Optimum wind turbine blade design with xfoil

[ginobee2000]

thank you dtango..sorry for your browser.. may be u have to get the google browser...

hello horstclaude. i just checked your blade design software and it was very nice...i will site u very well...it is good.. i will talk to my supervisor about it.

cheers..zehr gut..ich bin gluklich für u.. du bist sprechen deutch!.. hurray cia

 

[ginobee2000]

hello horstclaude i tried using ur program. i fink it a little bit complicated.. do u have a tutorials for this program.. thanks

 

[HorstClaude]

You can download the Guidelines from the download section, they explain the most basic functionalities. Otherwise have a look at the XFLR5 Guidelines, as they explain the Functionalities of XFLR (which is part of my software). Download the XFLR package at sourceforge, the Guidelines are included there. Other than that if you have any specific questions just ask me. It might be a bit tricky to configure QBlade for the first time, try doubleclicking the graphs to reset them. other than that you might want to try to hold ctrl while creating a blade - that enables you to have full 3D control with the mouse...

have fun

Horst

 

[ginobee2000]

well. i have already analysed my airfoil.. which are from mh102 to mh110.

i have the polars saved in txt file which i copied to MS Excel from which i was able to make the graphs for the lift coefficient now if i want to copy this polar to QBlade how do i do that or in which format is the file suppose to be. because i tried doing this yesterday and it wasnt working

 

[HorstClaude]

ok... you should export a polar from QBlade, then you see which format you need.
bring the polar in the right format and create a foil which has exactly the same name as the polar in the file that you created... then the polar should appear in qblade.

 

[ginobee2000]

the polar i had was in txt file format...when i try to export it does not work...but when upload the mh airfoils it does come up showing the plot...

 

[HorstClaude]

sorry, i don't get your point. Just export any polar that you created in qblade. create a basic naca foil, analyse it and then export the polar and from this you can check which format you need. then create a spline foil and name it as the polat you want to import. then import the polar, this works...

 

[ginobee2000]

i donno i fink it will be better if u..can analyze a simple naca 0012...

and write a step by step procedure to follow.. pls..thanks

 

[HorstClaude]

First you go to "Direct Foil Design", create a NACA0012 Foil there.
Then go to "XFOIL Direct Analysis". Here you create a Polar. Just click Polars->Define an Analysis. When you created the Polar you can run an analysis by clicking the "Analyse" Button on the right side. Then click Polars->Current Polar->Export. Now open the created file and copy your polar data from excel into the file, the file must still have the same format afterwards. In this file you must change the name of the foil to the foil that you want to import. Then create a new foil with exactly the same name in the "Direct Foil Design" module. Now you can import the file that you created by clicking Polars->Import XFOIL polar. The polar should now appear connected to the foil you just created. I hope this works...

 

[ginobee2000]

thanks... i fink this should work.

well HORST i tried to optimize the chord,c(r) along the blade using the expression below

C_opt=16πR(R/r)/(9λ^2 B) ...where B=3, λ=7, r= 0.4, 1, 2, 3, 4,5,6,7,8,9,10

from the root of the blade when i calculated the values of the c(r) i got a very big values when i used the ms excel. which i fink it not right. pls can u show me how to optmize my blade chord. well this is what i got when i put various parameters in the formula above.


i got the c(r) in every 'r' sections to be:

0.25m
8.548551438m
4.274275719m
2.849517146m
2.13713786m
1.709710288m
1.424758573m
1.221221634m
1.06856893m
0.949839049m
0.854855144m

am i in the right path.

 

[MESFINE]

Hello my dears

i am a new user and i don't know if you guys allow me to participate in your forum, anyways please let me in. I am working on design and fabrication of horizontal axis wind turbine and generator for electricity application.
By now i am already design the blade geometry based on bemt equations but i am not pretty sure about the result i found coz the design process is very iterative so i need to work with an optimization software to do so like "xfoil' but i did not work on it, so if anybody who can help me please contact me soon.

With best respect!
Mesfine

 

[Srikripa]

Hey everyone...

I have been assigned a project on utilizing the qblade software to analyse exising as well as new systems in my country... i feel completely lost with regard to using it... i was hoping you could help me... how do i go about using the software