Thermal separation in near-axis boundary layers with intense swirl

Swirling flows have a wide range of applications and exhibit a variety of interesting features. Gas cooling near the axis in these flows, the so-called Ranque–Hilsch effect, is one of them. To gain insight into this phenomenon, we have analyzed the thermal, near-axis boundary layer of a gas jet driv...

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Bibliographic Details
Published in:Physics of fluids (1994) 1999-12, Vol.11 (12), p.3678-3687
Main Authors: Herrada, M. A., Pérez-Saborid, M., Barrero, A.
Format: Article
Language:English
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Summary:Swirling flows have a wide range of applications and exhibit a variety of interesting features. Gas cooling near the axis in these flows, the so-called Ranque–Hilsch effect, is one of them. To gain insight into this phenomenon, we have analyzed the thermal, near-axis boundary layer of a gas jet driven by a class of conical inviscid quasi-incompressible flows whose axial and azimuthal velocity components, w and v, and stagnation temperature, T t , behave near the axis as w=W 0 r m−2 ,v=LW 0 r m−2 , and T t −T r =T 0 r 2(m−2) , where z and r are the axial and radial coordinates, L is the Squire number directly related to the swirl strength, m is any real number such as 1⩽m
ISSN:1070-6631
1089-7666
DOI:10.1063/1.870231