The moment coefficient about the leading edge (cm,LE) is a dimensionless parameter used in aerodynamics to describe the aerodynamic moment or torque acting on an airfoil or wing about its leading edge. It provides a normalized measure of the rotational force that causes the airfoil to pitch or rotate around its leading edge due to […]
The angle of attack is the angle formed between the chord line of an airfoil (typically the wing) and the direction of the oncoming airflow. The chord line is an imaginary straight line connecting the leading edge to the trailing edge of the airfoil. the effective angle of attack at the wing (αw), and the
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The moment coefficient about the leading edge (cm,le) is a dimensionless parameter used in aerodynamics to describe the aerodynamic moment or torque acting on an airfoil or wing about its leading edge. It provides a normalized measure of the rotational force that causes the airfoil to pitch or rotate around its leading edge due to
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In flight mechanics, the “angle of attack at the wing” refers to the angle between the chord line of the wing and the relative wind experienced by the wing. This angle is known as the “effective angle of attack” at the wing and is denoted as αw. αw: Effective angle of attack at the wing.
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The moment about the leading edge (M’LE) refers to the torque or twisting effect applied to an object or surface, typically an airfoil or wing, around its leading edge due to aerodynamic forces. In aerodynamics, moments play a crucial role in determining the balance and stability of an aircraft or other objects moving through a
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The relative wind is defined in relation to the aircraft’s flight path. It’s the direction in which the oncoming air flows over the aircraft’s surfaces, particularly the wings and control surfaces. The relative wind is not necessarily the same as the actual wind that’s blowing in the atmosphere, as the aircraft’s own motion contributes to
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Circulation (Γ) around a closed curve in fluid dynamics is a measure of the rotational motion of fluid particles as they flow along the path of the curve. It quantifies the tendency of fluid elements to circulate or rotate around the closed path due to the presence of vortices or flow patterns. Γ3 is the
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The pitching moment coefficient is a dimensionless parameter that represents the aircraft’s tendency to rotate around its lateral (pitch) axis due to changes in angle of attack. It’s defined as the ratio of the pitching moment to the dynamic pressure, reference area, and reference length. Cmcg = (Mcg / (0.5 * ρ * v^2 *
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The local sheet strength (γ) is a term used in fluid dynamics to describe the difference in velocity between adjacent fluid layers within a fluid flow. It represents the velocity gradient or shear between these neighboring layers. The concept of local sheet strength is particularly important in situations where the flow is viscous or turbulent.
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In the context of a shock wave, T2 refers to the temperature of a fluid immediately behind the shock wave. When a fluid encounters a shock wave, its properties undergo rapid changes, including alterations in pressure, temperature, density, and velocity. The temperature T2 specifically represents the thermodynamic state of the fluid right after passing through
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