The total drag coefficient is the sum of the wave-drag coefficient cd,w and the friction-drag coefficient cd,0. This is a statement that describes the total drag or resistance of a body moving at supersonic or hypersonic speeds in a fluid environment, such as air or water. The wave-drag coefficient cd,w is the drag due to shock waves on the body surface, and it depends on the shape, size, and angle of attack of the body, as well as the Mach number and the properties of the flow. The friction-drag coefficient cd,0 is the drag due to the viscous shear stress on the body surface, and it depends on the Reynolds number and the boundary layer characteristics of the flow. The total drag coefficient can be used in the drag equation to calculate the drag force on the body with a given density, velocity, and reference area.Â
- Total drag coefficient (cd)
- Wave-drag coefficient (cd,w)
- Friction-drag coefficient (cd,0)