An experimental study of the near-ﬁeld mixing characteristics of a swirling jet
2008 (English)In: Flow Turbulence and Combustion, ISSN 1386-6184, E-ISSN 1573-1987, Vol. 80, no 3, 323-350 p.Article in journal (Refereed) Published
The present experimental investigation is devoted to the mixing charac- teristics of a passive scalar in the near-ﬁeld region of a moderately swirling jet issuing from a fully developed axially rotating pipe ﬂow. Instantaneous streamwise and azimuthal velocity components as well as the temperature were simultaneously accessed by means of a combined X-wire and cold-wire probe. The results indicate a modiﬁcation of the turbulence structures to that effect that the swirling jet spreads, mixes and evolves faster compared to its non-swirling counterpart. The high correlation between streamwise velocity and temperature ﬂuctuations as well as the streamwise passive scalar ﬂux are even more enhanced due to the addition of swirl, which in turn shortens the distance and hence time needed to mix the jet with the ambient air.
Place, publisher, year, edition, pages
Netherlands: Springer , 2008. Vol. 80, no 3, 323-350 p.
Swirling jet, passive scalar mixing, hot-wire anemometry, heated jet
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-10447DOI: 10.1007/s10494-007-9126-yISI: 000254248800003ScopusID: 2-s2.0-43449084090OAI: oai:DiVA.org:kth-10447DiVA: diva2:217473
QC 201008202009-05-142009-05-142010-12-07Bibliographically approved