传热

These dimensionless equations of heat transfer will be suitable for practical applications.

论文中获得的含雾空气传热准则式可被推广应用。

The results indicate that the characters of twisted tubes are better than round tubes, and the heat transfer coefficient and power characters are increased with the diminishment of geometry sizes and the increase of fluid parameters.

实验结果表明，扭曲管比圆管的性能好，螺距和管径越小、水喷淋密度和风速越大，传热系数越高，但流动阻力同时增大，存在合适的螺距、管径、水喷淋密度和风速使蒸发式冷凝器综合性能最佳。

Direction cosine analysis based on winmeil;2. According to the directioncosine formula in hexahedron tubular hea ter,the direction cosine of energy bind in inclined and symmetry tubular heater is stuided.

分析了用蒙特卡罗法计算加热炉辐射传热时能束的发射方向和行程长度，根据六面体加热炉中能束的方向余弦公式，对斜顶对称加热炉中发射能束的方向余弦进行了研究，得到了其修正公式，对斜顶壁面相交坐标进行了修正。

The launching direction and journey length of energy bind in calcula ting the radiation heat transferring in tubular heater by method of Monte-Carlo are analysed. According to the directioncosine formula in hexahedron tubular hea ter,the direction cosine of energy bind in inclined and symmetry tubular heater is stuided.

分析了用蒙特卡罗法计算加热炉辐射传热时能束的发射方向和行程长度，根据六面体加热炉中能束的方向余弦公式，对斜顶对称加热炉中发射能束的方向余弦进行了研究，得到了其修正公式，对斜顶壁面相交坐标进行了修正。

The invention resolves defects of discommodity of heat supply speed adjustment of phase-changing floor energy storage mode, finity of phase-changing material availability, and the invention effectively decreases thermal transmission damage of floor heating downwards.

本发明解决了相变地板蓄能方式供暖速率调节不便、相变材料有效利用率有限等缺点，并有效减小了地板采暖向下的传热损失。

The study on flow and heat transfer in downcomer under loss of coolant accident is important to the safety of reactor pressure vessel.

前 言对失水事故下有安注流动时的反应堆压力容器内流动和传热的研究，一直是反应堆热工水力研究的热点之一。

In heat transfer experiment under ambient temperature and pressure, the profile of heat transfer coefficient, and its relation with injection flow rate and downcomer flow rate are investigated.

通过常温常压下传热实验，获得了反应堆压力容器内对流换热系数的分布，对流换热系数与安注流速和下降环腔流速的关系，含气率对对流换热系数的影响。

Based on the theory of heat transfer, hydrodynamics and the theory of metal solidification, by using numerical analysis technology, database technology and visual technology, this paper provided a simulation and check method for the process design to simulate the fluent field and temperature field of the filling solidification and cooling, and can predict the casting quality according to these fields, thus, by this way, improved the quality of casting draft design.

该课题就是为工艺设计提供模拟和校核手段，以传热理论、流体力学及金属凝固理论等为基础，利用数值分析技术、数据库技术和可视化技术等对铸造过程进行仿真，从而模拟出在铸件充型、凝固和冷却中的流场和温度场，并根据这些物理场对铸件质量进行预报，从而提高铸件工艺设计的质量。

The soret effect and Dufour effect on the convective diffusion of VOCs in indoor surroundings was specially investigated.

并采用数值方法研究了室内环境中同时存在温度梯度、湿度梯度和VOCs浓度梯度时的自然对流传热传质现象，着重分析了考虑交叉扩散效应时热瑞利数和浮力比数等对室内VOCs对流扩散的影响。

Avoiding the partial creation lead cold ebullition of phenomenon.

传热面积；既增加了炉胆的刚度，又有效的减弱了炉胆的膨胀应力

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