Search found 28 matches

by Pat.Moriarty
Fri Mar 31, 2006 9:51 am
Forum: Airfoils
Topic: Data for NREL Airfoils
Replies: 19
Views: 37392

Re: Somers, Dan M.: The S801 through S808 Airfoils

According to our librarian that report was never published, so your best option is to contact Dan Somers directly - noboby here as a copy, sorry.
by Pat.Moriarty
Wed Feb 22, 2006 11:08 am
Forum: Computer-Aided Engineering Software Tools
Topic: How can we download AeroDyn, FAST and other design codes?
Replies: 4
Views: 9597

Hi Zhou, There are no restrictions on dowloading codes, just know that first priority for support of using them goes to the US industry. So, you can't always be guarenteed your questions will be answered, but we'll try our best. The code, source code and executable, are located in the self-extractin...
by Pat.Moriarty
Wed Feb 22, 2006 11:01 am
Forum: Structural Analysis
Topic: Wind speed for fatigue preliminary dimensioning
Replies: 2
Views: 46918

Fatigue simplification

Hi Claudio, I've thought about doing this before, but never have been able figure it out. I haven't found anything in the literature, although that doesn't mean that it doesn't exist or isn't possible. I think one large problem is that fatigue is very much design dependent: sometimes a design is dri...
by Pat.Moriarty
Fri Feb 10, 2006 9:14 am
Forum: Airfoils
Topic: Data for NREL Airfoils
Replies: 19
Views: 37392

NREL Airfoils

Just to corret my earlier post above - after checking the NREL publications page, a lot of the NREL airfoils ARE publicly available now. Seems many were published in January 2005. Perhaps the patent ran out (?), so I'm not exactly sure if the licencing fee still applies. Happy airfoil hunting.
by Pat.Moriarty
Thu Feb 09, 2006 10:19 am
Forum: Airfoils
Topic: Data for NREL Airfoils
Replies: 19
Views: 37392

Airfoils

Unfortunately, I don't have that list but Dan Sommers has a partial list http://www.airfoils.com/pubs1.htm to find out if they are publicly available try searching http://www.nrel.gov/publications/ or some of the older ones are available here http://www.osti.gov/bridge/ If anyone would like to post ...
by Pat.Moriarty
Thu Feb 09, 2006 9:47 am
Forum: Testing
Topic: Wind tunnel test of wind turbine ?
Replies: 6
Views: 14193

S809

Zhou,

the coordiantes for the s809 are available in the following

http://www.osti.gov/bridge/servlets/pur ... 437668.pdf

or

http://wind.nrel.gov/amestest/MachineData.pdf

cheers,
Pat
by Pat.Moriarty
Thu Jan 26, 2006 2:02 pm
Forum: Inflow Turbulence
Topic: Using full-field turbulence files.
Replies: 9
Views: 17199

grid spacing

I guess it really depends on how far outside the field the turbine is going to move. If the distance is large, I'd propose having the possibility of variable spacing. It seems that by adding tower points to the wind field (is this still being proposed?), we are kind of doing this anyway. This is wha...
by Pat.Moriarty
Thu Jan 26, 2006 1:19 pm
Forum: Testing
Topic: Wind tunnel test of wind turbine ?
Replies: 6
Views: 14193

CFD validation

Zhou, I think that most people would agree that matching Reynolds number is important for validating CFD codes, particularly when there is such a large range along the blade of a typical turbine. My suggestion is to try to get access to data that covers the range that you are interested in for valid...
by Pat.Moriarty
Thu Jan 26, 2006 12:51 pm
Forum: Rotor Aerodynamics
Topic: active flow control
Replies: 4
Views: 12078

active flow control

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 be...
by Pat.Moriarty
Mon Jan 23, 2006 5:40 pm
Forum: Rotor Aerodynamics
Topic: AeroDyn Feedback
Replies: 3
Views: 8554

pitch rates in AeroDyn

Hi Julian, The quick answer is: pitch rates are not a direct input into AeroDyn. But, in the dynamic stall routines (is this what you mean by dynamic inflow? If not see below.) the rate of change of angle of attack is calculated between time steps. This will be affected by the blade motion (includin...
by Pat.Moriarty
Tue Dec 13, 2005 5:22 pm
Forum: Computer-Aided Engineering Software Tools
Topic: FAST Linearization
Replies: 20
Views: 14918

Brrr...looks cold there - I thought you were from Florida?
by Pat.Moriarty
Tue Nov 15, 2005 1:50 pm
Forum: Airfoils
Topic: Data for NREL Airfoils
Replies: 19
Views: 37392

NREL series airfoils

Hi Claudio, Unfortunately, NREL licences the airfoil coordinates to interested manufacturers and therefore they are not publicly available. The exception to this is the S809 airfoil, which can be found in reports related to the NASA Ames wind tunnel experiment. These reports can be found on the NREL...
by Pat.Moriarty
Fri Nov 11, 2005 3:58 pm
Forum: Rotor Aerodynamics
Topic: AeroDyn Feedback
Replies: 3
Views: 8554

AeroDyn Feedback

We are currently going through a massive rewrite of the AeroDyn code and would like some feedback on how to best improve it. What do you like? what do you hate?...etc, etc... Please feel free to comment on documentation and usability issues as well.

cheers,
Pat

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