Blade Element Momentum Theory
Blade Element Momentum Theory
(OP)
Hi there, im currently an undergraduate looking at trying out different airfoils for analysis to do with tidal turbine blades. I'm currently researching previous papers about blades that have been designed and they talk about using BEMT. They give all parameters required but I don't know how to input these or get results anywhere. The graphs/ answers they recieved were chord length(m)vs(r/R) and blade twist angle(degrees) vs (r/R).
The whole process is somewhat confusing at the moment and is causing me to stress a lot!
Any help on the matter would be much appreciated!
Thank you :D
The whole process is somewhat confusing at the moment and is causing me to stress a lot!
Any help on the matter would be much appreciated!
Thank you :D





RE: Blade Element Momentum Theory
another day in paradise, or is paradise one day closer ?
RE: Blade Element Momentum Theory
STF
RE: Blade Element Momentum Theory
RE: Blade Element Momentum Theory
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Blade Element Momentum Theory
I took a quick glance at the wiki article http://en.wikipedia.org/wiki/Blade_element_momentu... and it seems accurate enough. Go ahead and read to indulge your curiosity but if this is an undergraduate project I would not implement your own BEMT code. To do it properly for wind turbines (which are basically the same as tidal turbines) there are several corrections that you need to apply. Furthermore like any numerical method there are all these different potential pit fall's you need to be aware and correct for to make a robust code required for general use. In other words implementing BEMT is too much work to complete within a typical under project time frame.
Instead I would use free code by NREL they use to have a stripped down easy to use version called wt_perf but I couldn't find it instead use https://nwtc.nrel.gov/AeroDyn. This should give you what you need to get the different forces.