对流传热

Radiation between cell tube and air feed tube and heat transfer by convection and conduction was also included in this model.

在传热模型中，除考虑传导和对流换热外，也考虑了电池和空气进气管之间的辐射换热。

Radiation between cell tube and air feed tube and heat transfer by convection and conduction were also included in this model.

在传热模型中，除了考虑传导和对流换热外，也考虑了电池和空气进气管之间的辐射换热。

The heat transfer coefficients and pressure drop data for different fin pitch F p and fin height F h were reported in terms of Colburn j -factor and Fanning friction factor f , as function of Re Lp .

在风洞试验台上对20种不同结构参数的扁管百叶窗翅片进行了传热和流动阻力性能试验，分析比较了翅片间距和翅片高度对其表面对流换热系数和空气阻力性能的影响。

It builds the whole liquid-cooling system mainly by the design of the liquid-cooling decalescence boxes(improve its bottom material from aluminium alloy to pure copper, enlarge its volume, better cooling effects, and strengthen pressurization), by the operations of cooling effect about the heat exchanger worked by its temperature adjustability of the ribs(diffuse the heat fleetly owing to the excellent diathermancy of the material of the ribs ,make effective diathermancy owing to ribs outside areas, and drive the heat of the ribs away by the fans), and by the water pump made up of the piezoelectric ceramic with the excellent performance-no electromagnetism interference, little cubage, little noise, light exterior, light weight, low consume, high flux, replacing the mechanical pump.

在液冷散热器的研究中，主要通过对液冷吸热盒设计不断地改进(使吸热盒底部的材料从铝合金变为纯铜材料，其整个体积有所变大，但其散热效果明显变好，且密封性得到了极大地加强)，综合地运用换热器中肋片的壁面温度调节作用产生的散热效果(肋片材料优良的导热性，快速地扩散了热量：肋片较大的与流体接触的表面积，使传热更加充分，对流热阻大大减小；再利用风扇对肋片上的热量进行吹散)，利用性能优良的压电陶瓷泵(该泵机电性能稳定，具有无电磁干扰、体积小、噪音小、外型轻薄、重量轻、低能耗。、高扬程等优点。)代替机械泵作为驱动源，搭建了整个散热系统。

With the help of finding the effects of the heat transfer process of building envelope on the indoor environment, solving the indoor flow field and temperature field, the heat convection coefficient of wall surface is obtained at last.

通过发掘建筑维护结构的传热过程对室内环境的作用与影响，求解室内速度场、温度场，从而得到墙体表面对流换热系数。

Supported by the National Natural Science Foundation of China(Study on Heat Transfer Characteristics of Downhole Coaxial Heat Exchanger in Convection Geothermal Reservoir )and Tianjin Development and Plan Program of Science and technology(Study of Ecologic Architectural Energy System), the thermal performance exploiting earth energy for heating and cooling is studied in this paper,and its main purpose is to offer reference for increasing the percent of renewable energy in Ecologic Architectural Energy.

本文在国家自然科学基金（井下换热器周围对流型地温地层内的传热特征研究）和天津市科技发展计划项目的资助下，重点研究了地表热能高效利用中的传热与热力性能问题，为可再生能源在生态能源建筑中发挥更大的作用提供依据。

On basis of experimental investigation, this article analyzed flow and heat transfer characteristics between parallel plates packed with small particles.

在试验研究的基础上，分析了平行平板间填充小颗粒填料后的流动和传热特性，表明利用小颗粒填充强化板间对流换热，可以获得显著的传热强化效果，同时流动阻力的增加远小于微颗粒时，通过优化选择能够得到较好的强化收益。

Through this material one could setup an overall impression of the study content and the study method.In order to investigate the basic heat transfer characteristics of regeneratively cooled scramjet, in the second chapter, one dimensional heat transfer model of regeneratively cooled scramjet was developed. In this model, N-R correlations were used to describe hot gas-side and coolant-side convection heat transfer. Simple model of gas properties was also used.

为了初步了解超燃冲压发动机再生冷却传热的基本特征，第二章建立了超燃冲压发动机再生冷却的一维传热数理模型，采用了准则关系式描述燃气侧和冷却剂侧的对流换热，采用了简化的燃气物性模型，并对衬层材料、衬层厚度和冷却剂流量进行了参数研究。

It plays an important part in saving energy and decreasing the volume and weight of heat exchanger.

本文所研究的被称为强化传热革命的三维内肋管就是应用于各种换热器中单相强迫对流换热的新型强化传热管。

On the basis of structural features and heat transfer characteristics of a spiral-grooved tube heat exchanger,a three-dimensional geometric model was established for the flow and heat transfer in a heat exchanger with water serving as its working medium.

根据螺旋槽管换热器结构特点及传热特性，建立了以水为工质的换热器流动与传热的三维几何模型。运用有限元分析软件ANSYS模拟出换热器在换热过程中速度场与温度场的状况，分别得到了螺旋槽管内壁与外壁的对流换热系数。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。