I would claim that the pulsation actions of the exhaust have a cooling affect. As such there is no reason that the teams to not have accurate test data of exhaust temps at various distances from the exhaust tip. Both CFD and wind tunnel activities could be made to correlate with these measurements.Just_a_fan wrote:Ringo, does the CFD system accurately model the pulse nature of exhaust gases? Or does it make the, not unreasonable in light of the computational limitations, assumption that the gas flow is uniform over time and across the flow regime?
I'd bet that even the wind tunnel model, whilst using heated flow to represent the exhaust, doesn't include the pulse nature of the flow. These little things can have a disproportionate affect on the outcome.
Take away from the sim what you wish. It is all we have at this point and do not plan on a lot more being made available.
Brian