Fluid Mechanics流體力學(英語教學版)(簡體書)
- 系列名:普通高等教育“十二五”規劃教材
- ISBN13:9787512319936
- 出版社:中國電力出版社
- 作者:金曉宏
- 裝訂:平裝
- 出版日:2011/08/01
商品簡介
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目次
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
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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