The Challenges in Measuring Air Mass Flow Rate inside a Gas Turbine Duct
As opposed to gas and oil industries, where gases and fluids flow in round, symmetrical pipes, inlet air flows into the gas turbines through sometimes rather short, irregular inlet ducts. As a result, the flow does not become fully developed within the duct, and the flow distribution is irregular and does not show a pattern. Because of these complexities, a pitot tube approach is not a viable option for measuring inlet flow rate. Other approaches are also ineffective, and would cause significant pressure drop that decrease the efficiency of the compressor.