Question

Anyone know how to calculate the drag coefficient if I don't have any information on drag? I know it's a function of Reynolds and Mach but don't know the equation...

Answer 1

first u have to use the control volume and the conservation of linear momentum.
The change of the momentum is basically the drag force.After u calculate the drag force foreaxmple =(1/3)(density)(velocity2)(lengthx breadth).Here 1/3 is the drag coefficient

Answer 2

hope this helps-U can refer to Frank M white book chapter 3 for understanding this