铸工艺参数。因此,可以根据铸坯在结晶器、二冷体的对流传热。(4)钢的热物理常数如密度p、导热系区和辐射区所导出的热量与来定量了解铸坯在运动过数*和比定压热容:p均不随温度而变化。(5)操作过程中凝固壳(厚度)的生长、铸坯内的温度分布以及液程为稳定态。如拉速、钢水温度和结晶器钢液面都是稳相穴的延伸长度即凝固终点等,这对于工艺参数的优定的。根据建立数学模型的步骤,做体积单元体的热平化、铸坯质量的改善和连铸机设计等方面都具有十分衡,即可得到以下偏微分方程:…ha…一鑫)囊叮挤铸圆坯,(半径加,应用圆坐标系,方程式(‘’铸。合。一如一争的边界条件是:可变为。一_ J~~a‘扩 a一犷、.又扩、犷』、x一于一又幸一0 子(冰等)+于(笼)=户c户污(4)乙既(9) 十“..十z’r、于‘一尸甜’一‘__ b扩 用上述热传导方程来预见铸坯的温度分布,必须x一言一“言一。确定铸坯中体积单元从结晶器弯月面开始,以拉速二以上方程式(1)(或式(2)一式(4))加上初始条件式(5)向下运动的初始条件,以及经过结晶器、二冷区和辐射和边界条件式(6)一式(9)构成了连铸坯凝固传热的数区的铸坯表面边界条件。学表达式。解此热传导方程式就可得到整个铸坯断面 (1)初始条件:规定在开始浇注时(t一0)结晶器弯的温度分布。月面钢水温度等于浇注温度Tc。求解方法求解偏微分方程的方法有解析法和数 拼。,o镇x(。,o簇y越b,T(二,y)一T。(5)值法。解析法是对偏微分方程积分可得到精确解,但是 (2)边界条件:铸坯内热流是连续的。铸坯表面的由于连铸过程的复杂性,需做许多假设(如钢的导热系边界条件在各冷却区是不同的。数为常数等),求解极为烦杂,适用性也差。现在广泛应 在结晶器内:用的是数值法求解,将偏微分方程化为差分方程,为此 二一0,一群t一、必搏建铸妙哗l男垫售二性鲤为外坚碍杏板兰 -一’一改{二一。”(6)结晶器钢水弯月面以下板坯厚度1/2的区域取一薄 ,一0,一引,_厂。竺竺三盆)份乡少目贵磐岌黔,鬓鬓忙夔 叮’夕一。温度均匀并以中心点代表一个结点,两个结点之间距式中绪为凝固坯壳传给结晶器的热流密度。由于结晶器传热的复杂性,很难从理论上进行计算。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。