The radial velocity for a three-dimensional point source represents the velocity of the fluid flow at any given distance (r) from the point source. The point source is a theoretical concept used in potential flow theory to model fluid flow emanating from a single point or converging towards it. The radial velocity describes how the […]
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In flight mechanics, the term “headwind” refers to the airflow that opposes the forward motion of an aircraft. It occurs when the wind is blowing directly opposite to the aircraft’s direction of travel. Headwinds are an essential factor to consider during flight operations as they can significantly impact the performance of the aircraft. Va –
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In flight mechanics, the term “tailwind” refers to the airflow that aids the forward motion of an aircraft. It occurs when the wind is blowing in the same direction as the aircraft’s travel. Tailwinds are an important factor to consider during flight operations as they can significantly affect the performance of the aircraft. Tail wind
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Specific internal energy (e) is a fundamental thermodynamic property of a substance that represents the energy contained within a unit mass of the substance. It is one of the intensive properties used to describe the state of a material in thermodynamics. e is the specific internal energy (in J/kg). cv is the specific heat at
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In flight mechanics, “power required at the end of flight” refers to the amount of power that the aircraft’s engines or propulsion system must generate to sustain level flight at the end of the flight mission. It is an important parameter that pilots and engineers consider during flight planning and performance calculations. Power required at
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In aerodynamics, the Circulation at the origin (Γo) is a fundamental parameter used to describe the flow field around an elliptical wing. It quantifies the strength of the circulation around the wing and is a crucial concept in potential flow theory. The Circulation at the origin (Γo) is associated with the lift generated by the
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The heat transfer coefficient (CH) is a measure of how effectively heat is transferred between a solid surface and a fluid (liquid or gas) flowing over or around it. It is a critical parameter in heat transfer analysis and plays a crucial role in various engineering applications, such as designing heat exchangers, cooling systems, and
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In flight mechanics, the term “instantaneous value” refers to a measurement or characteristic of an aircraft or its motion at a specific point in time. It represents the value of a parameter or variable at an exact moment during the flight, as opposed to an average or cumulative value over a period. Instantaneous value= U-bar+u(t)
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In flight mechanics, the speed of sound refers to the velocity at which sound waves propagate through a medium, such as air. It is a critical parameter in aviation because it determines the aircraft’s ability to generate and propagate shock waves and affects various aspects of aerodynamics and aircraft performance. a=√(γ*8.31*t) γ (gamma): In this
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In flight mechanics, the “effective aspect ratio” refers to a modified or effective value of the wing’s aspect ratio that takes into account the influence of non-planar lifting surfaces, such as winglets or wingtip devices. Ae=be^2/s Ae: Ae represents the efficiency factor of the aircraft wing. It is a dimensionless parameter that quantifies the effectiveness
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