Effect of a Turning Vane on Heat Transfer in Rotating Multipass Rectangular Smooth Channel

The effect of a hub turning vane on turbulent flow and heat transfer in a four-pass channel at high rotation numbers

“…Liou and Chen [15] measured the flow field and heat transfer in a rotating rectangular channel with an 180°sharp turn by LDV (Laser Doppler Velocimetry) and thermo-couples. Lei et al [16] studies the heat transfer of a U-bend connecting two rectangular passages with aspect ratio of 2:1. On all surfaces including leading, trailing and side walls of the turn region, heat transfer decreased with higher rotating speed.…”

“…In current study, heat transfer results are obtained as well as characteristic flow behaviors in the targeted serpentine channel (as in Ref. [16]) are resolved by CFD simulation. Rotation numbers cover the range of 0-0.4.…”

“…In the experimental work by Lei et al [16], a halfcircle-shaped turning vane was applied in the U-bend. The heat transfer phenomena in both stationary and rotating conditions were discussed in detail.…”

“…In some laboratory experiments [2,3,5,[7][8][9]16], high pressure air is used to achieve high rotation number and Reynolds number at the same time. The physical model and operating conditions of current simulation are very close to those used in the experiment [16]. The physical model is presented in Fig.…”

“…Mainstream flow is radial outward, inward, outward and inward respectively in 4 passages in sequence. Compared to the experiment [16], inlet and exit are extended to accommodate the uniformly specified velocity at both boundaries. To each passage, there are circumferentially 4 walls, named as, leading edge (LE), trailing edge (TE), and Dividers (or Side).…”