1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Turbine Design Question

  1. Apr 10, 2006 #1

    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?

  2. jcsd
  3. Apr 10, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    It is probably a function of density (water has a density about 833 times that of air), speed of the flow both of which affect momentum and energy transfer. Water turbines are much more rigid because of the shear forces associated with the rushing water.

    I believe wind turbines are optimized on radius (length) of the blades. Adding one more blade would increase the mass by another 33%, perhaps without added advantage.

    The wind turbines cut out at around 65 mph (~97 ft/s), and I believe water turbine may have higher flows.
  4. Apr 11, 2006 #3
    That seemed like an interesting question to me. Here's something off the net:

    http://www.windpower.org/en/tour/design/index.htm [Broken]

    http://www.windpower.org/en/tour/design/concepts.htm [Broken]
    Last edited by a moderator: May 2, 2017
  5. Apr 11, 2006 #4
    thanks for the explaination... and the links proves very useful :)
  6. Apr 11, 2006 #5


    User Avatar
    Staff Emeritus
    Science Advisor

    Last edited by a moderator: May 2, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Turbine Design Question Date
Electrophoresis question Mar 12, 2018
Experimental details -- Heating hydrated barium nitrate Jun 6, 2017
CO2 scrubber design Feb 17, 2014
Fractional Factorials (Statistics). Design Identification Aug 7, 2013
Endothermic Design May 2, 2011