普通高等教育“十二五”規(guī)劃教材 Fluid Mechanics流體力學(xué)

內(nèi)容概要

本書為普通高等教育"十二五"規(guī)劃教材。
本書是針對普通高等院校機械類本科專業(yè)"工程流體力學(xué)"課程英漢雙語教學(xué)編寫的，主要內(nèi)容包括流體性質(zhì)、流體靜力學(xué)、流體流動概念和基本方程組、流動阻力及流體力學(xué)的應(yīng)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(zhì)以及課程教學(xué)安排。為方便學(xué)生復(fù)習(xí)，本書還按書中出現(xiàn)的先后順序，給出了主要關(guān)鍵詞和大部分習(xí)題答案.
本書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(yè)教材，也可作為機械類和近機械類專業(yè)留學(xué)生的參考用書。

書籍目錄

前言
致讀者
1FluidProperties
2FluidStatics
3FluidFlowConceptsandBasicEquations
4FluidResistance
5ApplicationsofFluidMechanics
Appendix
Answers
Reference

章節(jié)摘錄

版權(quán)頁：插圖：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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《Fluid Mechanics流體力學(xué)(英語教學(xué)版)》是普通高等教育“十二五”規(guī)劃教材之一。

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