Heat-transfer characteristics of an oblique impinging jet with confined wall

✍ Scribed by Koichi Ichimiya; Toshiyuki Nasu

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 120 KB
• Volume: 7
• Category: Article
• ISSN: 0894-1777
• DOI: 10.1016/0894-1777(93)90155-c

✦ Synopsis

The 3rd World Conference for heat transfer and pressure drop is the ratio of fin pitch p to fin height h. With large values of p/h, the fins act primarily as turbulence promoters generating a high heat transfer coefficient and also a large pressure loss. The increase of heat transfer surface is negligible. With smaller ratios, p/h Nusselt-number Nu and friction factor ~: decrease, but the heat flux reaches a maximum. The aim of this experimental investigation was the determination of Nusselt number and friction factor and their presentation in an appropriate form as a function of the fin geometry. The following range of fin parameters were studied: fin heights h = 2 to 6 mm fin pitches p = 2.2 to 105.6 mm.

The inner tube diameter of the annulus was 40 mm for all measurements. The fin thickness was 1 mm. The results were obtained for Reynolds numbers between 5.000 < Re < 150.000. The working fluid was water.