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-   -   [GAMBIT] Multi element airfoil (http://www.cfd-online.com/Forums/ansys-meshing/114185-multi-element-airfoil.html)

RAMSTECH March 6, 2013 15:32

Multi element airfoil
 
Can anyone help me ..

I want to build a geometry of a airfoil with flap, mesh it Gambit and analyze it with Fluent. can i get direct co-ordinates of such case so that i can change the angle of flap only with respect to airfoil keeping angle of attack constant? if it is possible pls tell me the details..

Thank u ...

-mAx- March 7, 2013 03:12

do you mean with moving mesh?

RAMSTECH March 7, 2013 05:14

For fixed mesh only
 
for fixed mesh only.. i would like to compare results of an airfoil with different flaps.(for example NACA4412 airfoil with NACA 4412 flap , and NACA 4412 airfoil with NACA 23015 flap) please tell me how should i proceed forward.

ThanQ for the replies

-mAx- March 7, 2013 06:13

-Create your outer domain
-Create your multi element airfoil.
-save this dbs
>> save this session with another name
Now you can go and substract airfoils domain from outer domain
Finally mesh

For other flap incidence, load the other dbs, rotate your flap, substract, etc...

it is just a copy paste...........

RAMSTECH March 12, 2013 02:33

how to create it
 
ThankQ for ur reply Mr.Max

but sir, my problem is that i am not getting how to create multi-element airfoil. pls help me. thankQ

-mAx- March 12, 2013 02:44

you need first to get airfoil geometries

RAMSTECH March 12, 2013 03:02

How can i get
 
but sir, how can i get that airfoil geometries?
if any tutorial is there ( for air foil with flap), can u please send me.
my mail id is nallavelliramesh@gmail.com
thankQ for the reply

-mAx- March 12, 2013 04:19

no idea, since you are looking for geometry data-
But google may help you

RAMSTECH April 25, 2013 14:24

finally i did meshing for the airfoil with a flap , now i imported it into fluent
, ( i am attaching the mesh image here under).
now i gave pressure far field for all the boundaries . i gave mach number 0.2
i am using RNG k-epsilon turbulent model to solve it. i gave option to plot and write Cd and Cl ( co.efficient of lift and drag).

when i solve with the above options i am getting error like
read-data: invalid plot file format


Checking existing force monitor file cd-history...
Error: read-data: invalid plot file format
Error Object: *eof*


can u pls help.

why iam getting those error

Thank u

-mAx- April 26, 2013 01:09

the problem may be on data files you want to write.
Check path, permissions, etc....

wanfuhh May 3, 2013 12:35

Quote:

Originally Posted by RAMSTECH (Post 423191)
finally i did meshing for the airfoil with a flap , now i imported it into fluent
, ( i am attaching the mesh image here under).
now i gave pressure far field for all the boundaries . i gave mach number 0.2
i am using RNG k-epsilon turbulent model to solve it. i gave option to plot and write Cd and Cl ( co.efficient of lift and drag).

when i solve with the above options i am getting error like
read-data: invalid plot file format


Checking existing force monitor file cd-history...
Error: read-data: invalid plot file format
Error Object: *eof*


can u pls help.

why iam getting those error

Thank u

Im doing the same Multi Element Airfoil analysis of STOL CH750 aircraft but I am having problems in meshing. Can you help me?

Im The BAWSE May 21, 2013 22:48

Quote:

Originally Posted by wanfuhh (Post 425045)
Im doing the same Multi Element Airfoil analysis of STOL CH750 aircraft but I am having problems in meshing. Can you help me?

I can help you yoda. i got the details

give me ya emails

wanfuhh May 21, 2013 22:53

Quote:

Originally Posted by Im The BAWSE (Post 429066)
I can help you yoda. i got the details

give me ya emails

i would be very glad to have the details. here's my email.. wansyahmi17@gmail.com. thanks in advance!

Im The BAWSE May 21, 2013 23:06

Quote:

Originally Posted by wanfuhh (Post 429069)
i would be very glad to have the details. here's my email.. wansyahmi17@gmail.com. thanks in advance!

I cant send u any email but perhaps i can send u the image of steps on how it works. u got fb cause it makes my work easier. what u'd say?


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