BobbyP27 t1_irsbpb4 wrote on October 10, 2022 at 5:41 PM

Reply to comment by Wizatek in TIL that passenger jet engines produce most of their thrust from fan at the front, not from the jet exhaust, and that this is called a high-bypass engine. by Rilot

Because density plays a role in Reynolds number, for smaller engines at high altitude (low air density), you can't always count on the flow being turbulent. Laminar flow and transition to turbulence are significant design issues for things like business jet size engine compressors.