Cooling performance improvement of impingement hybrid synthetic jets in a confined space with the aid of a fluid diode

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Cooling performance improvement of impingement hybrid synthetic jets in a confined space with the aid of a fluid diode. / Yu, Qinghua; Mei, Ziyue; Bai, Mengqi; Xie, Danmei; Ding, Yulong; Li, Yongliang.

In: Applied Thermal Engineering, Vol. 157, 113749, 05.07.2019.

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@article{4845ead1ad6c463d9e8f059f666d39b4,
title = "Cooling performance improvement of impingement hybrid synthetic jets in a confined space with the aid of a fluid diode",
abstract = "For the conventional synthetic jet in a confined space, the recirculation of heated air at a small nozzle-to-surface spacing results in deterioration of its impingement cooling ability. To overcome this drawback, various novel fluid diodes are designed and introduced to form hybrid synthetic jets in this paper. Numerical analyses are carried out to reveal the cooling performance enhancement mechanism of the hybrid synthetic jets with the aid of fluid diodes. Instantaneous images of velocity contour and streamline at one cycle are comparatively presented to elaborate on their flow characteristics. Based on the simulation results, the volumetric efficiency, air temperature at the nozzle exit, average temperature on the heated surface and average Nusselt number are further calculated to quantify the improvements of the proposed hybrid synthetic jets compared to the conventional synthetic jet. The hybrid synthetic jet with a convergence nozzle generates the best cooling ability among various configurations. This study provides significant guidance for the design of novel hybrid synthetic jets with high-efficiency impingement cooling performance.",
keywords = "Confined space, Fluid diode, Heat transfer, Impingement cooling, Synthetic jet",
author = "Qinghua Yu and Ziyue Mei and Mengqi Bai and Danmei Xie and Yulong Ding and Yongliang Li",
year = "2019",
month = jul,
day = "5",
doi = "10.1016/j.applthermaleng.2019.113749",
language = "English",
volume = "157",
journal = "Applied Thermal Engineering",
issn = "1359-4311",
publisher = "Elsevier Korea",

}

RIS

TY - JOUR

T1 - Cooling performance improvement of impingement hybrid synthetic jets in a confined space with the aid of a fluid diode

AU - Yu, Qinghua

AU - Mei, Ziyue

AU - Bai, Mengqi

AU - Xie, Danmei

AU - Ding, Yulong

AU - Li, Yongliang

PY - 2019/7/5

Y1 - 2019/7/5

N2 - For the conventional synthetic jet in a confined space, the recirculation of heated air at a small nozzle-to-surface spacing results in deterioration of its impingement cooling ability. To overcome this drawback, various novel fluid diodes are designed and introduced to form hybrid synthetic jets in this paper. Numerical analyses are carried out to reveal the cooling performance enhancement mechanism of the hybrid synthetic jets with the aid of fluid diodes. Instantaneous images of velocity contour and streamline at one cycle are comparatively presented to elaborate on their flow characteristics. Based on the simulation results, the volumetric efficiency, air temperature at the nozzle exit, average temperature on the heated surface and average Nusselt number are further calculated to quantify the improvements of the proposed hybrid synthetic jets compared to the conventional synthetic jet. The hybrid synthetic jet with a convergence nozzle generates the best cooling ability among various configurations. This study provides significant guidance for the design of novel hybrid synthetic jets with high-efficiency impingement cooling performance.

AB - For the conventional synthetic jet in a confined space, the recirculation of heated air at a small nozzle-to-surface spacing results in deterioration of its impingement cooling ability. To overcome this drawback, various novel fluid diodes are designed and introduced to form hybrid synthetic jets in this paper. Numerical analyses are carried out to reveal the cooling performance enhancement mechanism of the hybrid synthetic jets with the aid of fluid diodes. Instantaneous images of velocity contour and streamline at one cycle are comparatively presented to elaborate on their flow characteristics. Based on the simulation results, the volumetric efficiency, air temperature at the nozzle exit, average temperature on the heated surface and average Nusselt number are further calculated to quantify the improvements of the proposed hybrid synthetic jets compared to the conventional synthetic jet. The hybrid synthetic jet with a convergence nozzle generates the best cooling ability among various configurations. This study provides significant guidance for the design of novel hybrid synthetic jets with high-efficiency impingement cooling performance.

KW - Confined space

KW - Fluid diode

KW - Heat transfer

KW - Impingement cooling

KW - Synthetic jet

UR - http://www.scopus.com/inward/record.url?scp=85065545121&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2019.113749

DO - 10.1016/j.applthermaleng.2019.113749

M3 - Article

AN - SCOPUS:85065545121

VL - 157

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

M1 - 113749

ER -