Turbine blade from a Turbo-Union RB199 jet engine. This is a blade with an outer shroud which prevents gas leaking round the blade tip in which case it wouldn't contribute to the force on the aerofoil. The platform at the base of the aerofoil forms a continuous annulus ring which, together with cooling-air cavity purge flow prevents hot gas leakage onto the turbine discs. The short extension, or shank, between the platform and fir-tree fixing in the disc allows space for cooling-air entry to blade, may control blade vibration modes and heat transfer to disc rim.[1]The turbine blades have a golden colour in this engine cutaway.
A turbine blade is a radial aerofoil mounted in the rim of a turbine disc and which produces a tangential force which rotates a turbine rotor.[2] Each turbine disc has many blades. As such they are used in gas turbine engines and steam turbines. The blades are responsible for extracting energy from the high temperature, high pressure gas produced by the combustor. The turbine blades are often the limiting component of gas turbines.[3] To survive in this difficult environment, turbine blades often use exotic materials like superalloys and many different methods of cooling that can be categorized as internal and external cooling,[4][5][6] and thermal barrier coatings. Blade fatigue is a major source of failure in steam turbines and gas turbines. Fatigue is caused by the stress induced by vibration and resonance within the operating range of machinery. To protect blades from these high dynamic stresses, friction dampers are used.[7]
Blades of wind turbines and water turbines are designed to operate in different conditions, which typically involve lower rotational speeds and temperatures.
^"Nomenclature of Cooled Axial Turbine Blade – Turbomachinery Aerodynamic Design".
^The Cambridge Aerospace Dictionary, Bill Gunston,ISBN 0 511 33833 3
^Boyce, p. 368.
^Acharya, Sumanta; Kanani, Yousef (2017-01-01), Sparrow, Ephraim M.; Abraham, John P.; Gorman, John M. (eds.), "Chapter Three - Advances in Film Cooling Heat Transfer", Advances in Heat Transfer, vol. 49, Elsevier, pp. 91–156, doi:10.1016/bs.aiht.2017.10.001, retrieved 2019-08-30
^Goldstein, Richard J. (1971-01-01), "Film Cooling", in Irvine, Thomas F.; Hartnett, James P. (eds.), Advances in Heat Transfer Volume 7, vol. 7, Elsevier, pp. 321–379, doi:10.1016/s0065-2717(08)70020-0, ISBN 9780120200078, retrieved 2019-08-30
^Bogard, D. G.; Thole, K. A. (2006-03-01). "Gas Turbine Film Cooling" (PDF). Journal of Propulsion and Power. 22 (2): 249–270. doi:10.2514/1.18034. S2CID 54063370. Archived from the original (PDF) on 2019-03-07.
^Bhagi LK, Rastogi V, Gupta P (2017). "Study of corrosive fatigue and life enhancement of low pressure steam turbine blade using friction dampers". Journal of Mechanical Science and Technology. 31: 17–27. doi:10.1007/s12206-016-1203-5. S2CID 115023151.
A turbineblade is a radial aerofoil mounted in the rim of a turbine disc and which produces a tangential force which rotates a turbine rotor. Each turbine...
wind turbine was synchronized to a utility grid in Vermont. The Smith–Putnam wind turbine only ran for about five years before one of the blades snapped...
a generator. A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving...
resist forces on the blade. The aerodynamics of a horizontal-axis wind turbine are not straightforward. The air flow at the blades is not the same as that...
The Second Stage TurbineBlade is the debut studio album by American progressive rock band Coheed and Cambria. It was originally released on March 5,...
through the blades. A turbine composed of blades alternating with fixed nozzles is called an impulse turbine, Curtis turbine, Rateau turbine, or Brown-Curtis...
the turbineblades and loses energy. In 1876, John B. McCormick, building on Francis's designs, demonstrated the first modern mixed-flow turbine with...
A gas turbine, gas turbine engine, or also known by its old name internal combustion turbine, is a type of continuous flow internal combustion engine....
and angled turbineblades, which do not absorb kinetic energy from the fluid mass as well as radially straight blades. Since the turbineblade geometry...
TurbineBlade Design" US Department of Energy (2019), https://www.energy.gov/eere/wind/downloads/optimized-carbon-fiber-composites-wind-turbine-blade-design...
Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the...
that the engine can survive a compressor or fan blade breaking off within the engine and a turbineblade breaking off within the engine, without fragments...
turbineblades are made of fiberglass and some only had a lifetime of 10 to 20 years. Previously, there was no market for recycling these old blades,...
and generating voltage below 1000 Va.c. or 1500 Vd.c. Turbineblades for small-scale wind turbines are typically 1.5 to 3.5 metres (4 ft 11 in – 11 ft 6 in)...
when superheated. In all turbines the blade velocity is directly proportional to the velocity of the steam passing over the blade. Now, if the entire energy...
known as the “Keywork”. Year of the Black Rainbow and Second Stage TurbineBlade narrate the struggle of Coheed and Cambria Kilgannon against Wilhelm...
increases, the fan blade tip speed increases relative to the LPT blade speed. This will reduce the LPT blade speed, requiring more turbine stages to extract...
speeds. There are several closely related wind turbines that use straight blades. This design of the turbine was patented by Georges Jean Marie Darrieus...
The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined...
helical turbine (GHT) is a water turbine evolved from the Darrieus turbine design by altering it to have helical blades/foils. Water turbines take kinetic...
accounts for less than 3% of a wind turbine's expense while blade pitch malfunctions account for 23% of all wind turbine production downtime, and account...
adds swirl to the fluid and directs it to the next row of turbineblades mounted on a turbine rotor. The angles in the absolute system are noted by alpha...
Offshore Wind TurbineBlade". Offshore Wind. Retrieved 3 March 2023. Nield, David (24 July 2023). "The Largest And Most Powerful Wind Turbine Ever Built...
February 2002 the band released its first studio album The Second Stage TurbineBlade after signing with Equal Vision Records. Influenced by the post-hardcore...
axis wind turbine having an upwind rotor with 3 blades, attached to a nacelle on top of a tall tubular tower. In a wind farm, individual turbines are interconnected...
Global Information
