effect on Flow and pressure measuring due to turbulent flow of air Hi, I want to measure the air flow rate using a device which will basically measure the velocity of air and converts that in terms of flow rate reading. For creating flow of air i have used vacuum pumps which is connected by using the L connector and T connectors with the tubings. In this test, i am worried about the turbulent flow in the L connector and T connectors , which can effecting in flow measurement because measurement of flow rate in terms of velocity. What i exactly wanted to know is whether turbulent flow effects the mass flow measurement? if yes, how to reduce the turbulence effect? Thanks in advance for the answers.