Search found 11 matches

by M.Hammam
Thu Jul 09, 2020 6:44 am
Forum: Computer-Aided Engineering Software Tools
Topic: standalone YawDyn
Replies: 2
Views: 149

Re: standalone YawDyn

Dear Jason,

many thanks for your persistent support. It is very helpful.


Mohamed
by M.Hammam
Thu Jun 25, 2020 9:23 am
Forum: Computer-Aided Engineering Software Tools
Topic: standalone YawDyn
Replies: 2
Views: 149

standalone YawDyn

Hello,

Could you help me find a standalone version of YawDyn seperate from FAST, please? I need it to do some free yaw analysis for a small wind turbine.

Thanks,

Mohamed
by M.Hammam
Mon Apr 13, 2020 8:48 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST theory manual
Replies: 319
Views: 48508

Re: FAST theory manual

Dear Jason,

would you please send me the FAST theory manual ?

My email is m.hammam@eng.psu.edu.eg

thanks and regards,

Mohamed
by M.Hammam
Tue Feb 03, 2015 5:38 pm
Forum: Rotor Aerodynamics
Topic: required UAE data
Replies: 0
Views: 4451

required UAE data

Hello everyone, i wounder if i can get access to some NREL Ph.VI sequences to validate an aerodynamic model that i am building? Instead of digitizing the data from literature i thought to ask from the source as i am going to use this for publication. I will acknowledge Nrel in the publication. i nee...
by M.Hammam
Wed Jun 15, 2011 2:47 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Calculating the Azimuth Angle used in GDW
Replies: 3
Views: 2294

Re: Calculating the Azimuth Angle used in GDW

Thank you for the explanation. But, if i do not consider furling, what is the used equation in calculating the rotor azimuth angle for the GDW model? Also, if i just want to consider wind speed change (gust) without considering the change in wind direction, would GDW model be appropriate to calculat...
by M.Hammam
Tue Jun 14, 2011 10:46 am
Forum: Computer-Aided Engineering Software Tools
Topic: Calculating the Azimuth Angle used in GDW
Replies: 3
Views: 2294

Calculating the Azimuth Angle used in GDW

Hello all, As i know the axial induction factor is determined from the following equation at aerosubs/ SUBROUTINE vindinf: A(iRadius,iBlade) = A(iRadius,iBlade) + xphi(Rzero,mode) * ( xAlpha(mode) * COS( REAL(MRvector(MODE)) * Windpsi ) + xBeta (mode) * SIN( REAL(MRvector(MODE)) * Windpsi ) ) where ...
by M.Hammam
Tue Feb 17, 2009 3:51 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Two questions concerning the NREL phase VI wind turbine
Replies: 5
Views: 8160

thanks Lee for your reply i think my question was not clear so i will reformulate it. considering the WT_PERF simulator, if i want to compare the predicted results using WT_PERF with the measured power of the NREL phase VI turbine available at 3 deg tip pitch angle, should i enter the blade pitch an...
by M.Hammam
Sat Feb 14, 2009 12:56 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Two questions concerning the NREL phase VI wind turbine
Replies: 5
Views: 8160

Two questions concerning the NREL phase VI wind turbine

Hi all, i have two questions concerning the NREL phase VI wind turbine, and i hope to receive the reply soon! 1- phase VI wind turbine has been tested at 3 deg tip pitch angle, however the blade tip has local twist of about - 1.78 deg with respect to the zero twist at 75% blade-span as found in &quo...
by M.Hammam
Sat Jan 17, 2009 2:58 am
Forum: Computer-Aided Engineering Software Tools
Topic: hub loss model in WT_Perf
Replies: 1
Views: 1897

hub loss model in WT_Perf

Hello,

when i tried to calculate the BE data using WT_Perf i found that the program neglected the hub loss calculation, though i activated the hub loss model to true in the WT_Perf input file (wtp).

any sugesstions about that problem?

thank you

M.Hammam
by M.Hammam
Fri Feb 29, 2008 4:20 pm
Forum: Rotor Aerodynamics
Topic: required experimental data
Replies: 0
Views: 22529

required experimental data

hi all, i would like to ask where to find experimental data ( power vs. wind speed , thrust vs. wind speed, power coefficient vs. tip speed ratio) together with a description for the turbine rotoroperating conditions and detailed blade topology and geomtry , for AWT 27 wind turbine for example or ot...
by M.Hammam
Fri Jan 25, 2008 2:42 am
Forum: Airfoils
Topic: the vitrna's model
Replies: 1
Views: 38140

the vitrna's model

hello all, i would like to ask if there is a firm rule for choosing the stall (initial) angle of attack together with its coressponding lift and drag coefficients which are used in Viterna's model to extend the airfoil characteristics up to 90deg, because i noticed that increasing the initial lift a...

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