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This came up in the barometric pressure thread in college HW help, and I asserted that R/MW was "new" to me --- "no excuse, sir --- tell me when you're tired, sir --- one, sir --- two, sir --- ... one thousand and one, sir ..."
Okay, rummage around in Eshbach and there it is, in the context of flow through a jet engine --- makes sense in that instance, no fixed average MW for the process stream --- the chemist in me would have run just "bar" MW as a variable rather than R/MW, but, no big deal.
enigma states that R is seldom used without division by MW in the aero curriculum --- who, what, where, when, how did that get started? An rms v2/K might be useful for analyses of air flow, I suppose, but MW isn't changing that much, or is there actually dissociation going on in shockwaves around airfoils?
Okay, rummage around in Eshbach and there it is, in the context of flow through a jet engine --- makes sense in that instance, no fixed average MW for the process stream --- the chemist in me would have run just "bar" MW as a variable rather than R/MW, but, no big deal.
enigma states that R is seldom used without division by MW in the aero curriculum --- who, what, where, when, how did that get started? An rms v2/K might be useful for analyses of air flow, I suppose, but MW isn't changing that much, or is there actually dissociation going on in shockwaves around airfoils?