What is Turbine: Definition and 544 Discussions

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. H

    Maximum work delivered by a turbine

    Hi everyone : I have a question: how to calculate the maximum work delivered by a turbine. Steam input T and pressure are given plus the outlet pressure only. Using Peng-Robinson equation of state. Adiabatic process. I tried to find outlet temperature by trial and error using Peng-Robinson EOS...
  2. L

    Fuel efficiency, turbine vs stroke generator

    Hi, I'm trying to figure which is more fuel efficient, turbine vs stroke generators. This honda stroke engine generator does 1000w for 3.8 hrs with 0.6 gallons of fuel or 2.3 liters, so the power per liter of fuel is 1,300 kW. http://powerequipment.honda.com/generators/models/eu1000i Then I...
  3. B

    Design a wind turbine experiment at the High School level

    Homework Statement [/B] Plan an investigation to evaluate wind power as an energy source with equipment: • model wind turbine • multimeter to measure the voltage generated • anemometer to measure wind speed • hair dryer to generate wind power, set on cold • metre rule to measure...
  4. S

    How to design a wind axial turbine working with an air stream....

    I want to design a wind toubine ,I know the wnd vel,I need certain amount of power ..How to design it and how to calculate at which rpm will it rotate to deliver my required power?
  5. M

    Gas Turbine & Psychrometric chart

    Hi Everyone, So I seem to have many problems understanding the Psychrometric chart and its physical meaning. First of all, I would be so thankful if you could introduce me a source which can be useful to physically and fundamentally understand the dew point, effect of pressure, humidity... and...
  6. Carlko26

    Turbocharger: Mass flow rate and pressure ratio

    Hello everyone, i am currently dimensioning a compression system using a vehicle turbocharger and need to find a way to relate the pressure ratio of the compressor and the mass flow rate. (flows trough compressor and turbine are of course separated) For the turbine, one can use Stodola's...
  7. G

    Wind Turbine, wind direction, air direction, drag direction?

    In the aeroplanes, the drag is in the opposite way of the direction of the aeroplane. My questions for wind turbine: 1) Why "wind speed" and "the drag on the blade" is in the same direction? Shouldn't be the opposite? 2) Are freestream velocity and the wind speed same thing? 3) Are the drag...
  8. R

    Heating water with a wind turbine

    Hello, I know there is a similar topic but it has been closed. It is about a wind turbine that generates wild AC from 0 to 240V(open voltage) for a maximum of 1500W. Instead of using a charge controller, a battery bank and an inverter I would like to connect a water heating element directly to...
  9. ElegantSir

    Law of Conservation of Energy of a wind turbine

    Homework Statement "identify the type of energy conversions present in each of the following situations. Some questions may use multiple types of energy." 1) a wind turbine producing electricity 2) two children sliding down a hill on a toboggan 3) a toaster oven browning a bagel Homework...
  10. V

    Help with Buckingham Pi theory on turbine

    I was wondering if someone is very well into the Buckingham Pi Theory and can assist me in understanding the outcome. I have two dimensionless equations and I need to get an understanding on how they were made by the Buckingham Pi theory. The situation is considered for the reynolds number...
  11. Brakwa

    Is my air ejector condenser causing vacuum issues?

    Having trouble at a plant where the vacuum has increased to the point where a pump has been put on the end of the air ejector condenser to maintain vacuum, without it the limits would be too high and trip the Steam Turbine. The question is, does the air ejector condenser continuously drain...
  12. M

    Finding Turbine Inlet State - Thermodynamics

    Homework Statement max. Turbine work output rate: 6.0MW Turbine isentropic efficiency: 90% Turbine exit state (isentropic): 40KPa, x=92% Turbine and pump actual process are assumed adiabatic Find turbine inlet state: Pinlet, Tinlet, Sinlet Homework Equations W = ΔH h = hf + xhfg The Attempt...
  13. M

    Designing a pico hydro turbine and generator

    I'm working on a project right now which requires a hydro turbine generator system requiring 120W of power output capable of working with the following specs: Flow: 0.003m^s/s Pressure: 6m head By my calculations, this should require an efficiency of ~66%. All flow must be in the axial...
  14. toforfiltum

    Electrical power generated by wind turbine

    Homework Statement Homework Equations P=FV The Attempt at a Solution To calculate the mass of wind swept by turbine in a second, I take 2000m2 ×10ms-1×1.3kgm-3.Then, to calculate the force I multiply the answer with 10ms-1. Since they want the power and the yield is 50%. I multiply the...
  15. OnLy-_-1

    Eletric motor with wind turbine (And in side small generator

    Hello all my friends...! This is my first discusion about this type of discusion , so let make long short story i read people from 2009 want to find way how to use wind in car producion or self use... I was thinking let me try to find way to get solution on that problem so after long thinking ...
  16. S

    What is the flow through pipe in an open channel?

    I know this is easy but i need to know the flow velocity through a pipe reducing in diameter inside a canal. the water velocity is 3m/s water depth is 1.5 m the pipe is at the bottom inlet diameter 0.9m small reduced diameter 0.6m outlet diameter = 0.8m note: this is an open canal with...
  17. voltech444

    Gas Turbine Afterburner Water Injection

    Hey I've been thinking of this idea for a while, If I had a small boat with a home made gas turbine engine on it to power it solely with thrust. If I put an afterburner on it and nozzle; and had a small intake for water that filtered out all of the crud. Would it be possible to generate more...
  18. C

    Superheated Steam Turbine - on a question please

    1. Superheated Steam enters a turbine with a pressure of 10 bar and a temp of 300 degrees celcius, and exits with a pressure of 0.046 bar. As the steam flows through the turbine it undergoes adiabatic expansion according to the law pv to the power 1.131 = constant From Steam tables I have to...
  19. Alex734

    Calculation of the tangential forces in a turbine blade

    Dear All, I am trying to perform the static analysis of turbine blade in ANSYS. And i have a problem with finding the values of tangential force. How can i find it, if have following data: operating speed - 3000 RPM, stage power - 1413 kW, axial load 5544 N, number of blades - 45. Thanks a lot!
  20. A

    How Does the Brayton Cycle Work in Gas Turbines?

    Hi I am new member ( mechanical engineer student ) , and the college just add a new course which is Turbo machinery , any way the teacher is new to the course & the quality of our teacher is not that good so , I was having a question and ask him but didnt get much from him so here I am ^^When...
  21. G

    Where in the world can i purchase a A ram air turbine Rat_

    where in the world can i purchase a A ram air turbine Rat.._ i want to mount it on the roof of my rv trailer build. and use it as a wind turbine generator as i drive down the road, to recharge my batteries.. i heard you really can't use a regular wind turbine or can you..?? or will it just...
  22. D

    Savonius Wind Turbine: Power Output & Lever Arm Effects

    Given a certain sized Savonius Wind Turbine, for example, using a 5 gallon bucket (about 12 inches in diameter and 14 inches tall) cut vertically in half, the standard configuration has the two "scoops" either touching at the central vertical axis, or partially overlapped. Would moving both...
  23. S

    Steam Turbine Design for Waste Heat Recovery Plant

    i need the design data of a reaction steam turbine in order to complete my project..My project is about waste heat recovery plant..
  24. O

    12V Wind Turbine - Voltage question

    Hi, I have this wind turbine (http://m.ebay.co.uk/itm/251320008073?nav=WATCHING_ACTIVE&skus=Output:12V&varId=550270984212) in the UK, wall mounted about 18ft, its not in the best position, but it still turns pretty fast, enough to hear the blades spinning from inside, and for it to generate...
  25. A

    The second law efficiency of compressor in gas turbine cycle

    hi friends, I've used the following equation in Thermodynamics: an engineering approach(Cengel) for calculating exergy efficiency of compressor. In fact, for an adiabatic compressor with negligible kinetic and potential energies, the second-law(exergy) efficiency becomes...
  26. O

    Wind Turbine - 3 Phase-AC to DC

    Hi, I have a 300-400w wind turbine which generates 3-Phase AC @ 12v 33.33Amps Maximum. The wires are colour coded Red, Black, Blue. I have a 3-Phase AC to DC rectifier which can handle up to 1200v @ 50A. Currently I have it connected like so; Red, Blue, Black. I'm wondering, does it matter...
  27. S

    Turbine: Straight or Rotational airflow?

    I'm working on a project now and I'd like to know which type of airflow would power a turbine faster/better straight or rotational? Or will rotational airflow even have any effect on the turbine...? P.S. When I say rotational airflow, I mean circular airflow that rotates in the same direction...
  28. A

    Some basic questions about the second law efficiency (gas turbine cycle)

    hi , will change first law efficiency proportional to second law efficiency? for example in gas turbine cycle, how change? other equation: hi , will change first law efficiency proportional to second law efficiency? for example in gas turbine cycle, how change? other equation: How is the...
  29. Q

    How to calculate wind turbine output?

    Homework Statement Basically, a wind turbine's connected to a car alternator. weight of turbine=72 kg length of blade-30 cm. What is required, is the amt of power this wind turbine will produce when the car (to which turbine is attached) is moving at: a) constant speed b) variable speed...
  30. Q

    Wind turbine powering alternator of car instead of engine?

    So, my proposition is this: (Note that this is a purely theoretical project, and no models/experiments are necessary.) When a car moves forward, wind moves backward, right (relatively). So if we were to attach a small, retractable wind turbine to the side, connect it to the alternator, we could...
  31. profinger

    Air turbine? to increase air speed/compress air

    Is there such thing as a turbine that increases air speed/compression? This seems like a dumb question but I'm having a heck of a time locating any information on it because any iteration of "air turbine" entered into Google just brings up information about wind mills. I'm looking for something...
  32. A

    Exergy analysis gas turbine cycle For EEs

    hi friends, I am working EES software for thermodynamic lesson,I am analyzing second law efficiency(exergy efficiency) and exergy analysis for all components of gas turbine cycle. Now I have a problem,exergy efficiency of turbine decrease with increasing before temperature,why? As you know...
  33. P

    Calculating hydraulic cylinder size wind turbine tower

    Hello, I could use some help determining what size hydraulic cylinder I need to be able to tilt my turbine tower up. What I have is a 70 ft tower where the first 20 feet weigh 2500 lbs, the 2nd 20 weigh 1700 lbs and the 3rd 20 ft weigh 1000 lbs and the last 10 feet weigh 1000 lbs. For a total...
  34. N

    How can I test the load output of my hydro turbine without breaking the bank?

    Hi Everyone, I am building a hydro turbine, I am expecting it to produce circa 4 kw possibly as high as 7 kw depending on flow. I am on a very limited budget. Please could you suggest possible means of getting load output data? I have considered attaching a heavy truck 24 v alternator and doing...
  35. D

    Calculating Distance and Acceleration of a Wind Turbine Blade Tip

    Homework Statement During a sustained wind the blades on a two blade horizontal–axis wind turbine is turning with an angular velocity of 5 rad/s. If initially the blades have an angular velocity of 2 rad/s, determine the distance point P on the tip of the blade has traveled in 3.0 seconds...
  36. C

    Thermodynamics Steam Turbine Specific Entropy

    Homework Statement The mass flow rate through a steam turbine operating under steady conditions is 100 kg/s. Steam enters the turbine at 12 MPa and 400oC. A mixture of vapour and liquid water exits the turbine at 10 kPa. At the exit state 93% of the mass of the water is in vapour form. The...
  37. L

    Solar Updraft Tower turbine design

    I'm attempting to design a turbine for a small scale solar updraft tower. It produces between 1-3 m/s of air flow in a 0.3m diameter tower. I'm in need of resources that can guide me on designing the turbine fan. I've already got the Wind Energy Handbook, however I'm not even sure if following...
  38. C

    How to calculate the power generated by a turbine (steam)?

    Firstly, let's assume the expansion is isentropic. An example I found: Mass flow = 0.5kg/s Pi = 6000 kPa Ti = 500 Celcius Pf = 30kPa From this, how do we find the power generated and final steam quality? Do we look at steam tables, W = m(flow) (h_1 - h_2) --- is that helpful?
  39. A

    Guidance in Gambit 2.4 -- How change airfoil chords in Wells turbine model?

    hi my dear friends, Wells turbine is the subject of the my Thesis: http://www.upload7.ir/imgs/2014-10/37346220310608280524.jpg i make below model in gambit 2.4 ,But now I want to make the upper airfoil cord bigger than the bottom one. below model is constant,attention to third pictures(...
  40. P

    Design Steam Turbine for Solar Energy: Math Help Needed

    im designing a steam turbine and boiler for a solar energy project but i can't figure out the math and have had trouble looking it up the only thing that is definite about the turbine (other than that its a tesla turbine) is that the thermal wattage is 5,855 watts or 1,434.72 calories per second...
  41. Femme_physics

    Average/typical twist angles of a jet turbine blade

    Hi guys, I'm trying to find info with respect to twist angles of a turbine blade (for airplane engines, let's say)... I read somewhere on the forum that it's typically 0-20 degrees. I'm trying to look for quoted sources though or at least second opinions on that matter.
  42. T

    Wind turbine: Optimum pitch angle changes at different wind speeds

    Homework Statement As part of a school project, I'm investigating the optimum blade pitch angle for a simple 6-blade wind turbine, powered by the air flow from a desk fan. I have taken power output measurements using angles in 5° intervals from 0° to 30° and found the optimum to be 20° in 5...
  43. F

    Calculating Compressor and Turbine Work in an Air Standard Gas-Turbine Cycle

    Homework Statement The pressure ratio of an air standard gas-turbine cycle is 8/1 and the inlet conditions to the compressor are 200 KPa and 30C. The turbine is limited to a temperature of 1500K and the compressor and turbine adiabatic efficiencies are 60 and 90 respectively. Calculate...
  44. Amr Ali 33

    Hey i need some help in calculating the thermal efficiency of steam turbine

    guys i just wanted to know the formula by which i can calculate the thermal efficiency of a pass out steam turbine( a steam turbine with an extraction for process ) I've attached a simple diagram explaining my problem can anyone please help !
  45. P

    Gas turbine that uses pressurised air as a school project

    hello. I have to design and test a gas turbine that uses pressurised air as a project. however the problem is, I don't know where to start. can anyone please help me? do I start with the blades or the housing? I have seen some videos on youtube, but this is a university project and I think its...
  46. S

    Answer: Hydraulic Efficiency of a Pelton Turbine

    The hydraulic efficiency of a turbine (let pelton turbine) is given by - (power developed by runner or shaft power)/(water power) shaft power is - (mass flow rate)*(Vw1+Vw2)*u water power is - density*g*Q*H My question is that the pressure head is converted into kinetic energy in nozzle then...
  47. R

    Energy and work of wind turbine

    Hi guys something basic that I can't understand: if I have a wind turbine , rotating due to some wind with no load , and no mechanical or drag losses in the blades or in the mechanics (no drag at all, I know its impposible ,but still) , the forces on the blades, create a Moment that accelarate...
  48. B

    Wind Turbine Reynolds number calculation verification

    Homework Statement Hi guys, I just wanted to verify my calculation of a reynolds number of a wind turbine. I understand that the reynolds number will vary in a spanwise direction along the blade due to changes in the characteristic length(chord width) and velocity(due to the tip speed...
  49. I

    Partial Expansion in high pressure Turbine in a Reheat Rankine cycle

    Please help me with this, In Reheat Rankine cycle, we first Expand the steam partially in a high pressure turbine and then reheat it again . How is this partial expansion in high pressure turbine done ? in the sense, what is the procedure followed to have only partial expansion of steam...
  50. K

    Gas Turbine: Full Load/Part Load Understanding

    Hi all, I am not able to physically understand the term "load" when we refer to Single Shaft Gas Turbine engines used for power generation purposes. What is causing the torque on the Gas Turbine (GT) to change? Again how the speed is maintained constant while the torque is varied? For a single...
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