Flow impingement on a perforated plate at an angle of attack

Yilmaz Bayazit, Ephraim M Sparrow, John M Gorman

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose - The purpose of this paper is to provide both directly applicable fluid-flow results and fluid-mechanic fundamentals for flow impinging at an angle of attack on a perforated plate. Design/methodology/approach - A physical situation was modeled with high fidelity, and the model was implemented by numerical simulation. The simulations spanned all possible flow regimes including laminar, intermittent (transitional) and turbulent, and the Reynolds numbers that defined each flow regime were definitively determined. The Reynolds numbers ranged from 0.1 to 30,000, the angles of attack included 0, 5, 15 and 22.5° and the host duct dimensions varied appropriately. Findings - It was found that the perforated-plate pressure drop decreased moderately with an increasing angle of attack, an outcome directly relevant to design. The pattern of fluid flow caused by the presence of the plate was dominated by a large recirculation zone situated downstream of the plate in a corner between the plate and an adjacent wall. The recirculation zone played the role of a blockage which deflected the flow emerging from the apertures in the plate toward the opposite wall. Originality/value - (a) Pressure drop information directly applicable to design, (b) downstream distance from the plate at which the plate-created flow disturbance disappears, (c) account taken of the intermittent flow regime between laminar and turbulent, (d) implementation of a new metric to characterize the strength of turbulence.

Original languageEnglish (US)
Pages (from-to)64-76
Number of pages13
JournalInternational Journal of Numerical Methods for Heat and Fluid Flow
Volume27
Issue number1
DOIs
StatePublished - Jan 1 2017

Fingerprint

Perforated plates
Angle of attack
Attack
Angle
Pressure drop
Flow of fluids
Reynolds number
Fluid mechanics
Ducts
Pressure Drop
Turbulence
Fluid Flow
Computer simulation
Fluid Mechanics
Fidelity
Design Methodology
Adjacent
Disturbance
Metric
Numerical Simulation

Keywords

  • Angle of attack
  • Laminar flow
  • Perforated plate
  • Pressure drop
  • Turbulent flow

Cite this

Flow impingement on a perforated plate at an angle of attack. / Bayazit, Yilmaz; Sparrow, Ephraim M; Gorman, John M.

In: International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 27, No. 1, 01.01.2017, p. 64-76.

Research output: Contribution to journalArticle

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