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 ?
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.
Tip Speed Ratio (TSR) related to the number of blades used in the wind turbine.
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.
Inherent to their design, variable speed drive compressors have an optimum tip speed range where they operate most efficiently.
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).
Figure 3(b) shows the abscissa for the tip speed ratio, with longitudinal coordinates for power coefficient and dotted line in the figure as the Betz limit value.
Driven by a high-efficiency 50HP gearmotor, the double ribbon agitator turns at variable speeds up to 28 rpm (max tip speed of approximately 280 fpm).
Urban Green Energy (UGE), the US-based company that installed the turbines inside the structure's metal scaffolding in February, says they are "virtually silent" due to their lower blade tip speed and low number of revolutions per minute.
Larger fan blades mean the tip speed of the blades begin to create shockwaves as they near the speed of sound,.