but the volume of air traveling at the speed you are stating is misrepresented is negligible compared to the volume of air properly represented!!! The effect on terms of the calorimetry is negligible!!!!
Are you sure?
The peak velocity is (normally) in the center, and the lowest flow is at the edge.
The velocity directly affects the volume calculation, from which all output is derived.
So what effect on power output is represented by a 10% overestimate of velocity? How does that scale with temperature?