active flow control

Does anybody know if active flow control is being considered or studied under any active contract by NREL

Hello,

Our partners at Sandia have a contract with Case van Dam at the University of California Davis to look at MEMS microtabs near the trailing edge of aifoils. Although, I believe this work is now finished. There has also been some recent work out of Georgia Tech by Tongchitpakdee, but I don’t believe we are supporting it.

Often the tradeoff of active flow control is the benefit vs. complexity and power consumed. To date, no commerical turbine has been sold using flow control, but perhaps the right technology has yet to arrive.

What is your interest?

cheers,
Pat

afc99,

Like Pat mentioned previously, Sandia has a research effort around active control for WT blades. We currently have a contract with UCDavis to investigate the benefits of active control using Microtabs. In addition to that work, I am investigating other potential devices. If you are interested in discussing some of the work, feel free to e-mail me.
jrzayas@sandia.gov

Dear Mr. Zayas,

My name is Hernán Ochoa and i’m currently studying a Master degree in CIDESI Queretaro, México. I’ve been using FAST8 codes to simulate torque control and pitch control systems for the NREL’s WP 1.5 MW turbine. I was trying to figure out how to implement microtabs within the FAST code and i barerly found information about it.
Would you help me out with this problem?

In Wilson’s paper named “ACTIVE AERODYNAMIC BLADE CONTROL DESIGN FOR LOAD REDUCTION ON LARGE WIND TURBINES”, this control is implemented.

microtabs.png

  • how is this input enabled?
  • What is the configuration that need to be made within FAST code?

I would really appreciate you to help me out with this information.

Best regards,

Dear Hernan,

The ability to specify MulTabLoc within Simulink is not a standard feature of the FAST v8 interface to MATLAB/Simulink. You will have to customize the FAST source code to achieve this. The following forum topics may help a bit:

http://forums.nrel.gov/t/variable-airfoils-using-the-multabloc-user-function/1006/12
http://forums.nrel.gov/t/movable-trailing-edge-flaps-implementation/858/5

Best regards,