Turbine Definition and 545 Threads

A turbine ( or ) (from the Greek τύρβη, tyrbē, or Latin turbo, meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with 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 fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels.
Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given both to Anglo-Irish engineer Sir Charles Parsons (1854–1931) for invention of the reaction turbine, and to Swedish engineer Gustaf de Laval (1845–1913) for invention of the impulse turbine. Modern steam turbines frequently employ both reaction and impulse in the same unit, typically varying the degree of reaction and impulse from the blade root to its periphery. Hero of Alexandria demonstrated the turbine principle in an aeolipile in the first century AD and Vitruvius mentioned them around 70 BC.
The word "turbine" was coined in 1822 by the French mining engineer Claude Burdin from the Greek τύρβη, tyrbē, meaning "vortex" or "whirling", in a memo, "Des turbines hydrauliques ou machines rotatoires à grande vitesse", which he submitted to the Académie royale des sciences in Paris. Benoit Fourneyron, a former student of Claude Burdin, built the first practical water turbine.

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  1. S

    How does a nozzle work (in a steam turbine)?

    Hello, For sometime now I've been into electronics and i have forgotten most of my meager knowledge in thermodynamics. . Could you explain how a convergent-divergent nozzle works ? Steam at high temperature and high pressure but relatively low speed enters into the nozzle. Then why...
  2. R

    Solving for Revolutions: Electric-Generator Turbine

    Homework Statement An electric-generator turbine spins at 3600rpm . Friction is so small that it takes the turbine 16.0 min to coast to a stop.How many revolutions does it make while stopping? Homework Equations The Attempt at a Solution (3600rev/min)(16.0min)=57600 i...
  3. T

    Question about gas turbine instrumentaion if u can

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  4. S

    Air driven turbine for generator and flywheel?

    Hello... new to forum... I am looking into design of a forced air turbine that will drive a generator and flywheel. The flywheel would be utilized for short periods of zero air supply and as an energy resevoir to maintain revs at an optimum level. Dimensions: Turbine/AC generator/flywheel...
  5. H

    Regenerative Air Standard Gas Turbine

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  6. J

    Wind turbine energy HW Question

    Hi everyone. I am having extreme trouble finding the answer to this problem. I thought I originally had it, but nope. The original Q is: "Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 65 meters and a wind-conversion efficiency of 25 percent. The turbine...
  7. Q

    How Can I Accurately Model Turbine Blades in CFD Using COMSOL/FEMLAB?

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  8. D

    How to create a solor powered working steam turbine?

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  9. T

    Can a Wind Turbine Improve the Efficiency of a Moving Car?

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  10. T

    Could a Tesla Turbine Power a Wheel or Propeller for Propulsion?

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  11. P

    Thermonuclear plasma turbine powerplant?

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  12. K

    Energy Violation Puzzle - The use of Negative Buoyancy to run a turbine

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  13. Ivan Seeking

    Engine on a chip - the millimeter size turbine

    http://www.tfot.info/content/view/114/
  14. G

    Small turboshaft turbine with 140kW

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  15. Arctic Fox

    Any such thing as small steam turbine ?

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  16. S

    Gas Turbine Plant: Combustion Process & Air-Fuel Ratios

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  17. S

    How Do Air-Fuel Ratios Affect Gas Turbine Temperatures?

    Going to be honest this is a ibt of homework i have been set but from the note i hae it doesn't make any sense what so ever! so any help would be greatly appreciated :-) A gas turbine plant is fuelled by Methane,. After compresssion the air and fuel enter the combustion chamber at a temp of...
  18. B

    How Does Blade Number and Wind Speed Affect Wind Turbine Efficiency?

    I'm doing an experiment (at A-Level) to see the efficiency of a wind turbine. I'm doing this by changing the number of blades and varying the wind speeds. I wondered if anyone had an equation that could look at efficiency? I have the current and the voltage (and wind speed). Sorry if I've...
  19. L

    How can a student create a gas turbine engine from scratch?

    Hello guys, I'm a second year BSc aerospace student in Holland, and I'm thinking about making a gas turbine engine. I hope to specialize in powerplants eventually. You people seem knowledgeable, so I thought I'd ask my question here. Anyway, bare with me a bit... I first thought about...
  20. A

    Why Do Turbines Have Multiple Stages?

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  21. S

    Temperature of the back of a turbine jet engine (or something like that)

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  22. DaveC426913

    Aerodynamics of modern wind turbine

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  23. P

    Energy available to a wind turbine, Bern.'s eq

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  24. P

    Energy available to a wind turbine

    HI folks, new to this forum. I'm in a Fluid Dynamics class and need to make a presentation on Bernoulli's conservation of energy equation as it applies to wind turbines. I think I understand the different energies involved here: kinetic(v^2/2), pressure(P/rho), potential(zg)... I want to...
  25. P

    Aero engine without gas turbine

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  26. N

    A technical question: Turbine run back.

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  27. J

    Torque difference: steam turbine vs. piston?

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  28. S

    Quality coming out of the turbine

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  29. S

    Conditions are adiabatic and reversible about a turbine

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  30. A

    Electric motor that was attached to a small turbine

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  31. M

    Solving Turbine Force: Vo = +21 m/s, Vf = -21 m/s, 27.2 kg/s

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  32. J

    Calculating Mass Flow Rate of Steam Turbine

    Steam enters a turbine at 3 mpa and 450 c, expands in a reversible adaibatic process, (KE and PE are negligible) and exhausts at 10 kpa. The power output of the turbine is 800 kW. What is the mass flow rate? I did the problem but I don't know if the anwser is correct and wanted to check...
  33. O

    Can a Car Airconditioning Compressor be Used as a Pico Steam Turbine?

    Hi All, I am a solar thermal enthusiast seeking to try out a few things. I need some info on using car aircondition compressor as a pico steam turbine if it is possible. Links, suggestions and opinions are welcome. Regards, Solomon.
  34. B

    Wind Turbine Blades and Wind Speed Performance

    I wonder if anyone could shed some light or information about the subject I'm looking into. How will wind turbines with varied amounts of blades perform in varied wind speeds. E.g. the less amount of blades you have the better a turbine will perform at higher wind speeds? Any help on the...
  35. J

    Steam Turbine generator work done

    I will start my junior year as a ME major in the fall, I currently am working for a power company on a co-op. I work with the Predictive Maintance department corporate so I am not at the plant all the time but have a question about the turbine that might be more of a generator question. If...
  36. J

    Calculating Steam Turbine Work & Power from 2 Unknowns

    A steam turbine has an inlet of 2kg/s water at 1000kPa and 350C and velocity of 15m/s. The exit is at 100kPa, 100% quality and very low velocity. Find specific work and power produced. I have done a lot of these problems but it usually says adiabatic or the inlet and exit temp is the same...
  37. J

    Calculate Work & Power of Liquid Water Turbine

    A liquid water turbine receives 2kg/s water at 2000kPa, 20C, and velocity of 15m/s. The exit is at 100kPa, 20C and very low velocity. Find specific work and power produced. From my tables I get hi=85.82 kJ/kg he=84.03 kJ/kg Energy equation reduces to: \begin{array}{l} h_i +...
  38. S

    Exploring the Difference in Turbine Design: Wind Power vs. Hydro Power

    hello, there is a question bugging my head for quite some time.. why wind power plant has lesser turbine blades while the one in hydro power plant has more?... is it due to the density of the fluid? thanks
  39. A

    Can a Dam Turbine Meet a Paper Mill's Energy Needs?

    a mill requires 5000kW to operate at full capacity, produces 14tons of paper per hour, purchases electricty for $.10/kW*hr There is a dam 10m high that supplies water to a turbine. the river can be used only if the flow is above 50 cubic ft/sec. efficiency of generator is 75% how am i...
  40. P

    Calculating Wind Turbine Radius for 571 W of Power

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  41. S

    Optimizing Fuel Injector Orientation for Increased Thrust in Gas Turbine Engines

    Why does the pressure in the burner of a gas turbine engine drop when you are increasing the internal energy of the air?
  42. R

    How Much Power Does a 35% Efficient 80m Wind Turbine Generate at 30kph?

    I have a Thermo I problem: Given: 80m diameter wind turbine rotating at 20rpm under steady wind conditions at an average wind velocity of 30kph. The eff of the system is 35%. Need: Power generated Assumptions (made by me):delta PE ~0; mass=constant; operating at Steady Sate; T~constant...
  43. I

    Turbine generator + higgs boson

    My friend is wondering if its possible to use the energy of a higgs boson to use in a turbine generator. Is that possible?
  44. M

    Finding Turbine Angular Velocity given Net Head, GPM, and power from Alternator.

    An alternator attached to a water turbine generates 35 Watts given 50 feet of head and 10 gallons per minute. Assuming that the efficiency of the alternator is 50%, is it possible for me to find the angular velocity from this information? If so, how would I do it?
  45. Z

    What is the Most Efficient Blade Design for an Air Driven Turbine?

    What is the most efficient shape of an air driven turbine? I want to achieve the greatest possible torque with the lowest volume of air. I hope I am posting this in the correct place. If not, any links would be helpful. Thank you very much.
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