Jet-array impingement heat transfer in a concentric annular channel with rotating inner cylinder

摘要: Abstract As a new cooling scheme for electric rotor machines, the impinging jets issued from armature onto stator with spent flows directed toward two annular exits at both ends can convect Joule heat out of machinery effectively. An experimental study is accordingly devised to investigate transfer performances over outer cylinder concentric annulus an jet-array rotating inner cylinder. Intermittencies and in Taylor–Couette–Poiseuille flow feature dominant physics that affect performances. A set selected data illustrates isolated interdependent influences jet Reynolds number ( Re ), Taylor Ta ) Grashof Gr ω on local area-averaged Nusselt numbers Nu ¯ ). With present parametric conditions examined, coupled , effects have led ratios rotational non-rotational range 0.75–1.48. In conformity experimentally revealed physics, correlation permits evaluation subject impingement generated.