The “velocity of the upper plate” refers to the speed at which the upper plate is moving relative to the stationary plate or relative to the fluid itself. ue velocity at the edge Me is the Mach number at the edge ae is the speed of sound at the edge
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Heat transfer per unit area is a measure of the amount of heat energy that is transferred through a surface per unit area in a given time. It quantifies the rate at which heat is conducted, convected, or radiated across a specific area. 𝜌e is the density at the edge ue is the velocity at
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In flight mechanics, the “boundary layer” refers to a thin layer of air adjacent to the surface of an aircraft’s wings or other aerodynamic surfaces. This layer of air experiences significant velocity changes and develops due to the interaction of the airflow with the solid surface. BFL = 0.2387 * (W/S) * (T0 / ρ)
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The adiabatic wall temperature (Taw) refers to the hypothetical temperature of a solid surface or wall that is assumed to be perfectly insulated or impermeable to heat transfer. This means that no heat is exchanged between the wall and the surrounding fluid. Taw is the adiabatic wall temperature haw is the adiabatic wall enthalpy cp
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It is a state function used to describe the total energy content of a system, including both its internal energy and the energy associated with pressure and volume changes. Specific heat at constant pressure (cp) The temperature at the wall (Tw) Wall enthalpy (hw)
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The decrement in mass flow due to the presence of boundary layer is known as the missing mass flow. 𝜌e is the density of edge ue is the velocity of edge 𝛿* is the height
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In flight mechanics, the planform area of the exposed wing refers to the total projected area of the wing when viewed from above. It represents the area of the wing that is exposed to the airflow and contributes to generating lift and inducing drag during flight. Planform area of the exposed wing (Se) =Semi span
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The total decrement in momentum flow across the vertical line is known to be the missing momentum flow. 𝜌e is the density of the edge ue is the velocity of the edge θ is the height
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In flight mechanics, the reference area (S) is a fundamental parameter used to describe the aerodynamic characteristics of an aircraft’s wings. It is a crucial quantity in various aerodynamic equations and performance calculations. The reference area is typically associated with the wings, but it can also be used for other components, such as the horizontal
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In flight mechanics, BSFC stands for Brake Specific Fuel Consumption. It is a measure of an engine’s fuel efficiency and represents the amount of fuel consumed per unit of power output (typically per unit of brake horsepower) produced by the engine. BSFC is commonly used to evaluate and compare the fuel efficiency of internal combustion
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