PITOT-STATIC TUBE OR PITOT TUBE FOR MEASURING FLOW RATES ?

摘要

Where volume flow rates in ventilationapplications are to be measured common practise is tointegrate the velocity profile over the entire cross-section.One of the instruments used to carry out the flow velocitytraverse is the Pitot-static tube. The paper examines, on anexperimental basis, whether the readings of both total andstatic pressure by a Pitot-static tube could not validly becarried out by a combination of a Pitot tube that measuresthe total pressure and tappings at the wall of the duct wherethe static pressure is picked up. The advantage becomesparticularly interesting for applications where the flow ratemay change in time.