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Fluid Mechanics流體力學(英語教學版)(簡體書)
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Fluid Mechanics流體力學(英語教學版)(簡體書)

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《Fluid Mechanics流體力學(英語教學版)》為普通高等教育“十二五”規劃教材。《Fluid Mechanics流體力學(英語教學版)》是針對普通高等院校機械類本科專業“工程流體力學”課程英漢雙語教學編寫的,主要內容包括流體性質、流體靜力學、流體流動概念和基本方程組、流動阻力及流體力學的應用等。書中附錄給出了常見度量衡和壓強等英制單位制與國際單位制的換算、常見流體性質以及課程教學安排。為方便學生復習,《Fluid Mechanics流體力學(英語教學版)》還按書中出現的先後順序,給出了主要關鍵詞和大部分習題答案。《Fluid Mechanics流體力學(英語教學版)》可作為普通高等院校機械工程及其自動化、機械制造及其自動化、機械電子工程、材料成型及模具和車輛工程等專業教材,也可作為機械類和近機械類專業留學生的參考用書。

名人/編輯推薦

《Fluid Mechanics流體力學(英語教學版)》是普通高等教育“十二五”規劃教材之一。

目次

前言
1 Fluid Properties
I.I Definition of a Fluid
1.2 Units and Conversion
1.3 Fluid Properties
1.4 Perfect Gas
Annotation 1
Problems 1

2 Fluid Statics
2.1 Static Pressure and Characteristics
2.2 Basic Equation of Fluid Statics
2.3 Units and Scales of Pressure Measurement
2.4 Manometers
2.5 Forces on Plane Areas
Annotation 2
Problems 2

3 Fluid Flow Concepts and Basic Equations
3.1 Flow Characteristics
3.2 The Concepts
3.3 Reynolds Transport Equation
3.4 Continuity Equation
3.5 The Bernoulli Equation
3.6 Flow Losses and Steady Flow Energy Equation in the Differential Form
3.7 Application of the Energy Equation to Steady Fluid-flow Situations
3.8 Applications of the Linear-momentum Equation
Annotation 3
Problems 3

4 Fluid Resistance
4.1 Reynolds Number
4.2 Laminar, Steady Flow between Parallel Plates
4.3 Laminar Flow through Circular Tube
4.4 Boundary-layer and Entrance Region of a Straight Pipe
4.5 Resistance to Turbulent Flow in Circular Tube
4.6 Steady Incompressible Flow through Simple Pipe
Annotation 4
Problems 4

5 Applications of Fluid Mechanics
5.1 Orifices
5.2 Cavitation
5.3 Waterhammer
Annotation 5
Problems 5
Appendix
A1 Conversion (換算)
A2 Properties of Common Fluid (常見流體性質)
A3 Teaching Instruction (教學參考)
Answers
Reference

書摘/試閱

The gradually varied flow is defined as that on the flow section the angle fl between twostreamlines is very small or the radius of curvature R of each streamline is infinity as shown inFigure 3.17. All the flows which do not satisfy the qualifications is called therapidly variedflow (急變流) The flows at section a-a and section b-b in Figure 3.3 are thegradually varied flow. The flow at section 1-1 in Figure 3.3 is rapidly varied flow. The essenceof gradually varied flow is that: 1) the streamlines tend to be in the parallel beelines; 2) theacceleration is very small in the flow and the inertia force could be neglected; 3) the flowsection can be considered a plane surface and for this reason the flow section is commonlytaken as the cross section.
In the flow section n-n of gradually varied flow, an element fluid column with area dA andlength dz is selected as the free body as shown in Figure 3.18. The upper surface of column iscoincident with the streamline ab and the lower surface with the streamline cd.t8 The elevationof the lower surface of column is the coordinate z. The pressure on the lower surface is p andthe pressure on the upper surface is p+dp. The velocity of fluid column is u. There are forcesacting on the column in the n-n direction not only the pressure force, but also the forcesincluding: 1) the weight of element fluid ,ogdAdz; 2) the centrifugal force of element fluid(pgdAdz/g)(u2/R). According to the conditions of gradually varied flow, the curvature radius isinfinite, so the centrifugal force is very small, it could be neglected; 3) the surface forces ofelement fluid including the internal frictional force on the two end surfaces and pressure forceson the circumferential surface of column is orthogonal with the axis n-n, so there are nocomponents of them in the n direction.

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