流体力学(英文).ppt

1、2020/7/18,1,Fluid Mechanics,2020/7/18,2,Preface,Contents,Teaching Contents In Classroom Experimental Projects In Teaching Lab,Total hours: 54 Classroom teaching hours: 48 Practice hours: 6,2020/7/18,3,Teaching Contents (1),Part A (Total hours: 36),A1 Introduction (4 hours) A2 Fluid statics (6 hours

2、) A3 Fluid kinematics (6 hours) A4 Fluid dynamics ( 6 hours) A5 Laminar flow, turbulent flow and energy loss (8 hours) A6 Pipe flow and calculation of pipeline (4 hours) A7 Similarity theory and dimensional analysis (2 hours),Fundamental,2020/7/18,4,Part B (Total hours: 8),B1 Stream functions and po

3、tential functions, frictionless irrotational flow (4 hours ) B2 Boundary layer theory and flow past body (4 hours),Part C (Total hours: 4),C1 Resaerch progress in Fluid Mechancis (1 hour) C2 Modern flow measurement technologies (1 hour) C3 Introduction to numerical simulation of turbulence flow and

4、commercial softwares of CFD (2 hours),Teaching Contents (2),Extended contents,Fundamental,2020/7/18,5,Part A and Part B are the foundation of Fluid Mechanics, Part C is the extended contents and refer to some practical problems. This course also pays much attention to the prevalence of modern fluid

5、mechanics, for example, the introduction to the theory of turbulence boundary layer and the sketch of computational fluid dynamics (CFD) will help your further applications after your graduation.,Teaching Contents (3),2020/7/18,6,Experimental Projects (1),In-class (Required) (Total hours: 6),E1 Hydr

6、ostatics (1 hour) E2 Velocity measurement with Pitot tube (1 hour) E3 Flow measurement with Venturi tube (1 hour) E4 Verification of Bernoulli equation (1 hour) E5 Reynolds experiment (1 hour) E6 Measurement of friction loss coefficient for circular pipe flow (1 hour),2020/7/18,7,Experimental Projec

7、ts (2),After-class (Total hours: 6-8),E1 Liquid viscosity measurement (1 hour) (Optional) E2 Demonstrating experiment about flow pattern and streamline (1 hour) (Required) E3 Measurement of local loss coefficient for circular pipe flow (1 hour) (Required) E4 Demonstrating experiment about Siphon pri

8、nciple (1 hour) (Required) E5 Demonstrating experiment about flow around airfoil and cylinder (1 hour) (Required) E6 Demonstrating experiment about vortex formation (1 hour) (Required) E7 Self-designing experiments (1 hour) (Optional),2020/7/18,8,Textbook,Frank M. White. Fluid Mechanics. McGraw Hill

9、 Higher Education, 7th Revised edition, 2010.2,2020/7/18,9,References,E. John Finnemore, Joseph B. Franzini. Fluid Mechanics with Engineering Applications. McGraw-Hill Higher Education, 10th Revised edition, 2001.10,2020/7/18,10,References,Jin Xiaohong, Li Yuanhui. Fluid Mechanics (bilingual Teachin

10、g). Beijing: China Power Press, 2011.9,2020/7/18,11,5% attendance 10% homework 10% required experiments 5% optional experiments 70% final exam,Grades,2020/7/18,12,Chapter 1 Introduction,When you think about it, almost everything on this planet either is a fluid or moves within or near a fluid. Frank

11、 M. White,Preliminary Remarks,Fluid can be found almost everywhere on the earth !,2020/7/18,13,Overview of Fluid Mechanics,The concept of fluid The primary physical property of fluid Study objects of Fluid Mechanics The nature of the subject of Fluid Mechanics Tasks of Fluid Mechanics Study approach

12、es of Fluid Mechanics Importance (position) of the course History of Fluid Mechanics,The following aspects will be discussed:,2020/7/18,14,The concept of a fluid,A solid can resist a shear stress by a static deformation. A fluid can not resist a shear stress by a static deformation. Any shear stress

13、 applied to a fluid, no matter how small, will result in motion of that fluid. The fluid moves and deforms continuously as long as the shear is applied.,Introduction,2020/7/18,15,Fluidity ？,Fluid,Solid,yes,no,The primary physical property of fluid,2020/7/18,16,Fluid mechanics is an important branch

14、of modern mechanics，Its a science that studies fluids balance (Fluid statics), mechanical movement laws (Fluid Kinematics) and the interaction between fluid and the boundaries (Fluid Dynamics), which may be either solid surfaces or interfaces with other fluids. It mainly ascertains the distribution

15、of speed and pressure, energy loss and the interaction force and the moment between fluid and boundary.,Introduction,Study Objects of Fluid Mechanics (1),2020/7/18,17,Water and air are researched mostly in fluid mechanics. Besides these, fluid also includes vapor as work medium in turbine, lube oil,

16、 water which mixing with mud and sand, blood, melting metal and the gas with complicated components coming from burning, plasmas under high temperature condition, etc.,Study Objects of Fluid Mechanics (2),Stationary boundaries：riverbed, pipe wall, building, etc； Moving boundaries：aircraft, ship, run

17、ner, etc.,Types of boundary,2020/7/18,18,Mechanics,Research object The carrier of mechanical problems,Fluid Mechanics,Fluid,Liquid Water,Mechanics,Three conservation laws,Hydraulics,Introduction,Liquid is the main research object; Mainly focus on engineering applications; Suitable for students in Hy

18、draulic Eng., Civil Eng.,The nature of the subject of Fluid Mechanics,Conservation of mass, momentum and energy,2020/7/18,19,Fluid mechanics is not only an age-old subject, but also a new fashion subject which can be researched on quite widely fields. There are many questions about fluid mechanics i

19、n these departments, such as in aviation, spaceflight, navigation, astronomical weather, physical geography, water conservancy and hydropower, heat energy refrigeration, building construction and environmental protection, petroleum and chemical engineering, transporting air and liquid, combustion an

20、d explosion, metallurgy and mining, biology and sea, war industry and nuclear energy, machine building, mechanical engineering, etc.,Tasks of Fluid Mechanics,Introduction,Engineering fields and disciplines relative to Fluid Mechanics,2020/7/18,20,Vortex created by the passage of an aircraft wing, re

21、vealed by coloured smoke,Turbulence in the tip vortex from an airplane wing,Engineering fields relative to Fluid Mechanics,2020/7/18,21,aviation,spaceflight,navigation,Rocket launching,fountain,2020/7/18,22,Axial-flow fan Maliaut the balance to measure the resistance of moving object; Pascal the bas

22、ic relation formula of hydrostatics.,History of Fluid Mechanics (2),The second period：from the 20th B.C to late stage of the 17th century A.D.,2020/7/18,52,Introduction,Newton Newtons law of viscosity; Bernoulli Bernoullis law of steady incompressible fluid; Euler describing a method of fluid motion and equations of inviscid fluid motion; Lagrange stream function; ReynoldsReynolds experiment and R