# tip speed

## tip speed

The speed of a rotating airfoil, measured at its tip. It is generally subsonic except for the blade tips and the tips of the centrifugal compressors, which may be supersonic.
References in periodicals archive ?
Measured mass flow ([??]), inlet pressure ([P.sub.in]), inlet temperature ([T.sub.in]), outlet pressure ([P.sub.out]), outlet temperature ([T.sub.out]), and shaft speed ([N.sub.phys]) or impeller tip speed (U, and impeller diameter [D.sub.2]) are used with ratio of specific heats ([gamma]) for air to calculate corrected speed ([N.sub.C]), corrected air flow ([[??].sub.corr]), pressure ratio ([[pi].sub.C]), and isentropic efficiency ([[eta].sub.C]), using Equations 1 through 4.
Based on the ratio of decibels to pounds of thrust, the GEnx is the quietest engine GE produces due to the large, more efficient fan blades that operate at slower tip speed, resulting in about 40 percent lower noise levels.
Inherent to their design, variable speed drive compressors have an optimum tip speed range where they operate most efficiently.
where [rho] is air density (kg/[m.sup.3]), R represents blade radius (m), v is wind speed (m/s), and [C.sub.p] is power conversion efficiency which is nonlinear function of tip speed ratio [lambda] and pitch angle [beta].
Tip Speed Ratio (TSR) related to the number of blades used in the wind turbine.
The designed rotor tip speed of the XH-59A pure helicopter configuration is 650 ft/sec.
The rated rotational speed is v = 10 m/s; the tip speed of blade is v = 85 m/s.
Available in diameters of 48 to 72 inches (in.), and weighing a minimum of 30 pounds (lb), it has a maximum tip speed of 22,000 feet per minute (fpm), as well as other advantages over steel, aluminum or plastic equivalents.
They show that the usage of different fluids significantly influences the drag force acting on the cantilever and confirm that the drag force dependence on tip speed is essentially linear in nature.
Based on earlier findings, it was determined that the energy cost of the two-bladed wind turbine was somewhat lower than that of the three-bladed with a lower tip speed ratio.
The fan's tip speed reportedly is 2025% faster than the current industry standard of roughly 18,000 fpm, said Neal Shawaluk, lead sales engineer, off-highway.
The wind turbine is characterized by dimensional curves of the power coefficient (Cp) as a function of both the tip speed ratio (X) and the blade pitch angle(B).

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