Hey guys, long time reader first time poster. I'm undertaking a project in partial fulfillment of my Mechanical Engineering degree with regards to the cooling of an intercooler heat exchanger with an exterior water spray. basically i have an intercooler and i am using a hair dryer to supply a flow rate and heat input through the inside of the exchanger. One of the things i'm really stuck on is how to measure the flow rate of air internally through the exchanger. I could probably find out from the data sheets of the hair dryer but i dont think these would not representative of the real flow rate as the downstream effects will reduce the flow rate. i have been looking at mass air flow meters but cant seem to find any useful information as to how to correlate their voltage readings with a flow rate. I am aware there is graphs for some of these online but id need an accurate reading and any mass air flow meters i have seen for automotive applications do not come with a graph, or do they? ive looked into using the pressure difference from a venturi setup but not sure which way is best to go with or if there are any other methods i am overlooking?