goarnaut and CliveL, you two gentlemen seem to have the background to be able to answer this question. Many assert that airflow through a turbine engine may reach and/or exceed sonic conditions with respect to the rotating components. I would have thought that unlikely, what with shock waves bouncing around inside the rotating bits. Would it be safe to assume that the temperature rise as the air passes through keeps the airflow subsonic?
Many Thanks.
Last edited by Brian Abraham; 28th Nov 2012 at 01:38.