Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface

Name: Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface
Author: Hea, X., Lustbader, J. A., Arık, Mehmet, Sharma, R.

İsim	Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface
Yazar	Hea, X., Lustbader, J. A., Arık, Mehmet, Sharma, R.
Basım Tarihi:	2015-01
Basım Yeri	- Elsevier
Konu	Synthetic jet, Steady jet, Heat transfer, Impingement cooling, Electronics thermal management
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0017-9310
Kayıt Numarası	5288831c-1a6b-48dc-bb6c-9d3bcfbe42f5
Lokasyon	Mechanical Engineering
Tarih	2015-01
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	In this paper, heat transfer characteristics of single-slot impinging steady and synthetic jets on a 25.4-mm × 25.4-mm vertical surface were experimentally investigated. The experiments were conducted with a fixed nozzle width of 1 mm. For the steady jet study, the parameters varied in the testing were nozzle length (4 mm, 8 mm, 12 mm, 15 mm), Reynolds (Re) number (100–2500), and dimensionless nozzle-to-plate spacing (H/Dh = 5, 10, 15, 20). Correlations for average Nusselt (Nu) number were developed to accurately describe experimental data. The heat transfer coefficient over a vertical surface increases with increasing Re number. For a small nozzle-to-plate spacing (H/Dh = 5), the average Nu number is not only a function of the Re number, but also a function of nozzle length. For large nozzle-to-plate spacing (H/Dh ⩾ 10) and a nozzle length larger than 8 mm, the heat transfer coefficient is insensitive to H/Dh and nozzle length. An 8-mm × 1-mm synthetic jet was studied by varying the applied voltage (20–100 V), frequency (200–600 Hz), and dimensionless nozzle-to-plate spacing (H/Dh = 5, 10, 15, 20). Compared to the steady jet, the synthetic jet exhibited up to a 40% increase in the heat transfer coefficient. The dynamic Re number was introduced to correlate heat transfer characteristics between synthetic jets and steady jets. Using the dynamic Re number collapses the synthetic and steady jet data into a single Nu number curve.
DOI	10.1016/j.ijheatmasstransfer.2014.08.006
Cilt	80

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Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface

Yazar Hea, X., Lustbader, J. A., Arık, Mehmet, Sharma, R.

Basım Tarihi 2015-01

Basım Yeri - Elsevier

Konu Synthetic jet, Steady jet, Heat transfer, Impingement cooling, Electronics thermal management

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0017-9310

Kayıt Numarası 5288831c-1a6b-48dc-bb6c-9d3bcfbe42f5

Lokasyon Mechanical Engineering

Tarih 2015-01

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin In this paper, heat transfer characteristics of single-slot impinging steady and synthetic jets on a 25.4-mm × 25.4-mm vertical surface were experimentally investigated. The experiments were conducted with a fixed nozzle width of 1 mm. For the steady jet study, the parameters varied in the testing were nozzle length (4 mm, 8 mm, 12 mm, 15 mm), Reynolds (Re) number (100–2500), and dimensionless nozzle-to-plate spacing (H/Dh = 5, 10, 15, 20). Correlations for average Nusselt (Nu) number were developed to accurately describe experimental data. The heat transfer coefficient over a vertical surface increases with increasing Re number. For a small nozzle-to-plate spacing (H/Dh = 5), the average Nu number is not only a function of the Re number, but also a function of nozzle length. For large nozzle-to-plate spacing (H/Dh ⩾ 10) and a nozzle length larger than 8 mm, the heat transfer coefficient is insensitive to H/Dh and nozzle length. An 8-mm × 1-mm synthetic jet was studied by varying the applied voltage (20–100 V), frequency (200–600 Hz), and dimensionless nozzle-to-plate spacing (H/Dh = 5, 10, 15, 20). Compared to the steady jet, the synthetic jet exhibited up to a 40% increase in the heat transfer coefficient. The dynamic Re number was introduced to correlate heat transfer characteristics between synthetic jets and steady jets. Using the dynamic Re number collapses the synthetic and steady jet data into a single Nu number curve.

DOI 10.1016/j.ijheatmasstransfer.2014.08.006

Cilt 80