Heat transfer characteristics of piston-driven synthetic jet

被引：0

作者：

Jacob A. ^{[1
]}

Shafi K.A. ^{[1
]}

Roy K.E.R. ^{[1
]}

机构：

[1] Mechanical Engineering Department, TKM College of Engineering, Kollam

来源：

International Journal of Thermofluids | 2021年 / 11卷

关键词：

Frequency; Jet impingement; Nusselt number; Stroke length; Synthetic jet;

D O I：

10.1016/j.ijft.2021.100104

中图分类号：

学科分类号：

摘要：

This paper deals with numerical and experimental investigations on the heat transfer characteristics of a synthetic jet driven by a piston actuator. An experimental setup was designed and fabricated. Numerical studies were conducted using the finite volume-based commercial software ANSYS Fluent. The target surface is a copper plate with a heater placed underneath. Air is considered as a cooling medium. Effects of frequency of jet, the dimensionless distance between the orifice and target plate(Z/D), Reynolds number, orifice diameter and the number of orifices on the heat transfer characteristics are presented. Numerical results are in fair agreement with experimental results. The results indicate that the Z/D and jet frequency have a substantial impact on the heat transfer rate. In the frequency range considered the optimum value of Z/D is 8. It is found that with the increase of frequency, the average Nusselt number increases. For circular orifice and at high Z/D, the orifice diameter should be smaller for better heat transfer. When compared to single jet multiple jets have a higher heat transfer rate. Maximum and minimum values of normalized pressures (Pnr) are achieved for high actuation frequency and smaller areas of the orifice. © 2021 The Author(s)

引用

共 23 条

[1]

Zulkifli R., Sopian K., Effect of pulsating circular hot air jet frequencies on local and average nusselt number, Am. J. Eng. Appl. Sci. 1 Sci. Publ., pp. 57-61, (2004)

[2]

Zuckerman N., Lior N., Impingement heat transfer: correlations and numerical modeling, J. Heat Transf. Trans. ASME, 127, pp. 544-552, (2005)

[3]

Pavlova A., Amitay M., Electronic cooling using synthetic jet impingement, J. Heat Trans., 128, 9, pp. 897-907, (2006)

[4]

Crittenden T.M., Glezer A., A high speed, compressible synthetic jet, Phys. Fluids, 18, 1, pp. 017-107, (2006)

[5]

Clemens J.M., Lasance R.M., Synthetic jet cooling Part-I: overview of heat transfer and acoustics, IEEE Semi. Therm. Symp., pp. 20-25, (2008)

[6]

McGuinn A., Persoons T., Donovan T.S.O., Murray D.B., Heat transfer and air temperature measurements of impinging synthetic jet turbulence, Heat Mass. Transf., 6, (2009)

[7]

Chaudhari M., Puranik B., Agrawal A., Effect of orifice shape in synthetic jet based impingement cooling, Exp. Therm. Fluid Sci., 34, pp. 246-256, (2010)

[8]

Chaudhari M., Puranik B., Agrawal A., Heat transfer characteristics of synthetic jet impingement cooling, Int. J. Heat Mass. Transf., 53, 5-6, pp. 1057-1069, (2010)

[9]

Jain M., Puranik B., Agarwal A., A Numerical investigation of effects of cavity and orifice parameters on the characteristics of a synthetic jet flow, Sens. Actuators A Phys., 165, pp. 351-366, (2010)

[10]

Chaudhari M., Puranik B., Agrawal A., Multiple orifice synthetic jet for improvement in impingement heat transfer, Int. J. Heat Mass. Transf., 54, 9, pp. 2056-2065, (2011)

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