Impingement heat transfer at a circular cylinder due to a submerged slot jet of water

✍ Scribed by C. Bartoli; P. Di Marco; S. Faggiani

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 112 KB
• Volume: 7
• Category: Article
• ISSN: 0894-1777
• DOI: 10.1016/0894-1777(93)90156-d

✦ Synopsis

Research was carried out on the heat transfer due to a submerged slot jet of water impinging on a circular cylinder in cross-flow. The cylinder diameter and the slot width are of the same order of magnitude, specifically D s = 2.0 and 3.0 mm and D c = 2.5 and 3.0 mm. The experimental apparatus allowed the variation of the slot width, the cylinder diameter, and the distance from nozzle exit to heater. Conditions of impingement from the bottom (ascending flow) were taken into consideration as well as impingement from above (descending flow). The Nusselt number was determined as a function of Reynolds and Prandtl numbers in the range 1.5 x 103 < Re < 2.0 × 104, 2.7 < Pr < 7.0 and 1.5 < z/Ds < 10. The experimental data were correlated with a simple equation that fits 90% of the data with a precision of 20%.