A numerical investigation is performed to explore the 3D unsteady flow features and heat transfer performance induced by dual vertically-oriented piezoelectric fans in the presence of cross flow. The numerical simulations are conducted by using dynamic meshing scheme in combination with the periodic movement law of the displacement of the vibrating fan. The vortical and thermal features with dual piezoelectric fans are obtained for two dual fans arrangements (face-to-face and edge-to-edge) at in-phase and out-of-phase vibrating conditions. The results show that the vibrating phase of dual fans has an obvious influence on convective heat transfer performance. For the dual fans arranged in the face-to-face mode, the convective heat transfer downstream the fan-tip vibration envelope under the out-of-phase situation is higher than that under the in-phase situation. For the dual fans arranged in the edge-to-edge mode, the convective heat transfer in the region between two adjacent fans under the out-of-phase situation is significantly less than that under the in-phase situation.
LI Xinjun
,
ZHANG Jingzhou
,
TAN Xiaoming
. Characteristics of heat transfer with dual piezoelectric fans in presence of cross flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018
, 39(1)
: 121424
-121424
.
DOI: 10.7527/S1000-6893.2017.121424
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