The Normal Mach number behind a shock wave, often denoted as Mn,2​, represents the Mach number of the flow behind the shock wave, considering the normal component of velocity relative to the shock’s front. It is used to describe the change in velocity due to a shock wave’s effect on the flow. Normal Mach number […]
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The pressure at the stagnation point, often denoted as ps​, refers to the pressure that a fluid experiences when it is brought to a complete stop in a flow field, typically due to an obstacle or surface. The stagnation point is where the fluid velocity is zero, and it’s also known as the “stagnation point
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In a Pitot tube, the flow velocity (u1​) refers to the velocity of the fluid in a subsonic flow field at a specific point where the Pitot tube is positioned. The Pitot tube is a device used to measure the total pressure of a flowing fluid. In subsonic flow, the velocity of the fluid is
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The Mach number ahead of a wave in a subsonic compressible flow, often denoted as M1​, refers to the ratio of the velocity of the flow ahead of the wave to the local speed of sound in that region. It characterizes how fast the flow is moving relative to the speed of sound, and it’s
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The Mach number behind an oblique shock wave, often denoted as M2​, represents the ratio of the velocity of the flow behind the shock to the local speed of sound in that region. It’s a crucial parameter in the analysis of compressible fluid dynamics and shock waves, particularly in situations where the flow undergoes abrupt
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The local speed of sound downstream in region 2 for one-dimensional compressible flow, often denoted as a2​, refers to the speed at which small disturbances or pressure waves propagate through the fluid in a specific region of the flow downstream from a certain point. This parameter is crucial in the analysis of compressible fluid dynamics
In one-dimensional compressible flow, the local speed of sound downstream, often denoted as a1​, refers to the speed at which small disturbances or pressure waves propagate through the fluid in a particular region of the flow. It’s a critical parameter in the analysis of compressible fluid dynamics and is closely related to the local thermodynamic
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The static temperature is defined based on the concept of conservation of total energy in a fluid flow. For an adiabatic and reversible process, the static temperature is the temperature a parcel of gas would have if it were brought to rest isentropically (without any heat exchange with the surroundings) and isentropically compressed or expanded
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Total temperature is a measure of the total energy of a fluid, including both the internal energy and the kinetic energy due to velocity. It takes into account both the temperature due to molecular motion and the temperature rise associated with the kinetic energy of the fluid particles. NOTE: The total temperature is constant across
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Length of the wedge (l) refers to the physical dimension that measures the size of a wedge-shaped object. In geometry and engineering, a wedge is a three-dimensional shape that resembles a triangular prism with one of its ends narrower than the other. The length of the wedge typically refers to the dimension along the longest
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