# Oscillating airfoil at 0.25 of chord length

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October 14, 2017, 12:07
Oscillating airfoil at 0.25 of chord length
#1
New Member

musab
Join Date: Oct 2017
Posts: 11
Rep Power: 7
Hello Everyone,
I need help...My case is a 3D Problem with an airfoil. I want to oscillate the airfoil at 1/4 th (i.e at 0.25 meter)of the chord length.

The total length of an airfoil is 1 meter.
My airfoil is oscillating correctly but about leading edge tip that is at chord length of 0 meter and i want it to oscillate at 0.25 meter.
Please have a look at the attached snap and short recorded video link below for better understanding of the problem.

Further, My UDF looks like as below:

#include "udf.h"

DEFINE_CG_MOTION(oscillating_airfoil, dt, vel, omega, time, dtime)
{
real a, w, pi;

pi = 3.14159265;
/* define motion variables */

a = pi/12; /* Oscillating Amplitude 15 degrees */
w = 2 * pi *1; /* Angular Frequency 1Hz */

/* define airfoil motion */

omega[2] = -a*sin(w*time); /* z-component of angular velocity */

}

So i want to oscillate exactly as in the video link below
https://youtu.be/LPZdES4Vyws

Hope to hear from anyone soon.
Thanks!
Attached Images
 image.jpg (88.2 KB, 17 views)

 October 14, 2017, 20:50 #2 New Member   musab Join Date: Oct 2017 Posts: 11 Rep Power: 7 If any one have some idea please reply to my above post. Thanks!

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