查询词典 heat flow

An experimental heat-transfer system as well as a data reduction procedure was established in this study on the basis of the fundamental theory of liquid crystal thermography with heating at the solid surface. The system was tested by using both the steady-state and the transient methods with single-step heating at the surface. Two problems considered in the test were the flow over a flat plat with an unheated starting length and a uniformly heated cylinder in the cross flow.

本研究基於对固体表面加热之液晶热像法的基本，建一套热传实验系统与据约化程序，并采用稳态实验方法与对固体表面单步级加热之暂态实验方法，以具有前端未加热长的平板，以及绕越长圆柱之横向进实验。

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product's quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block's width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SEN's immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product"s quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block"s width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SENs immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

The total static loads and dynamic loads are summed as 4.692W and 38.4W, respectively. And comparison between the double-wall cooling method and the cooling tube method for the 77 heat shield has been discussed to provide the thermal parameters for flow process simulation. The critical thermal parameters of the main components of the QWR cooling system were determined for parallel arranged QWR cryostats. The mass flow and time for cool-down of the QWR to 4.2K was also estimated.

本文在详细描述恒温柜冷却系统的基础上，详细计算了4.2K冷质量与77K冷屏的辐射漏热，同时，还对恒温柜内部支撑系统计算了变物性下的导热漏热，得出了恒温柜系统的静态和动态热负荷分别为4.692W和38.4W，并分析比较了液氮冷屏采用夹层冷却方式与铜管缠绕冷却方式的优缺点，为流程模拟的参数确定提供了依据。

In this paper, preliminary FDS fire chamber to simulate the flue gas generated through the corridor adjacent to the room near the migration laws, an analysis of indoor air flow field and the movement of smoke layer, and through the simulation of fire scenes, in a simple form of visual dynamic display of the entire process of fire, in the simulation process to obtain more accurate fire-related parameters such as temperature distribution, gas flow and heat radiation, and analysis of simulation results through the fire chamber of the flue gas migration characteristics, results showed that the chamber in the absence of fire smoke control measures, the process of the spread of smoke filled the first chamber is at the top, with the passage of time, the proliferation of slowly downward until the entire chamber is full, and then through the corridor smoke quickly spread to the nearby chamber.

本文运用FDS初步模拟了腔室火灾产生的烟气通过毗邻的走廊向附近房间迁移的规律，分析了室内空气流场和烟气层运动状况，并通过对火灾场景的模拟，以简单直观的形式动态显示出火灾发生的全过程，在模拟过程中获得较准确的火灾相关参数，如温度场分布，烟气流动及热辐射等，并通过模拟结果分析腔室火灾的烟气迁移特性，结果表明着火腔室在无防排烟措施的情况下，烟气扩散的过程是首先充满腔室顶部，随着时间的推移，慢慢向下扩散，直至将整个腔室充满，然后烟气通过走廊快速向附近腔室蔓延。

On the basis of the masteries for the aluminum oxide ore pulp drying and calcination, a mathematical model was developed for simulating the process of heat transfer and the calcination of two-phase flow in a new type furnace designed by Zhongzhou Branch Company, China Aluminium Corporation Limited. The fields of velocity, temperature and pressure of the two-phase flow and the reaction time were gained by optimizing calculation under the condition of different operational parameters and geometric parameters. The effect of vent position velocity and atomization particle diameter on the drying and calcination technology of aluminum oxide ore pulp was discussed.

在了解氧化铝矿浆干燥、烧成工艺及设备的基础上，针对中国铝业股份有限公司中州分公司开发的一种新的氧化铝矿浆干燥和烧成炉，建立了矿浆干燥、烧成炉内气固两相流的流动传热以及烧成过程的数学模型，就干燥、烧成炉运行参数及各几何参数进行优化计算，得出了炉内气固两相流动的速度场、温度场、压力场以及颗粒干燥和烧成反应时间，并分析讨论了喷口位置、喷口速度、颗粒雾化粒径等参数对氧化铝矿浆干燥、烧成工艺的影响。

Line capacities, correct line sizes, flow distribution in loops, required pump and compressor sizes, heat-transfer effects, Joule-Thomson effects, in-line flow patterns, vapor and liquid velocities, and preferential phase splitting at tees are all accurately determined.

管线能力、正确的管线尺寸、环路中的流体分布、要求的泵和压缩机规格、传热效率、Joule-Thomson 效率、管线内部流动方式、气体和液体速度、在三通阀处的预先相分离都可以准确地确定。

This feature of the spiral-flow has significant effects on the heat transfer enhancement and flow resistance.

这种旋转流动特性对内冷通道的强化传热和流阻特性具有很强的影响，与光滑通道相比，通道平均努塞尔数得到了明显的提高，但同时流动阻力也显著增加。

This dialog also allows you to specify advanced physical features you want to take into account: heat transfer in solids, high Mach number gas flow, gravitational effects, time settings, laminar only flow, surface-to-surface radiation.

这个对话也允许你规定你想要考虑的其他先进的物理的特性：在固体中的热转移，高马赫数字气体流动，重力l产生，时间设置，表面对表面的辐射等。

Flow characteristics of flow field in the header of platefin heat exchanger were investigated by means of particle image velocimetry and a series of velocity vector and streamline graphs of different crosssections before and after the header improvement were achieved.

利用Particle Image Velocimetry粒子图像测速仪对板翅式换热器入口结构改进前后的流场进行了实验测试，获得了入口结构内部不同剖面处的流场速度矢量和流线分布图。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。