The round thermal jet: undisturbed and in cross-flow

✍ Scribed by Leif N. Persen; Henry Øiann; Himadri P. Mazumdar

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 700 KB
• Volume: 36
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(05)80068-7

✦ Synopsis

This paper investigates the round jet exiting from a cut-offcircular pipe into still air. It examines the similarity properties in the same way as the senior author has done for the two-dimensional jet. The same type of relations are found as in the previous case. It can be concluded that the free turbulence exhibits no relation with the jet's Reynolds number and that consequently the nozzle geometry exclusively governs the flow. The case of a heated circular jet is incorporated in the investigation and the same conclusions are drawn for the temperature field as for the velocity field. The result throws light on the dispute between Taylor and Prandtl regarding the mixing length in the two fields. The second part of the paper examines the similarity properties of the temperature field of the jet when it exits into a cross-flow of different temperature.