Heat transfer local distributions in rotating multipass channels with bleed

An experiment was conducted to better understand the effects of rotation, sharp turns, channel geometry, and rib turbulators on the heat transfer distributions in cooling serpentine passages in modern gas turbine blades. Results are obtained for rotating two-pass square channels with smooth walls and with 90 and 60 ribs of various sizes on the leading and trailing walls. Reynolds number ranged from 5,500 to 14,500 and rotation number is varied up to 0.24. Attention is focused on the sole effect of rotational Coriolis forces under zero buoyancy and isothermal wall conditions, and its coupling with the effects of turn-induced and rib-induced secondary flows.

Heat transfer local distributions in rotating multipass channels with bleed Conference Paper