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Atit May 3, 2007 08:30

BladeGen documents
 
Dear all, I am learning to use CFX to solve the flow across the wind turbine. With the softwares I have, I decided to use BladeGen to construct the geometry, then use TurboGrid to generate grid, and use CFX to solve the flow. However now I stucked with BladeGen. I have problems to understand BladeGen's help files. Do you have any suggestion? Thank you very much for your kind consideration.

Atit

Dip May 3, 2007 14:13

Re: BladeGen documents
 
I am also trying do so on a centrifugal compressor. I also got stuck and don't have the help files installed for some reason. My problem is to analyse the rotor-stator interaction. I could not sucessfully create the rotor and stator. But, suppose I can create them, I am not able to understand, how do I integate the rotor (or rotor mesh) and stator( or stator mesh)? Does it need to be done in BladeGen or in TurboGrid.? If possible please forward the help files to my e-mail address, I will try to see if I can make something out of it.

Thanks, Dip

Johnny May 5, 2007 07:02

Re: BladeGen documents
 
The BladeGen help documentation is terrible. If you are stuck you are not likely to get an answer though the help doc.

Johnny May 5, 2007 07:03

Re: BladeGen documents
 
BladeGen creates the geometry, TurboGrid meshes the geometry. You cannot create multiple stages in BladeGen. Create your rotor and stator geometries and meshes separately, and import the meshes separately into CFX Pre.

deLuther May 5, 2007 10:13

Re: BladeGen documents
 
Yes, BladeGen documentation is not good, but it is usable. The only additional documentation was presentation in german... that I saw one time. But I had training... But most infomation I got from help.

Pankaj May 6, 2007 01:20

BladeGen documents
 
Bladegen uses the theory from a chinese scintist to define the Blades meridional profile and other profiles.First u must have some knowledge about the blade profiles,aerofoil shapes,search on net for this.Then bladegen have some example files in the root directory,refer their profiles. Convert your xyz cordinates to rtz cordinates.use rz in meridional profile and theta in angle definitions,play with it and observe the changes in 3D profile,can give u some clues.

Atit May 6, 2007 12:54

Re: BladeGen documents
 
To try using BladeGen, I have three questions as follows:

1. I'd like to verify my modeling ability by simulating the NREL Phase II wind turbine which I have the experimental results, but I do not understand some terms. In the 'Basic Machine Parameters' section, it specifies that ================================

- Type of rotor: fixed

- Tilt: 1 degree (blade pitch angle was calibrated assuming 0 degree tilt)

- Cone angle: 3.417 angle ================================ My first question is what this 'tilt' mean? and what is the 'fixed rotor'?

2.In BladeGen, what do 'M-Prime', 'Theta-Prime', 'Blade Lean Angle', and 'Beta' mean?

3. The blade pitch is set to 12 degree. In BladeGen, what is this? Theta or Beta?

Thank you very much for your consideration

Pankaj May 6, 2007 23:59

Re: BladeGen documents
 
Mr.Atit,What u want is very specific. But as concerned to Bladegen,all the definitions are for the Meridional Profile i.e from leading edge of a Blade to its trailing edge following the root of meanline(Centreline)where % M is Meridional fraction,simillarly in help glossary u will find what is M-prime or other things,these r all blade related definitions,u can search them in any aerofoil or turbine related books.About theta-which is one of the cordinate of r-theta-z cordinate system,which is square root of x2+y2,2is for square.Beta is Blade angle,right click in angle definition,go to angle definition and u can change it.

ahmad786 September 27, 2013 21:42

Can any one tell me how I can change Blade pitch of axial flow turbine in BLADGEN.I searched alot but failed to get answer.PLZ HELP.

umairrasheed99 April 21, 2015 09:14

anyone can tell me how to determine the Leading wedge angle or Trailing wedge angle of turbine blade in Ansys Bladegen or any relation plz share with me.

ashwani.thakur February 23, 2016 07:41

Hi Guys,
Can anyone share the help files or tutorials of blade gen Please....

When I try to open the help files in blage gen, it says "Failed to launch help" and opens a Microsoft support page, which again does not solve the issue".
Any help will be highly appreciated.

Thank You.

Email id: ashwani.thakur321@gmail.com

turbo February 23, 2016 11:30

Ansys BladeGen (previously CFX-BladeGenPlus) is quite self-explanatory. Ask whatever you want to know.

StephanHoetzl February 26, 2016 07:38

I have created stator blades (guide vanes) for an axial turbine and so far everything looks fine. Turbogrid produces a nice mesh.

In the next step I would like to create meshes with different opening angles of the guide vanes. They will be adjustable in the actual turbine aswell.

When I use the "setup blade rotation" and "rotate blades about Axes" tools I can achieve what I want, but unfortunately the blade profile gets distorted.

Is there anything I can do about that?

turbo February 26, 2016 08:12

Advanced question.
I do have some doubt about the function though I did not check the rotated blade geometry in details. From my visual check, it looked OK in my case of a symmetrical inlet guide vane. Upstream and downstream flowpath look curved, but in Turbogrid they turned out normal. From 90 deg down to 20 deg opening, I had no big issues.

If you see some issues in your stator, I would export the meanline file (.rtzt) to be imported into a small custom program (fortran). Rotaing xyz coordinates are easy to build in your program, and then spits out the new .rtzt for BG to import again.

ashwani.thakur February 26, 2016 10:01

Can anyone suggest some good resource to learn about the various geometric planes (like meridonial and blade to blade plane) and other views that are presented in the Blade gen. I am just starting blade gen and does not have any basic understanding of the geometry of blades.
Thanks.

turbo February 26, 2016 10:20

Quote:

Originally Posted by ashwani.thakur (Post 587012)
Can anyone suggest some good resource to learn about the various geometric planes (like meridonial and blade to blade plane) and other views that are presented in the Blade gen. I am just starting blade gen and does not have any basic understanding of the geometry of blades.
Thanks.

You will need to study the fundamental of turbomachinery text books.

ashwani.thakur April 2, 2016 06:18

Quote:

Originally Posted by turbo (Post 586489)
Ansys BladeGen (previously CFX-BladeGenPlus) is quite self-explanatory. Ask whatever you want to know.


Can any one guide me as to how calculate the Warp angle(theta) and flow angles(beta) at LE and TE from the airfoil data points or shape calculated through CMM. As I need to enter these angle values in BladeGen.

Thanks.

turbo April 3, 2016 21:37

Theta = theta in the cylindrical coordinate system
Flow angle is not to be mentioned here. It should be Blade angle.
Blade angle (Beta) is the angle defined on the m-(r*theta) plane. As I said, you will need to read turbomachinery introduction books.

mohsenrahmani May 18, 2016 03:48

Bladegen export
 
does anyone know when we export Turbogrid file from bladegen the points of profile.curv is xyz or rtz?


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