Back to Search

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

Title	Heat transfer characteristics of impinging steady and synthetic jets over vertical flat surface
Author	Hea, X., Lustbader, J. A., Arık, Mehmet, Sharma, R.
Publication Date:	2015-01
Publication Place	- Elsevier
Subject	Synthetic jet, Steady jet, Heat transfer, Impingement cooling, Electronics thermal management
Type	Periodical
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	0017-9310
Record ID	5288831c-1a6b-48dc-bb6c-9d3bcfbe42f5
Library Location	Mechanical Engineering
Date	2015-01
Notes	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text	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

View in source Özyeğin University Özyeğin University - Historical works, archives, and periodicals search engine

Özyeğin University

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

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

Publication Date 2015-01

Publication Place - Elsevier

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

Type Periodical

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 0017-9310

Record ID 5288831c-1a6b-48dc-bb6c-9d3bcfbe42f5

Library Location Mechanical Engineering

Date 2015-01

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

Sample Text 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