Numerical and experimental analysis of impinging synthetic jets for cooling a point-like heat source

Name: Numerical and experimental analysis of impinging synthetic jets for cooling a point-like heat source
Author: Glowienko, G., Derlien, H., Ertunç, Özgür, Delgado, A.

İsim	Numerical and experimental analysis of impinging synthetic jets for cooling a point-like heat source
Yazar	Glowienko, G., Derlien, H., Ertunç, Özgür, Delgado, A.
Basım Tarihi:	2018-05-01
Basım Yeri	- ASME
Konu	Flow
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0022-1481
Kayıt Numarası	5a896443-9f0b-4a5b-83d1-7c3c6f27fa76
Lokasyon	Mechanical Engineering
Tarih	2018-05-01
Örnek Metin	High power light emitting diodes (LEDs) being used for low and high beam in automotive lighting need active cooling of their heat sinks by radial or axial fans. But the moving elements of the fan cause abrasion, noise, and high energy consumption. Synthetic jets can replace conventional fans with their disadvantages and allow the directed cooling of LEDs. Therefore, in this paper, flow and heat transfer characteristics of impinging synthetic jets are investigated numerically and experimentally as an alternative to cooling LEDs with fans. It is shown that the impact plate brings forward the laminar-turbulent transition of the jets temporally and spatially. The impact plate itself should not be positioned in the region of the free jet's transition height. Increasing the frequency of the synthetic jet has a greater influence on the heat transfer compared to an increase in amplitude. The maximum cooling performance is achieved for all jet configurations with moderate distances between the orifice and the impact plate. In this case, the jet reaches its highest mass flow and impulse and its lowest temperature.
DOI	10.1115/1.4038547
Cilt	140

Kaynağa git Özyeğin Üniversitesi

Aramaya Dön

Özyeğin Üniversitesi

Kaynağa git

Numerical and experimental analysis of impinging synthetic jets for cooling a point-like heat source

Yazar Glowienko, G., Derlien, H., Ertunç, Özgür, Delgado, A.

Basım Tarihi 2018-05-01

Basım Yeri - ASME

Konu Flow

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0022-1481

Kayıt Numarası 5a896443-9f0b-4a5b-83d1-7c3c6f27fa76

Lokasyon Mechanical Engineering

Tarih 2018-05-01

Örnek Metin High power light emitting diodes (LEDs) being used for low and high beam in automotive lighting need active cooling of their heat sinks by radial or axial fans. But the moving elements of the fan cause abrasion, noise, and high energy consumption. Synthetic jets can replace conventional fans with their disadvantages and allow the directed cooling of LEDs. Therefore, in this paper, flow and heat transfer characteristics of impinging synthetic jets are investigated numerically and experimentally as an alternative to cooling LEDs with fans. It is shown that the impact plate brings forward the laminar-turbulent transition of the jets temporally and spatially. The impact plate itself should not be positioned in the region of the free jet's transition height. Increasing the frequency of the synthetic jet has a greater influence on the heat transfer compared to an increase in amplitude. The maximum cooling performance is achieved for all jet configurations with moderate distances between the orifice and the impact plate. In this case, the jet reaches its highest mass flow and impulse and its lowest temperature.

DOI 10.1115/1.4038547

Cilt 140