传热

And then a mathematical model describing the dynamic performance of the reclaim equipment of engine exhaust energy ,which is the most important part in car heater,was established.

对暖风装置中最重要的排气热能回收装置建立数学模型和动态特性仿真模型，通过MATLAB软件对该装置传热特性进行仿真分析。

And then a mathematical model describing the dynamic performance of the reclaim equipment of engine exhaust energy, which is the most important part in car heater, was established. Moreover, the heat transfer performance was analyzed in MATLAB.

对暖风装置中最重要的排气热能回收装置建立数学模型和动态特性仿真模型，通过MATLAB软件对该装置传热特性进行仿真分析。

Da Niudi DF2 gas well study shows the average overall heat transfer coefficient drops from 43w/m2.k to 2.57 w/m2.k when the casing head pressure decreases from 16MPa to 0.11MPa.

大牛地DF2井计算表明：当套压由16MPa降低至0.1MPa，井筒总传热系由34 W/降为2.57 W/，井口流温由6.2℃上升至20.2℃，有效的防治水合物在井筒中生成

The flow status of liquid metal in the sand box of group casting was discussed according to the fluid mechanics and heat transfer theory. Not only does the appearance of vying liquid metal happen when group casting between the big and small castings, identical castings in the multiple gates system appear too, even one casting.

运用流体力学、传热学原理，分析群铸时液态金属在各型腔内的流动情况，揭示出争铁液现象不仅在大小件混铸时发生，在多个内浇道浇注系统中群铸相同铸件，甚至仅一个铸件仍存在这一现象。

According to heat load source of die cavity, temperature distribution gradient equations and heat flux equations and the peak value equations of temperature load at die cavity surface have been obtained with research of temperature distribution and transfer laws of die surface by unsteady heat transfer theory.

摘要根据锻模型腔热负荷来源，通过非稳态传热理论，分析研究了模具工作表面层的温度分布与传递规律，给出了型腔表面温度分布梯度和热流密度公式，并给出了锻模型腔表面的温度负荷峰值的计算公式。

According to heat load source of die cavity, temperature distribution gradient equations and heat flux equations and the peak value equations of temperature load at die cavity surface have been obtained with research of temperature distribution and transf

摘要根据锻模型腔热负荷来源，通过非稳态传热理论，分析研究了模具工作表面层的温度分布与传递规律，给出了型腔表面温度分布梯度和热流密度公式，并给出了锻模型腔表面的温度负荷峰值的计算公式。

According to heat load source of die cavity, temperature distribution gradient equations and heat flux equations and the peak value equations of temperature load at die cavity surface have been obtained with research of temperature distribution and transfer laws of die surface by unsteady heat transfer theory.

新闻摘要：根据锻模型腔热负荷来源，通过非稳态传热理论，分析研究了模具工作表面层的温度分布与传递规律，给出了型腔表面温度分布梯度和热流密度公式，并给出了锻模型腔表面的温度负荷峰值的计算公式。

The energy balance of flue gas, radiative heat transfer equations and zero dimensional model of heat transfer are derived in the multiple combustion boiler combining a chain grate with a pulverized coal, considering the radiation heat between the lower and upper zone in the furnace.

将链条炉排加煤粉复合燃烧锅炉的炉膛分成上下两部分，导出了上下炉膛的烟气热平衡方程、辐射换热方程及炉膛传热计算的零维模型，方程中考虑了上下炉膛间的辐射换热。

In order to optimize the design of hot blast stove, a model of heat transfer in chamber of hot blast stove was developed and the software based on the model was established. The effect of the checker thermal characteristics such as thermal conductivity, heat capacity, density etc on the temperature of blast and checkers,the heat accumulation and heat release of checkers was determined.

为优化热风炉设计，建立了热风炉蓄热室内传热过程的数学模型，制作了应用程序软件，探讨了不同的格子砖物性参数，如导热系数、比热容和密度等对格子砖温度场分布、气体温度分布以及格子砖蓄热量和放热量的影响。

By Using the 3 D unsteady state heat transfer equation,the heat convection and radiation between the checker and the gas which flows through the checker holes,and the heat conduction among the checker in the chamber of the hot blast stove were studied.

应用三维非稳态热量传输方程，对高炉热风炉在燃烧过程中蓄热室内格子砖与气体之间的对流和辐射传热，以及格子砖内部的导热过程进行了耦合求解得到了在燃烧期内格子砖及燃烧过程中燃烧废气的温度分布情况及其随时间的变化规

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐