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Journal ArticleDOI

An Experimental Study of the Vortex in the Cyclone Separator

01 Dec 1962-Journal of Basic Engineering (American Society of Mechanical Engineers)-Vol. 84, Iss: 4, pp 602-608
TL;DR: In this article, the symmetric vortex in a cylindrical cyclone with a flat bottom was studied with the aid of smoke, and was probed for the distribution of the velocity.
Abstract: The symmetric vortex in a cylindrical cyclone with a flat bottom was studied with the aid of smoke, and was probed for the distribution of the velocity. The smoke studies revealed a laminar regime of flow at very low velocities, the normal turbulent regime of operation, and a new periodic regime of flow in which the vortex turned and attached to the cylindrical wall of the cyclone. A curious core region apparently capable of separating tobacco smoke from the air was also found. The velocity distribution measured in the vortex showed how the flow pattern is strongly influenced by the inlet area of the cyclone.
Citations
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Journal ArticleDOI
TL;DR: The main effects of swirl are to improve flame stability as a result of the formation of toroidal recirculation zones and to reduce combustion lengths by producing high rates of entrainment of the ambient fluid and fast mixing as discussed by the authors.

837 citations

Journal ArticleDOI
TL;DR: In this paper, a descriptive experimental study was made in both air and water of the temporally periodic motion that occurs in the vortex whistle and cyclone separator, which can be described in terms of an oscillator that derives its energy from hydrodynamic instability of the steady swirling flow and whose frequency is determined by an angular velocity characteristic of this steady flow.
Abstract: A descriptive experimental study was made in both air and water of the temporally periodic motion that occurs in the vortex whistle and cyclone separator. The motion can be described in terms of an oscillator that derives its energy from hydrodynamic instability of the steady swirling flow and whose frequency is determined by an angular velocity characteristic of this steady flow. The relevant dynamical parameters are the Rossby number and Reynolds number for the steady flow with the addition of the Strouhal number for the time-dependent flow. The results of this study were compared with the vortex breakdown phenomenon over swept-back wings. Breakdown can be described in the same terms as for the other two cases and it appears that all three motions are basically the same.

149 citations

Journal ArticleDOI
TL;DR: In this paper, a mathematical model has been developed for calculation of cut-off size and fractional efficiencies in cyclone separators, by taking into account the effects of flow, particle and geometrical parameters, and acceleration assuming that the mixture of fluid and particles is homogenous.

145 citations

Journal ArticleDOI
TL;DR: In this article, the single phase flow field of a gas cyclone has been simulated with a finite volume RANS model and two LES approaches, one with finite volume and one with lattice-Boltzmann discretization.

120 citations


Cites background from "An Experimental Study of the Vortex..."

  • ...Depending on the operating conditions and cyclone geometry, the frequency of the precession was measured to be between 13 Hz and 400 Hz (see Smith [21], Yzdabadi et al. [22], Hoekstra et al. [23])....

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  • ...Depending on the operating conditions and cyclone geometry, the frequency of the precession was measured to be between 13 Hz and 400 Hz (see Smith [21], Yzdabadi et al....

    [...]

Journal ArticleDOI
TL;DR: In this article, a methode des differences finies de jets libres fortement tourbillonnaires is defined, and a recirculation apparait a proximite de la tuyere, in which l'introduction de modifications liees au tour-billonnement dans le modele de turbulence k-e and aux changements dans les conditions aux limites pour la vitesse de dissipation e and la Vitesse radiale au plan d'entree du jet
Abstract: Calcul par la methode des differences finies de jets libres fortement tourbillonnaires. Une recirculation apparait a proximite de la tuyere. Etude de la reponse du champ calcule a l'introduction de modifications liees au tourbillonnement dans le modele de turbulence k-e et aux changements dans les conditions aux limites pour la vitesse de dissipation e et la vitesse radiale au plan d'entree du jet

91 citations