Local Nusselt number distributions for a square array of round air jets impinging on a flat surface and a concave surface were measured in high resolution by naphthalene sublimation techniques. Corresponding numerical simulations using a realizable k-ε model were also conducted to investigate the heat transfer characteristics of the multiple jets and to clarify the complex flow structure. The experiments were conducted for Re = 5000, 10000, and 15000 at the non-dimensional nozzle to plate distance of 3.75. The Nusselt number for both flat and concave surfaces increased as Reynolds number increased from 5000 to 10000. Unexpectedly, experimental results showed the tendency of Nu to be saturated for Re = 15000, while showing a monotonic increase in numerical simulations. Most amount of wall jets from a central impinging jet formed large-scale recirculating flows, which surrounded free jet region of each jet, while some other wall jet were entrained by a small vortical structure near the target wall and merged into large-scale recirculating flow of the neighboring jets.
Skip Nav Destination
ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4276-2
PROCEEDINGS PAPER
Heat Transfer for Round Air Jets Flowing Along a Concave Surface Available to Purchase
Kenichiro Takeishi,
Kenichiro Takeishi
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Yutaka Oda,
Yutaka Oda
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Naoki Yoshida
Naoki Yoshida
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Ryuta Ito
Mitsubishi Heavy Industries, Ltd.
Kenichiro Takeishi
Osaka University, Suita, Osaka, Japan
Yutaka Oda
Osaka University, Suita, Osaka, Japan
Naoki Yoshida
Osaka University, Suita, Osaka, Japan
Paper No:
HT2007-32616, pp. 597-605; 9 pages
Published Online:
August 24, 2009
Citation
Ito, R, Takeishi, K, Oda, Y, & Yoshida, N. "Heat Transfer for Round Air Jets Flowing Along a Concave Surface." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 597-605. ASME. https://doi.org/10.1115/HT2007-32616
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Local Heat Transfer Distributions in Confined Multiple Air Jet Impingement
J. Electron. Packag (September,2001)
Heat Transfer From a Finned Surface in Ducted Air Jet Suction and Impingement
J. Electron. Packag (September,2000)
Numerical Simulation of Oblique Air Jet Impingement on a Heated Flat Plate
J. Thermal Sci. Eng. Appl (March,2017)
Related Chapters
Adding Surface While Minimizing Downtime
Heat Exchanger Engineering Techniques
The Design and Implement of Remote Inclinometer for Power Towers Based on MXA2500G/GSM
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
A High Resolution DOA Estimation Method Based on Maximal Eigenvector Reconstruction
International Conference on Future Computer and Communication, 3rd (ICFCC 2011)