A new role for reduction in pressure drop in cyclones using computational fluid dynamics techniques
Document title: A new role for reduction in pressure drop in cyclones using computational fluid dynamics techniques
Journal: Brazilian journal of chemical engineering
Database: PERIÓDICA
System number: 000308975
ISSN: 0104-6632
Authors: 1
2
Institutions: 1Universidade Regional de Blumenau, Centro de Ciencias Tecnologicas, Blumenau, Santa Catarina. Brasil
2Universidade Estadual de Campinas, Faculdade de Engenharia Quimica, Campinas, Sao Paulo. Brasil
Year:
Season: Ene
Volumen: 21
Number: N
Pages: 93-101
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract In this work a new mechanical device to improve the gas flow in cyclones by pressure drop reduction is presented and discussed. This behavior occurs due to the effects of introducing swirling breakdown phenomenon at the inlet of the vortex finder tube. The device consists of a tube with two gas inlets in an appositive spiral flux that produces a sudden reduction in the tangential velocity peak responsible for practically 80 % of the pressure drop in cyclones. In turn, peak reduction causes a decrease in pressure drop by a breakdown of the swirling, and because of this the solid particles tend to move faster toward the wall , increasing collection efficiency. As a result of this phenomenon the overall performance of cyclones is improved. Numerical simulations with 3-D, transient, asymmetric and anisotropic turbulence closure by differential Reynolds stress for Lapple and Stairmand standard geometries of 0.3 m in diameter, show a reduction in pressure drop of 20 % and a shift of the tangential velocity peak toward the wall. All numerical experiments were carried out with a commercial CFD code showing numerical stability and good convergence rates with high-order interpolation schemes, SIMPLEC pressure-velocity coupling and other numerical features
Disciplines: Química
Keyword: Ingeniería química,
Flujo de gases,
Ciclones,
Dinámica de fluidos computacional (CFD),
Caída de presión,
Turbulencia
Keyword: Chemistry,
Chemical engineering,
Gas flow,
Cyclones,
Computational fluid dynamics (CFD),
Pressure drop,
Turbulence
Full text: Texto completo (Ver HTML)