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関連する概念動画

Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
Determination of Pi Terms01:15

Determination of Pi Terms

The Buckingham Pi theorem is a valuable method in dimensional analysis, reducing complex relationships between variables into dimensionless terms. Relevant variables in analyzing the lift force on an airplane wing include lift force, air density, wing area, aircraft velocity, and air viscosity. Expressing each variable in terms of fundamental dimensions — mass, length, and time — provides a consistent foundation for constructing these dimensionless terms.
The theorem indicates that the number...
General External Flow Characteristics01:26

General External Flow Characteristics

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...
Drag01:23

Drag

Drag is a resistive force opposing an object’s motion through a fluid, resulting from surface pressure and shear forces. It comprises two components: a perpendicular one from pressure and a tangential one from shear stress. Accurate drag calculations use pressure and wall shear stress distributions, often determined through Computational Fluid Dynamics (CFD) or wind tunnel testing. The drag coefficient, a dimensionless measure, depends on factors like shape, Reynolds number, Mach number, Froude...
Lift01:23

Lift

Lift is a fundamental aerodynamic force that acts perpendicular to the direction of airflow. It plays a central role in achieving and sustaining flight and in stabilizing various vehicles. Lift primarily originates from pressure differences created across surfaces, such as an airfoil. A lower pressure region forms above the wing, while a higher pressure region forms below it, generating an upward force. This differential results from the shape and orientation of the airfoil, enabling the wing...
Problem Solving: Volume01:13

Problem Solving: Volume

The volume of a fuel tank mounted on the wing of a jet aircraft can be modeled using the concept of solids of revolution. In this case, the tank is formed by rotating a two-dimensional region, defined by a mathematical function, about the x-axis. The region extends along the axis from zero to two meters, and the resulting three-dimensional shape is symmetric about the axis of rotation. Because the boundary curve lies directly against the axis, the disk method is an appropriate technique for...

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関連する実験動画

Updated: Jul 8, 2026

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
14:57

Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

Published on: January 30, 2019

航空機設計のための計算空力学.

A Jameson

    Science (New York, N.Y.)
    |July 28, 1989
    PubMed
    まとめ
    この要約は機械生成です。

    この記事では,航空機のフローを予測するための数学的方法について,数学モデル,ショックキャプチャリングアルゴリズム,複雑な幾何学に焦点を当てて説明します. これらの方法は,航空機設計における空気力学性能の最適化に不可欠です.

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    Last Updated: Jul 8, 2026

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
    14:57

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

    Published on: January 30, 2019

    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

    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

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    科学分野:

    • コンピューティング流体力学 (CFD)
    • 航空宇宙工学は,航空宇宙工学である.

    背景:

    • 複雑な流体ダイナミクスをシミュレートするには,数学的方法が不可欠です.
    • 航空機の上空の気流を予測することは,エアロダイナミックな設計と性能にとって非常に重要です.

    研究 の 目的:

    • 航空機のフロー予測のための数学的方法の開発における主要な課題を概説する.
    • 航空機の設計プロセスにおけるこれらの方法の適用について議論する.

    主な方法:

    • 流体の流れに適した数学モデルの選択.
    • ショックキャプチャリングアルゴリズムの開発と実装.
    • シミュレーションで複雑な幾何学的な構成を扱う.
    • 空力学的な形状の最適化のための計算方法を使用する.

    主要な成果:

    • 航空機の数値フロー予測における主要な問題を特定しました.
    • ショックキャプチャリングアルゴリズムと幾何学的複雑性処理の重要性を強調した.
    • 空力学性能の最適化における数学的方法の役割を実証した.

    結論:

    • 効果的な数学的方法は,航空機の設計を進めるために不可欠です.
    • 数学的モデリングとアルゴリズム設計における課題に取り組むことが鍵となる.
    • 計算式流体力学 (CFD) は,空気力学性能の最適化において重要な役割を果たします.