Help for DBEMT subroutine of Aerodyn program

Hello Jonkman,

I am so sorry to bother you, but I hope to get some help from you.
I am reading the Aerodyn program recently, and I don’t know what the equations are used in the DBEMT subroutine, for example the ones in pictures.Could you give me some suggestions for reference.By the way, the program version I am reading is OpenFAST V2.3.0.

Best regards

Dear Long.Gao,

The equation numbers referenced in the DBEMT source code refer to a DBEMT implementation plan that was never published. However, the dynamic wake model of Øye is presented in the following papers:

H. Snel and J. G. Schepers. Joint investigation of dynamic inflow effects and implementation of an engineering method. Technical report, ECN-C-94-107, Energy Research Centre of the Netherlands, Petten, 1995.
M. O. L. Hansen. Aerodynamics of Wind Turbines - Second Edition. Earthscan, London, Sterling, VA, 2008.

Best regards,

Dear Jonkman

Your response was very helpful.Thank you very much for your prompt reply.

Beast regards