# Moment coefficient of moving airfoil

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 October 26, 2018, 09:04 Moment coefficient of moving airfoil #1 New Member   Join Date: Oct 2018 Posts: 1 Rep Power: 0 Hi, I'm modelling an airfoil undergoing sinusoidal pitching and plunging motion, using tabulated6DOF motion. I have a centre of rotation of my airfoil (x = chord length/3) and would like to calculate the moment around this point for the duration of my simulation. However, in the 'ForceCoeffs' file, I can only specify a single point for the Centre of Rotation (CoR). My centre of rotation will be moving up and down with the airfoil so the moment coefficients I get are around the wrong (fixed) point. I can see two ways to solve this: 1) Being able to specify my centre of rotation as moving or 2) Being able to find the aerodynamic centre of the airfoil throughout its motion. I can then use the lift and drag forces in a moment equation to find the moment around my (x = chord length/3) point. Does anyone know how to do these? Thanks, Calum

May 10, 2020, 12:27
How to calculate Moment coefficient of moving airfoil ?
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Maqusud
Join Date: May 2020
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Quote:
 Originally Posted by cpark Hi, I'm modelling an airfoil undergoing sinusoidal pitching and plunging motion, using tabulated6DOF motion. I have a centre of rotation of my airfoil (x = chord length/3) and would like to calculate the moment around this point for the duration of my simulation. However, in the 'ForceCoeffs' file, I can only specify a single point for the Centre of Rotation (CoR). My centre of rotation will be moving up and down with the airfoil so the moment coefficients I get are around the wrong (fixed) point. I can see two ways to solve this: 1) Being able to specify my centre of rotation as moving or 2) Being able to find the aerodynamic centre of the airfoil throughout its motion. I can then use the lift and drag forces in a moment equation to find the moment around my (x = chord length/3) point. Does anyone know how to do these? Thanks, Calum

Hi sir,
I am facing the same problem. did you find any solution?

 Tags aerodynamic center, airfoil, cor, rotation