Working of Francis Turbine


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100 thoughts on “Working of Francis Turbine”

  1. Danh Võ Thanh says:

    thank you

  2. Yahiya Tech says:

    thanks. nice explanation now i understood this concept.

  3. jayshree jessie says:

    very helpful for my engineering degree …………………………….

  4. Have a nice time! says:


  5. Muhittin Selcuk Goksu says:

    Çeviriyi yapan Özlem Çevikbaş'a çok teşekkür ederim.

  6. uwais sutar says:

    very useful….

  7. Biswajit Sen says:

    it was very helpful.. thank you

  8. gonzalo moreno andonaegui says:

    great, very helpful !! can you make a vido explaining the design of the blades of a compressor wheel please ?

  9. Alex Mills says:

    I'm not sure if it was better hearing a computer voice written by an indian, or hearing an indian do it wrong. ffs

  10. NAUSHAD AHMED says:

    Draft Tube increases the effective head on turbine. It has got nothing to do with cavitation ,period!

  11. Jay Daisuke says:

    I like this.


    we have blades in the turbine rotor/impeller and so why do we need guide vanes. stay vanes are more sufficient isnt it??, to direct the water towards eye of the impeller

  13. sarthak shinde says:

    which software use for animation

  14. Sheikh Aamir says:

    thanks a lot i am slow in the head so i was struggling with it by books

  15. parvesh verma says:

    Brother thankyou very much ..keep the good work going

  16. Mohammad Afsar says:

    goood help full

  17. vivek says:

    Why abd how people think dislike this type of videos 😈😈😈

  18. kanwarpal Singh says:

    what a remarkable presentation of Francis turbine

  19. Vamshi Konganti says:

    What is the difference between guide vane and stay vane

  20. Prithviraj Gohil says:

    sir can you please make make video on "what will happen if we don't use draft tube"?

  21. ALOK KUMAR says:

    Thanku so much to the team of learn engg. For making us feel of what we study in engineering..

  22. احمد علي says:

    thank you so much >>

  23. Muhittin Selcuk Goksu says:

    tercüman arkadaşıma da özellikle teşekkür ederim.

  24. César Alonso Sánchez Contreras says:

    I'm a bit confused, even if there was a low pressure on the exit of the turbine, where would cavitation form? Cavitation occurs when at a low pressure, bubbles of gas form, and then when exposed to an increment in pressure the bubbles implode and that is when you have trouble, right? It makes no sense to me to increase the pressure in the exit to "avoid cavitation"

  25. anchal dehariya says:

    burmarike cavitation ka hot h wo kon bata h…😂😂

  26. k.dinesh s.kaliyaperumal says:

    thank u so much. it is very helpful to me

  27. 1mikechung says:

    Look at this new wind turbine

  28. ابراهيم الحسيني says:

    شكرا شرح مفيد 🌸

  29. sangam singh says:

    is this mixed flow type

  30. ابراهيم الحسيني says: شرح

  31. vancebarcelona says:

    Francis turbines are the most preferred hydraulic turbines. It contributes about 60% of the global hydro power capacity mainly because it can work efficiently under wide range of operation conditions. The most important part of a Francis turbine is its runner. It is fitted with complex shade blades. In the runner, water enters radially and exits axially. During the course of flow, water goes through the runner blades. Francis turbine blades are specially shaped. We can note that blades are having thin airfoil cross section. So, when water flows over it, low pressure will be produced on one site and high pressure in the other site. This will result in a lift force. We can also note one more peculiar thing about the blade. It is having a bucket kind of shape towards the outlet. So, water will hit, and producing impulse force before leaving the runner. Both impulse force and lift force will make the runner rotate. So Francis turbine is not a pure reaction turbine. A portion of force come impulse action also. Thus, when water flows over runner blades, both its kinetic and pressure energy will come down. Since flow is entering radially and leaving axially, they are also called mixed flow turbine. Runner is connected to the generator via shaft for electricity production. This arrangement is fitted in a spiral casing. Flow enters via inlet nozzle. Flow rate of water will get reduced along length of casing, since water is drown into the runner. But decreasing area of spiral casing will make sure that water flow is entered to runner region almost at uniform velocity. Stay vanes and guide vanes are fitted at the entrance of runner. The basic purpose of them is to convert one part of pressure energy to kinetic energy. Flow which is coming from the casing meets stay vanes, they are fixed. Stay vanes steers the flow towards runner section. Thus, it reduces inlet flow. Demand for power changes over time. The guide vane mechanism is used to control flow rate and make sure that power production is synchronized with power demand. Apart from controlling flow rate, guide vanes also control flow angle to inlet portion of runner blade. Thus, guide vanes make sure inlet flow angle is the optimum angle of attack for maximum power extraction from fluid. Low pressure at the outlet of the turbine may cause serious problems of cavitation. So, a special draft tube is designed is fitted at exit site to discharge the fluid out. Draft tube will transform velocity head to static head due its increasing area that will reduce effect of cavitation.

  32. Rahul Singh says:

    Helpful for me

  33. joe mar samson says:

    Does someone sell this apparatus in the philippines? Where can I buy one?

  34. Vaishnavi Yernale says:


  35. Dacklen Sundeep says:


  36. Tore Forsgren says:


    Some popular science explanation is need..

    The draft tube gradually widens in area and slows the fluid down before it exits. Slower speed means something has to hold the horses back and the only way that could happen is a pressure gradient. Each tiny flow element will have to feel an external net force reducing its speed.

    The only way to have a net force that affects speed is to feel more pressure on your face than on your back. As the first guy exiting the draft tube enters free air with his "face pressure" only defined by the water depth of exit, the gradual pressure forces will pile up like in a battery stack and you will have the minus pole of the pressure gradient sum at the inlet of the draft tube.

    So the draft tube is a pressure battery stack driven by kinetic energy and introduces much wanted reduced pressure at the turbine exit. A side effect is any factor of cavitation will increase.

    If the design is subject to cavitation you can add static pressure to the turbine by placing it as low as practically possible, sometimes located far below the water level of the exit.

  37. Tahir Waqas says:


  38. Sarwar Nezar says:

    The problem is that what so called Guide Vanes will also reduces the velocity of the flow due to the friction and change in the direction of the flow. So the gain in energy relating to that could be small or nothing.

  39. Prathmesh Patil says:

    so nice

  40. Ahmed Malik says:

    That's very good informations thanks

  41. Hrishikesh Danawe says:

    Can we use this design for air compressor which takes in air radially and throws out axially?

  42. forster hydro turbine generator says:

    If you need, please contact me,
    the best water turbine supplier from China.
    [email protected]

  43. Teddy KGB says:

    This good video.

  44. Chun C. Li says:

    OMG this is in English

  45. Wade Haden says:

    So why is this device not connected to every source of moving water?

  46. George Joseph says:

    You sound like lost voice guy in Britain's got Talent

  47. Sameer khan says:

    What software you are using to make such a animation ?

  48. #dk world says:

    Tq this is amazing v

  49. ahmad salmang says:

    Awsome…..thanks sir👌👌👌🙏🙏🙏


    Thats a really bad advertisement…thats really against the bro code…that guy is a real dickhead

  51. Siva Yeminedi says:

    Thanks sir

  52. Darcus Kingsly says:

    Reminds me of a turbocharger😀

  53. Suvrat Singh says:

    Excellent video 👍

  54. vivek tripathi says:

    Beautifully described

  55. Christopher a says:

    excellent video!
    clear, to the point, helpful visuals

  56. yuvraj patil says:

    Draft tube have no relation with cavitation..

  57. CB says:

    Man, can you imagine being the native English speaker who was forced to read this shitty google translate script? He probably was told if he didn’t read the shit Chinese or whatever translation, he wouldn’t be hired.

  58. Chillu7 says:

    Same working principle as Kaplan Turbine ??

  59. Ade Apem says:

    Please translate in indonesian language…

  60. Ashok Kumar says:

    Thank u

  61. Yakup Gümüştaş says:

    Quite satisfied. Extraordinary explanation!

  62. Sabarish Narayanan says:

    Video presentation is good and easy to understand..

  63. fitter technics says:

    Thank you so much for all the team members.🙏💐

  64. Golnaz Amintojary says:

    very helpfuuuul thank youuuuuuuu❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️

  65. Florian Töchterle says:

    really good video, better explained than my Teacher XD

  66. harshit shukla says:


  67. Kurniyadi Muttaqin says:

    Can u explain the electrical mechanism for some case that turbine also work as motor for pumping water ?

  68. Miego says:

    Oh yeah yeah

  69. NANDEESH D K says:


  70. CUBETechie says:

    So I can use a Turbo charger as an hydroelectric generator?


  72. Giesbert Fotzenschleim says:

    does it work the same way like a turbocharger? (the waste gas side)

  73. Mujahid Faraz Siddiqui says:

    Thank you for the video. It was very infromative.

  74. Oscar Lazo says:

    I just want to say that I find the dropped articles very annoying. For instance, you say "thus it reduces [the] swirl of [the] inlet flow" without the bracketed the's. Excellent video though!

  75. Sneha says:

    So what's cavitation ?

  76. Jacob D says:

    Why cavitation possess a threat??

  77. Sam says:

    Thank you so much for video sir👌👌

  78. eamon a says:

    bad day for a fish


    As a hydro power engineer your video was very useful for me. Because my first project was a vertical Francis turbine.


    Very good session thank you

  81. Tamil Selvan says:

    My mechanical engineering staff ever… thank u respected team

  82. Kranti J says:

    very helpful sir.Thankyou

  83. Çetin F. says:

    Çizimler yanlış makina iyice yanlış animasyon hatalı elinize sağlık

  84. Çetin F. says:

    Herkes teorikte birşeyler ezberleyip geliyor

  85. altGoolam says:

    Why does this guy speak English like a second language speaker?

  86. silverfoenix says:

    now attach a second francis turbine to the Draft Tube!

  87. aliceIn Vains says:

    Lift force with no compressible fluid? Is that correct?
    I tought it was just impulse force
    Is lift force really relevant against impulse force?
    Could anyone tell the % of each one?

  88. Thomas says:

    Guy will make video without word “the”

  89. michael lennon says:

    Thanks . Now I now how it works .I see some improvements can be made . But for now in 2019 it will be fine .

  90. Sankalp Kota says:

    This channel is amazing! Keep up the good work! Very helpful for learning about other engineering topics, as a materials engineer

  91. Furuya Hiroe says:


  92. Vijay Bhendwade says:

    Greatly explained

  93. the jafuu says:

    I was wondering if you could use big enough turbine to with hydraulic fluid to power something like lawn mower XD. Might sound stupid, but why not? And if needed there could be torque converter too. because if it would work, there could be small engine spinning pump that would move the fluid. That way lawn mowers could have smaller engine than needed.

    edit: Also i forgot that isn't this how some lawn mowers already move?

  94. Voice Over Gaming says:

    This is in my recommended

  95. Owen Martin says:

    is it safe for fish ?

  96. Siva Kalyan says:

    Awesome explanation. THANK YOU

  97. Abdulrahman Radwan says:


  98. indeuc says:

    Isn't the draft tube used to lower the pressure on the downside of the turbine to increase the pressure drop over the runner? From what i've learned the draft tube is actually causing more cavitation but there are ways to counter this.

  99. surya bhargav says:

    Super explaination but I need to know in deep and very keen information from point to point how turbine is been prepared and which type of material is been used

  100. Keerthana Jayakumar says:

    Thank you so much for making this video😇

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