Download PDF by T. Tolay [NASA SP-367]: Introduction To The Aerodynamics Of Flight

By T. Tolay [NASA SP-367]

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And a smaller size. is needed. - the resistance. velocity under this of the introduction flow at a much cylinder to expect These of the performance at 100 km/hr, But try larger. the aerodynamic Reynolds one of the same for free-stream of the speeds A considerably the need the slow same because However, in the the is large for the streamlined. operating lead values, reason eliminated to be the nondimensional determine about would drag Aerodynamic were shoulders cylinder is much actual wire it has drag is considered.

_- ,el Dependence l of flow on Reynolds number. R - pVf where density V mean of fluid, velocity characteristic of viscosity discussion), the pipe true this was regardless tion between 42 setup, laminar of fluid, length, coefficient For kg/m m/sec m (called simply "viscosity" in the earlier kg/m-sec Reynolds found, as evidenced of his varying laminar 3 by using by the distinct combinations and turbulent water, colored of values flow occurred that of below R = 2100 filament. p, for Reynolds V, This f, or numbers the flow in value p.

Line The traced ple is a transmitting out by that ocean buoy A fluid and the Flow flow may Eulerian and it is followed one particle shown in figure be described approach. in two different From as it moves is called 20(a). Lagrangian through a particle Its the position space pathline. has been with An exammarked at 25 6-hour intervals over a period of several days. The path observed is the particle pathline. In order to obtain a clearer idea of the flow field at a particular instant, a Eulerian approachis adopted.

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Introduction To The Aerodynamics Of Flight by T. Tolay [NASA SP-367]

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