The “drag per unit span” (D′) for a flat plate in supersonic flow refers to the aerodynamic force parallel to the direction of the incoming flow, acting on a unit span length of the flat plate. In the context of a flat plate in supersonic flow, drag is generated due to the pressure difference between […]
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The “change in the parameter” in flight mechanics refers to the difference between the initial value and the final value of a certain parameter that characterizes the behavior of an aircraft. This parameter could be an angle, a force, a moment, a velocity, or any other relevant quantity. Δϕ represents the change in the parameter.
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The “lift per unit span” (L′) for a flat plate in supersonic flow refers to the aerodynamic force perpendicular to the direction of the incoming flow, acting on a unit span length of the flat plate. In the context of a flat plate in supersonic flow, lift is generated due to the pressure difference between
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The “resultant force per unit span,” often denoted as R′, refers to the net aerodynamic force acting on a unit span length of a body, such as an airfoil or wing, in aerodynamics and fluid dynamics. This force takes into account both the lift force and the drag force experienced by the body as it
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The “Prandtl-Meyer angle after a deflection,” often denoted as ν2​, refers to the angular deviation of the flow direction after it has been deflected due to interactions with shock waves or other flow disturbances. This concept is widely used in the analysis of compressible fluid dynamics, especially in scenarios involving changes in flow direction. ν2​
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The temperature at downstream in region two, often denoted as T2​, refers to the temperature of the fluid immediately after passing through a compression wave (shock wave). In fluid dynamics, compression waves are characterized by abrupt changes in flow properties, including temperature, pressure, density, and velocity. Temperature in region two behind the compression wave (T2)
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In flight mechanics, the “change in velocity” refers to the difference between an aircraft’s initial velocity and its final velocity. Velocity is a vector quantity that describes both the speed and the direction of an object’s motion. The change in velocity takes into account both the magnitude and direction of the velocity change. Δv represents
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In flight mechanics, eigenvalues associated with the lateral dynamics of an aircraft are values that describe the behavior of the aircraft’s lateral motion in response to perturbations or disturbances. The lateral dynamics pertain to the aircraft’s side-to-side motion, such as rolling and yawing. λ could represent an eigenvalue associated with the lateral dynamics of the
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The pressure in region two behind a compression wave, often denoted as p2​, refers to the pressure of the fluid after it has passed through a compression wave (also known as a shock wave). Compression waves are characterized by a sudden increase in pressure, density, and temperature of the fluid. The pressure p2​ is the
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In flight mechanics, the “radius of gyration” refers to a measure of how the mass of an aircraft is distributed from its axis of rotation. It’s a characteristic parameter used to simplify the analysis of an aircraft’s rotational behavior, particularly in terms of its resistance to changes in orientation or angular motion kB​ is the
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