TY - GEN
T1 - Characteristics of small-scale synthetic jets - Numerical investigation
AU - Tang, Hui
AU - Zhong, Shan
PY - 2008/12/1
Y1 - 2008/12/1
N2 - In synthetic jet actuators with an orifice diameter typically less than 1 mm (termed as small-scale synthetic jet actuators), the compressibility and viscosity effects often become significant causing them behave differently from large-scale synthetic jets. In this paper, a numerical study of the synthetic jet from an orifice diameter of 0.5 mm is undertaken and the results are compared with the synthetic jet from an orifice diameter of 5 mm. The results reveal that, given the same dimensionless parameters L and ReL, the appearance and circulation of vortex rings produced from synthetic jets of different scales are identical in the near field. It is also found that although the linear relationships between (L and ReL) and actuator operating conditions observed for large-scale synthetic jets are no longer valid for small-scale synthetic jets, the linear relationships between the dimensionless jet performance parameters and (L and ReL) still exist. This finding is very useful to support the development of low-dimensional predictions models.
AB - In synthetic jet actuators with an orifice diameter typically less than 1 mm (termed as small-scale synthetic jet actuators), the compressibility and viscosity effects often become significant causing them behave differently from large-scale synthetic jets. In this paper, a numerical study of the synthetic jet from an orifice diameter of 0.5 mm is undertaken and the results are compared with the synthetic jet from an orifice diameter of 5 mm. The results reveal that, given the same dimensionless parameters L and ReL, the appearance and circulation of vortex rings produced from synthetic jets of different scales are identical in the near field. It is also found that although the linear relationships between (L and ReL) and actuator operating conditions observed for large-scale synthetic jets are no longer valid for small-scale synthetic jets, the linear relationships between the dimensionless jet performance parameters and (L and ReL) still exist. This finding is very useful to support the development of low-dimensional predictions models.
KW - CFD simulation
KW - Synthetic jet
UR - http://www.scopus.com/inward/record.url?scp=84861081887&partnerID=8YFLogxK
U2 - 10.1007/978-1-4020-6858-4_15
DO - 10.1007/978-1-4020-6858-4_15
M3 - Conference article published in proceeding or book
SN - 9781402068577
T3 - Solid Mechanics and its Applications
SP - 135
EP - 140
BT - IUTAM Symposium on Flow Control and MEMS - Proceedings of the IUTAM Symposium
T2 - IUTAM Symposium on Flow Control and MEMS
Y2 - 19 September 2006 through 22 September 2006
ER -