Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

His experiments in air duct flow measurements, which previously delved into ultrasonic flow measurement, led him to try mechanical means. That calls for some kind of turbine producing a signal ...

Subsonic Flow Through an Adiabatic Duct: Subsonic airflow accelerates through an adiabatic duct with a given friction factor until it reaches a Mach number of unity. The objective is to compute the ...

Consider the steady, flow of a constant density fluid in a converging duct, without losses due to friction (figure 14 ... measuring the difference between the pressure sensed by the Pitot tube and the ...