An investigation into flow and heat transfer for a slot impinging synthetic jet

Name: An investigation into flow and heat transfer for a slot impinging synthetic jet
Author: Ghaffari, Omidreza, Solovitz, S. A., Arık, Mehmet

İsim	An investigation into flow and heat transfer for a slot impinging synthetic jet
Yazar	Ghaffari, Omidreza, Solovitz, S. A., Arık, Mehmet
Basım Tarihi:	2016-09
Basım Yeri	- Elsevier
Konu	Synthetic jet, Impingement, Electronics cooling, Particle image velocimetry, Phase-locked transient flow
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0017-9310
Kayıt Numarası	336b7b7e-44d5-4bb6-b463-c557820f93aa
Lokasyon	Mechanical Engineering
Tarih	2016-09
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	According to the latest trends in miniature consumer and military electronics, there is a need for compact cooling solutions to meet performance requirements at compact volumes. Successful technology must feature a thin profile and a small footprint area, while still removing a significant amount of heat dissipation. Impinging synthetic jets driven by a piezoelectric membrane are a promising method for cooling small-scale electronics. In this paper, we explore the thermal response of a miniature synthetic jet impinging upon a vertical heater. In addition, we study the local flow field using the particle image velocimetry (PIV) technique to couple heat transfer with fluid dynamics. Heat transfer results show that the maximum cooling performance occurs with a jet-to-surface spacing of 5 ⩽ H/Dh ⩽ 10, which is associated with the flow consisting of coherent vortex structures. There is a degradation of heat transfer for closer jet-to-surface spacings, such as H/Dh = 2. This was due to the incomplete growth of the vortices, along with re-entrainment of warm air from the impinging plate back into the jet flow. There was also some warm air sucked back into the jet during the suction phase of the synthetic jet. For a fixed value of Reynolds number, cooling was improved at high Stokes numbers, but with a reduced coefficient of performance.
DOI	10.1016/j.ijheatmasstransfer.2016.04.115
Cilt	100

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An investigation into flow and heat transfer for a slot impinging synthetic jet

Yazar Ghaffari, Omidreza, Solovitz, S. A., Arık, Mehmet

Basım Tarihi 2016-09

Basım Yeri - Elsevier

Konu Synthetic jet, Impingement, Electronics cooling, Particle image velocimetry, Phase-locked transient flow

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0017-9310

Kayıt Numarası 336b7b7e-44d5-4bb6-b463-c557820f93aa

Lokasyon Mechanical Engineering

Tarih 2016-09

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

Örnek Metin According to the latest trends in miniature consumer and military electronics, there is a need for compact cooling solutions to meet performance requirements at compact volumes. Successful technology must feature a thin profile and a small footprint area, while still removing a significant amount of heat dissipation. Impinging synthetic jets driven by a piezoelectric membrane are a promising method for cooling small-scale electronics. In this paper, we explore the thermal response of a miniature synthetic jet impinging upon a vertical heater. In addition, we study the local flow field using the particle image velocimetry (PIV) technique to couple heat transfer with fluid dynamics. Heat transfer results show that the maximum cooling performance occurs with a jet-to-surface spacing of 5 ⩽ H/Dh ⩽ 10, which is associated with the flow consisting of coherent vortex structures. There is a degradation of heat transfer for closer jet-to-surface spacings, such as H/Dh = 2. This was due to the incomplete growth of the vortices, along with re-entrainment of warm air from the impinging plate back into the jet flow. There was also some warm air sucked back into the jet during the suction phase of the synthetic jet. For a fixed value of Reynolds number, cooling was improved at high Stokes numbers, but with a reduced coefficient of performance.

DOI 10.1016/j.ijheatmasstransfer.2016.04.115

Cilt 100