Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Typical Model Studies01:30

Typical Model Studies

354
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.
354
General External Flow Characteristics01:26

General External Flow Characteristics

118
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
118
Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

113
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
113
Laminar Flow: Problem Solving01:24

Laminar Flow: Problem Solving

159
Laminar flow occurs when a fluid moves smoothly in parallel layers with minimal mixing and turbulence. In fluid mechanics, ensuring laminar flow within a pipe is essential for precise control of flow characteristics, especially in engineering applications. The key factor in determining whether flow remains laminar is the Reynolds number, a dimensionless quantity that depends on the fluid's velocity, density, viscosity, and the pipe's diameter. A Reynolds number of 2100 or lower...
159
Pipe Flowrate Measurement: Problem Solving01:28

Pipe Flowrate Measurement: Problem Solving

529
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...
529
Turbulent Flow01:24

Turbulent Flow

173
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
173

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Recommendations for the management of septic arthritis after ACL reconstruction.

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA·2013
Same author

Poly(ADP-ribose) polymerase 1 promotes oxidative-stress-induced liver cell death via suppressing farnesoid X receptor α.

Molecular and cellular biology·2013
Same author

[Clinical significance of changes in T wave and ST segment amplitudes on electrocardiogram from supine to standing position among children with unexplained chest tightness or pain in resting stage].

Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics·2013
Same author

Biomimetic synthesis of equisetin and (+)-fusarisetin A.

Chemistry (Weinheim an der Bergstrasse, Germany)·2013
Same author

ERG Protein Expression Is of Limited Prognostic Value in Men with Localized Prostate Cancer.

ISRN urology·2013
Same author

Syphilis screening among 27,150 pregnant women in South Chinese rural areas using point-of-care tests.

PloS one·2013

相关实验视频

Updated: Jun 24, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

3.1K

基于新的性能预测算法,基于轮分子的结构优化和流场分析.

Kun Sun1,2, Haishun Deng3,4, Cheng Wang5

  • 1School of Mechatronics Engineering, Anhui University of Science and Technology, Huainan, 232001, Anhui, China. ksun@aust.edu.cn.

Scientific reports
|June 3, 2024
PubMed
概括

一个新的算法通过使用可变表面组合叶片行 (VSCBR) 来提高轮分子 (TMP) 的性能. 这种优化的设计比传统的直刀排 (TSBR) 提高了18.2%的速.

更多相关视频

A Rapid Method for Modeling a Variable Cycle Engine
04:58

A Rapid Method for Modeling a Variable Cycle Engine

Published on: August 13, 2019

7.6K
Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
08:59

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Published on: June 13, 2022

2.6K

相关实验视频

Last Updated: Jun 24, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

3.1K
A Rapid Method for Modeling a Variable Cycle Engine
04:58

A Rapid Method for Modeling a Variable Cycle Engine

Published on: August 13, 2019

7.6K
Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
08:59

Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators

Published on: June 13, 2022

2.6K

科学领域:

  • 机械工程 机械工程
  • 流体动力学 流体动力学
  • 真空技术 真空技术

背景情况:

  • 轮分子 (TMP) 中的传统直刀排 (TSBR) 在高刀片速度比率下显示性能稳定.
  • 预测和优化TMP性能对于高效的真空产生至关重要.

研究的目的:

  • 基于可变表面组合叶片行 (VSCBR) 几何模型开发一种新的分子性能预测算法.
  • 在结构上优化VSCBR设计,以提高送速度和压缩比.
  • 分析优化VSCBR的流场,以了解气体分子的行为.

主要方法:

  • 开发用于结构优化和流场分析的模拟计算程序.
  • 响应表面方法的应用,以优化前四个叶片阶段的结构参数.
  • 对比VSCBR性能与传统的直刀排 (TSBR) 设计.

主要成果:

  • 与TSBR相比,优化的VSCBR设计导致速增加了18.2%.
  • 流场分析表明,优化的VSCBR中超过50%的气体分子接近出口.
  • 该研究证实,设计的叶片有助于气体分子向出口运动.

结论:

  • 拟议的VSCBR几何模型和优化算法有效地提高了TMP的性能.
  • 优化的VSCBR设计在送速度和效率上提供了显著的改进.
  • 这些发现为设计更高效的轮分子,用于先进的真空应用提供了基础.