I have made a theory to calculate a coefficient of drag based on Cd for a 2d plate. I will refer to the coefficient of drag for a 2d plate as just D. Lets say that we had a 2d plate and it was tilted at an angle θ from the axis orthogonal to the direction of velocity. Then the drag coefficient would be Dcosθ. Now lets say it was not 1, but 2 plates and they are connected at the edges. Now you have 2 angles, θ1 and θ2. If θ1=θ2, then it is still Dcosθ, but if θ1#θ2, then you need to find the average angle, or (θ1+θ2)/2 and so it is Dcos(1/2(θ1+θ2)) In fact, you can do this with a shape with any number of sides, you just need to find the average angle θavg,and just find the cosine of that angle and then multiply by D. So we can just write it as Cd=Dcos((Σθ)/n), where n is the number of angles, except that you don't include angles greater then 90.
What do you think?
What do you think?
