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Chapter 21

Flow in Pipes

管道流 I 的一般特性
管道流 I 的一般特性
Pipe flow describes fluid movement through enclosed, fully-filled conduits, typically cylindrical pipes like water pipes or hydraulic hoses, engineered to ...
管道流 II 的一般特性
管道流 II 的一般特性
As fluid enters a pipe, it first flows through an entrance region where the velocity profile adjusts, forming a boundary layer along the walls. This ...
层流
层流
Laminar flow refers to the smooth, orderly motion of fluid particles in which each particle follows parallel paths with minimal mixing between layers. The ...
层流:问题解决
层流:问题解决
Consider air flowing through the pipe at 300 Kelvin at standard atmospheric pressure, with a mass flowrate of 0.0163 kilograms per second. If the flow is ...
湍流
湍流
Turbulent flow is a fluid movement marked by chaotic shifts in pressure and velocity. Unlike laminar flow, turbulent flow displays complex, irregular ...
湍流:问题解决
湍流:问题解决
Consider a liquid that needs to be carbonated. Both the liquid and the carbon dioxide gas are cooled. The temperature is selected as 20 degrees Celsius to ...
管道中的重大损失
管道中的重大损失
Consider  a fluid flowing through a pipe; it encounters frictional resistance, causing energy losses known as major losses, resulting in a pressure ...
管道中的局部损失
管道中的局部损失
Minor losses in pipe systems arise from components like valves, bends, and fittings that disrupt fluid flow, causing energy dissipation through turbulence ...
单管系统
单管系统
In pipe flow problems, scenarios are grouped by known information and desired calculation and are typically classified as Type I, II, or III. In a Type I ...
多管道系统
多管道系统
Multiple pipe systems consist of interconnected pipes that regulate fluid flow across complex networks. They can be arranged in series, parallel, loop, or ...
管道流量测量
管道流量测量
Flow measurement devices—such as orifice, nozzle, and Venturimeters—operate by narrowing the flow area. This increases fluid velocity and ...
管道流量测量:问题解决
管道流量测量:问题解决
Consider a spray tank system designed to evenly apply pest-control liquid to plants. The system includes a pressurized tank at 150 kPa filled with ...
设计示例:设计住宅卫浴系统
设计示例:设计住宅卫浴系统
The residential plumbing system is designed by assessing the building's water demand and flow rate needs based on occupancy and fixture requirements. ...
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