ME405_Lecture_40 - ME 405 Fall 2006 Professor John M Cimbala Lecture 40 Today we will Discuss cyclone collectors in Section 9.1 Do an example

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ME 405 Fall 2006 Professor John M. Cimbala Lecture 40 12/11/2006 Today, we will : Discuss cyclone collectors in Section 9.1 Do an example problem – parallel cyclone collectors Discuss other inertial separation collectors and sampling issues (cascade impactors and isokinetic sampling) in Section 9.2 If time, begin to discuss impaction between moving particles (spray chambers, scrubbers, etc.) in Section 9.3 Section 9.1 – Cyclone Collectors
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Straight-through cyclone: Q 0 , c in = c 0 dirty air in Q e , c out = c e cleaned air out r 1 Q b dust and bleed air out r 2 α U x U θ x L Figure 9.1 Straight-through cyclone collector with helical turning blades; bleed air is required to remove particles.
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Reverse-flow cyclone: top view side view Figure 9.2 Lapple standard reverse-flow cyclone collector with tangential entry, and with characteristic dimensions given by Eqs. (9-5) and (9-6).
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Lapple standard reverse-flow cyclone: particle size ratio, D p /D p,cut η (D p ) (%) Figure 9.3 Normalized grade efficiency of a Lapple standard reverse-flow cyclone.
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This note was uploaded on 07/23/2008 for the course ME 521 taught by Professor Cimbala during the Fall '07 term at Pennsylvania State University, University Park.

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ME405_Lecture_40 - ME 405 Fall 2006 Professor John M Cimbala Lecture 40 Today we will Discuss cyclone collectors in Section 9.1 Do an example

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