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Bernoulli's Principle: Applications01:17

Bernoulli's Principle: Applications

6.2K
There are many devices and situations in which fluid flows at a constant height and so can be analyzed using Bernoulli's principle. These devices include, but are not limited to, entrainment devices and fluid flow measuring devices.
Entrainment devices use a high fluid speed to create low pressures and, thus, entrain one fluid into another. Some examples of these devices are given below:
6.2K
ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
4.6K
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

988
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...
988
Typical Model Studies01:30

Typical Model Studies

603
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.
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Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

1.1K
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,...
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Free Jet01:14

Free Jet

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Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:
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関連する実験動画

Updated: Jan 8, 2026

Preparation of Free-Surface Hyperbolic Water Vortices
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渦巻ポンプの渦巻室形状改良による性能向上

Kun Lan1,2, Yaguang Heng3,4,5,6, Qifeng Jiang1,2

  • 1School of Energy and Power Engineering, Xihua University, Chengdu, 610039, China.

Scientific reports
|December 21, 2025
PubMed
まとめ
この要約は機械生成です。

本研究では、渦巻室形状の改良により渦巻ポンプの効率を最適化した。台形渦巻室は流れのパターンを改善し、揚程を3.6m、効率を3.2%向上させ、消費電力を削減した。

キーワード:
エントロピー生成解析内部流れ解析性能最適化渦巻室最適化渦巻ポンプ

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

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

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関連する実験動画

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A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
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Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
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科学分野:

  • 流体力学;機械工学

背景:

  • 渦巻ポンプはコンパクトで高揚程という利点があるが、効率が低いという欠点がある。;渦巻ポンプ性能の最適化は、より広範な工学用途にとって重要である。

研究 の 目的:

  • 渦巻ポンプの効率向上、揚程増加、消費電力削減を目的とする。;渦巻室形状が内部流れパターンとポンプ性能に与える影響を調査する。

主な方法:

  • 内部流れのダイナミクスを解析するために数値シミュレーションが用いられた。;渦巻室形状の改良、特に台形設計が提案され、シミュレーションされた。;最適化された渦巻ポンプモデルで実験的検証が行われた。

主要な成果:

  • 非理想的な二重渦巻構造が性能に影響を与える重要な要因であることが特定された。;台形渦巻室は内部の流れパターンを大幅に改善した。;実験結果は、揚程が3.6m増加し、効率が3.2%上昇したことを示した。;消費電力は最適化モデルで10〜20W減少した。

結論:

  • 渦巻室形状は渦巻ポンプの性能にとって重要である。;適切に設計された渦巻室の拡散角は、好ましくない渦巻構造を抑制し、エネルギー損失を最小限に抑えることができる。;最適化された渦巻ポンプ設計は、効率の向上と消費電力の削減を提供する。