I have an engine air mass flow rate (322 kg/s) which I would like to convert to a corrected mass flow rate at 10000 feet.

I have tried using the equation found here. However, this article lacks any sources and I have struggled to find any other reliable sources online.

I have made an attempt using the equation in the article but have gotten a greater mass flow than 322, which doesn't make sense.

Is the equation in the article correct or am I just calculating this wrong?

For 10000 ft I get:

Temperature 268K Pressure 69.6817 KPa

So Theta = 0.9301 and Delta = 0.6877

Which gives a corrected mass flow of 451 kg/s.


The equations on Wikipedia are correct (see Flack, for example). I believe your error is in their interpretation. You say that you are given a mass flow rate and want to "convert [it] to a corrected mass flow rate at 10000 feet." But the direction you take the equations is as if you have a mass flow rate at 10000 feet and want to convert it to the mass flow at sea level. If the latter is what you intended, then I see no error. If the former, you need to invert the equation.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.