西安建筑科技大学：《材料工程基础》课程教学资源（PPT课件）第三章 传热学基础——习题

Heat Transfer Su Yongkang School of Mechanical Engineering Internal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, basic concepts, energy balance

Heat Transfer Su Yongkang School of Mechanical EngineeringInternal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, boundary layer growth, entry effects Where we’re going:

Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Flat Plate Where we’ve been …… General overview of the convection transfer equations. Developed the key non-dimensional parameters used to characterize the boundary layer flow and convective heat and mass transfer

Heat Transfer Su Yongkang School of Mechanical Engineering CH6 – INTRODUCTION Where we’ve been …… Basic Conduction Heat Transfer Finished Fourier’s law:

1.1、已知:如附图所示的两种水平夹层。 求:试分析冷、热表面间热量交换的方式有何不同?如果要 体 通过实验来测定夹层中流体的导热系数.应采用哪一种布置?

本节将针对一维、稳态、常物性、无内热源情况,考察平 板和圆柱内的导热

1求解导热问题的三种基本方法:(1)理论分析法;(2)数值计算法;(3)实验法 2三种方法的基本求解过程 3(1)所谓理论分析方法,就是在理论分析的基础上,直接对微分方程在给定的定解条件下进行积分,这样获得的解称之为分析解,或叫理论解;

Chapter One Introduction Heat: Heat is a kind of energy, Which occurs in the transfer process. (the transferred energy contains the orderly work and disorderly heat) Energy: Concept of energy is used to specify the state of a system in thermodynamics Heat Transfer: kind of application science, is concerned with analysis of the rate of heat transfer taking place in system, or with the research on the heat-transfer reqularity

4-1对流换热概述 4-2层流流动换热的微分方程组 43对流换热过程的相似理论 4-4边界层理论 4-5紊流流动换热