Prof Sorenson, Thanks for a great derivation of the Betz limit. However, I am struggling to understand something - In the control volume analysis slide, in the axial momentum balance, you have a term -mout*U0 representing the axial momentum of the air going out of the domain, ie the red top far-field boundary. I am guessing that the velocity here is (U0, v, 0) where v is a small y component, without which mout =0. Sam
There is something wrong with Betz limit if kinetic energy in the wind is 1/2 mass or 50% then were can the other 0.926% come from regards Graham Flowers MEng
@@narasimha3119 Yes Betz limit is a con from start to finish the wind pushes what it touches it can not push on the gaps between the blades regards Graham Flowers MEng
Very well made. Thank you!
Prof Sorenson,
Thanks for a great derivation of the Betz limit. However, I am struggling to understand something - In the control volume analysis slide, in the axial momentum balance, you have a term -mout*U0 representing the axial momentum of the air going out of the domain, ie the red top far-field boundary. I am guessing that the velocity here is (U0, v, 0) where v is a small y component, without which mout =0.
Sam
There is something wrong with Betz limit if kinetic energy in the wind is 1/2 mass or 50% then were can the other 0.926% come from regards Graham Flowers MEng
Can you send answers for week 5
@@narasimha3119 Yes Betz limit is a con from start to finish the wind pushes what it touches it can not push on the gaps between the blades regards Graham Flowers MEng
@@narasimha3119 HAVE YOU COMPLETED THE WEEK5, 6 ASSESMENT