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相关概念视频

Single Pipe Systems01:24

Single Pipe Systems

488
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
488
Multiple Pipe Systems01:21

Multiple Pipe Systems

1.3K
Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
1.3K
Pipe Flowrate Measurement: Problem Solving01:28

Pipe Flowrate Measurement: Problem Solving

900
A spray tank system is engineered to uniformly distribute a pest-control liquid across plants by using a pressurized mechanism. The tank, pressurized to 150 kPa, holds the pesticide at a height of 0.80 meters. Liquid flows from the tank through a 1.9 meter pipe with a diameter of 0.015 meters, angled at 0.698 radians, ultimately reaching a 0.007 meter nozzle that sprays the pesticide. Accurate calculation of the system's flow rate is crucial to ensure uniform application, and this is achieved...
900
Typical Model Studies01:30

Typical Model Studies

660
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
660
Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

1.3K
In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...
1.3K
Major Losses in Pipes01:28

Major Losses in Pipes

2.1K
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
2.1K

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相关实验视频

Updated: Feb 28, 2026

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

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基于OFDR技术和数值模拟方法的地下污水管道温度研究.

Lei Gao1, Xinyu Wu1, Zhuodi Zheng1

  • 1Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China.

Sensors (Basel, Switzerland)
|February 27, 2026
PubMed
概括

地下污水管道的温度正在缓慢上升,观察到的最大变化为0.55°C. 这项研究为安全的城市基础设施运行提供了对管道热态度的关键见解.

科学领域:

  • 土木工程 土木工程是指土木工程.
  • 环境工程 环境工程
  • 地质技术工程 地质技术工程

背景情况:

  • 地下污水管道是重要的城市基础设施.
  • 管道温度对污水系统的安全运行产生重大影响.

研究的目的:

  • 监测和分析地下污水管道中的温度变化.
  • 为了探索污水管道温度的时空分布.
  • 为未来关于污水管道热管理的研究提供参考.

主要方法:

  • 在南京的污水管道上进行了现场温度监测实验.
  • 使用光学频域反射计 (OFDR) 来获取温度数据.
  • 采用数值模拟方法来研究温度变化.

主要成果:

  • 观察到地下污水管道温度的持续,缓慢的上升趋势.
  • 记录了0.55°C的最大温度变化.
  • 数字模拟结果与实验监测数据保持一致.

结论:

  • 该研究成功地描述了地下污水管道的热行为.
关键词:
实地测试 实地测试 实地测试数字模拟的数字模拟.光学频率域反射计反射计污水管道管道的污水管道.温度的温度的温度的温度的温度.

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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相关实验视频

Last Updated: Feb 28, 2026

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Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
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  • 调查结果证实了温度缓慢上升,并为基础设施安全提供了有价值的数据.
  • 实验监测和数值模拟的综合方法对于管道温度分析是有效的.