传热

It is urgently necessary to investigate the mechanism of microscale heat transfer theoretically.

迫切需要在理论上解决微尺度传热问题。

The average heat transfer coefficient of phosphate acid falling film is linear with Re number primitively, more increased afterwards, minished finally.

随着Re的增大，液膜平均传热系数开始呈线性增大，后来增加更快，最后开始减小。

The convective heat transfer characteristics of honeycomb monoliths were investigated experimentally and the convertion heat transfer coefficient was obtained.

首先，本文通过实验方法研究了蜂窝载体内部的传热特性，得到了流体流过蜂窝载体时的换热系数。

In chapter three the performance and structure of components of oxygen probe were especially investigated. The Cr-Cr〓O〓 powder was overcome by treatments. The reason of occurrence of thermal peaks on the EMF curves was explained. A water glass based cement which high temperature insulation was around 10MΩ within 10 seconds at 1600℃ was developed for the use of oxygen probe. The effects of tip end thickness of ZrO〓 tube and amount of reference electrode on response time and thermal equilibrium in oxygen probe were investigated. The optimum tip end thickness of ZrO〓 tube and amount of reference electrode addition were determined. It is found that the heat transfer in oxygen galvanic cell is the rate limiting-step in the response process. The national oxygen probe WOS Ⅱ type was designed and manufactured. By three batches of industrial tests its specification reached the level of American Celox Ⅱ type oxygen probe.

在第三章中分别从参比电极、高温绝缘水泥、插接件等组元入手，着重分析了其性能和结构，开发出了适合于钢液定氧用的Cr-Cr〓O〓参比电极，解决了Cr-Cr〓O〓参比电极高温产生收缩问题，解释了电动势曲线产生峰值的原因；开发了适合于定氧测头使用的水玻璃基耐火水泥，其高温绝缘电阻在1600℃，10秒以内为10MΩ左右；同时对ZrO〓管头部厚度、参比电极量对响应时间的影响以及定氧测头中的热平衡进行了研究，得出了合适的ZrO〓管头部厚度和参比电极加入量，确定了氧浓差电池中的传热是响应过程的限速步骤；设计制造了国产WOSⅡ型定氧测头，进行了三次现场定氧测试，其技术指标达到了美国Celox型定氧测头的水平。

Experiments were done to contrast the heat tansfer enhancement and pressure loss caused by several single-pare vortex generators such as delta winglets,rectangular winglets,trapeze winglets,bevel-cut half-cylinder VG and bevel-cut half-elliptical column VG,which were installed in a rectangular tunnel respectively.

在雷诺数为4000～38000的紊流范围内对矩形风道内分别布置单排一对直角三角翼、矩形翼、梯形翼、斜截半圆柱体、斜截半椭圆柱体等涡流发生器的强化传热效果和压降特性进行了对比实验。

A comprehensive two-dimension model for the freeze drying of materials in vials is constructed in this paper.

本文对瓶装物料的冻干建立了一个考虑因素较为全面的二维数学模型，该模型考虑了侧面传热、结合水解吸和水蒸气温升对冻干过程的影响。

The steam generator is one of main equipment of nuclear steam supply system of nuclear power plant. Monitoring U tube leakage rate of steam generator is necessary for keeping safe and economic operation of nuclear power plant.

蒸汽发生器是压水堆核电站核蒸汽供应系统的主要设备之一，对蒸汽发生器传热管进行泄漏监测关系到核电站的安全和经济运行。

The real shape of U tube was considered, and heat transfer model of underground vertical buried tube heat exchanger was built with math methods and numerical analysis software. The soil temperature distributions around the buried tube under different working conditions were solved by programming.

考虑U型管的实际形状，借助数学方法和数值分析软件，建立了地下垂直埋管换热器传热模型，并通过编程求解数学模型，得到了系统短期运行不同工况下埋管周围土壤的温度场分布情况。

By applying water heat medium technolog y and finned tube conduction instrument,CO waste heat boiler had rebuilt.

利用水热媒技术，采用翅片管传热件，对CO废热锅炉进行了节能改造，运行证明，改造后锅炉的蒸汽过热能力、热效率明显提高，烟气全部回收，说明此次改造十分成功，具有良好的推广应用价

Its working principle is conducting oil in the heater after heating oil transported to the various thermal equipment, heat transfer through after and then back to the furnace to form a closed circle of the process of compulsory in order to achieve the purpose of heating.

其工作原理是导热油在炉内加温后用油泵输送到各个用热设备，经过传热后再回到炉内，形成封闭的强制循环过程，以达到加热目的。

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。