Static or dynamic pressures in duct

[Jonny6001]

Hello, I have a little question regarding airflow.

You have an object in a wind-tunnel, which has a dynamic pressure of 1000Pa and say static pressure of 99000Pa.

If the object has a duct with static and total pressure probes, to maximise airflow through that duct, would you be looking for the highest or lowest dynamic pressure?

The way I approach it is, if the dynamic pressure is high the it will cause low static pressure which has the effect of trying to "suck" air though the duct. So a high dynamic pressure in the duct will maximize airflow. Do you guys agree with this?

Just as an aside, the duct is not exactly in-line with the air flow direction.

 

[anorlunda]

ping @Chestermiller . Help needed, spring cleaning.

 

[Chestermiller]

ping @Chestermiller . Help needed, spring cleaning.

Sorry. I really don't understand what this member is asking. Maybe @boneh3ad can help.

 

[boneh3ad]

1) This is from February 2010, so... um...

2) This is incredibly hard to parse without some kind of drawing or at least a better written description.

3) The short answer is that for any duct, for a given total pressure, incompressible air flow will be maximized when you raise the dynamic pressure because, literally, that amounts to raising the velocity of the flow. I have no idea how this relates to the broader question.