Flow impingement on a perforated plate at an angle of attack

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.

Flow–pressure drop characteristics of perforated plates

“…The selection of the SST k − ω turbulence model (Menter, 1994) for application here is based on substantial literature. In this regard, reference may be made to Guo et al (2013), Shklyar and Arbel (2007), and Bayazit et al (2014, 2017) for successful applications of the SST k − ω model to perforated plates and for separated flows. As this model and approach has been verified experimentally by research for perforated plates (Bayazit et al , 2014, 2017), the current paper will present a different forms of validation which will be presented later in Section 6.…”

“…In this regard, reference may be made to Guo et al (2013), Shklyar and Arbel (2007), and Bayazit et al (2014, 2017) for successful applications of the SST k − ω model to perforated plates and for separated flows. As this model and approach has been verified experimentally by research for perforated plates (Bayazit et al , 2014, 2017), the current paper will present a different forms of validation which will be presented later in Section 6. A summary of generic validation studies for this turbulence model can be found in Sparrow et al (2017).…”

“…The study of perforated plates range in application from pressure losses in reactor columns (McAllister et al , 1958; Smith and Van Winkle, 1958) and heat transfer design (Kutscher, 1994; Arghode and Joshi, 2015) to acoustical sound management (Guess, 1975; Jing and Sun, 2000) and control of turbulence (Liu et al , 2004; Liu and Ting, 2007). With respect to pressure drop caused by perforated plates, the literature can be divided into two primary categories, experimental (Gan and Riffat, 1997; Doerffer and Bohning., 2000; Szwaba et al , 2013; Castro, 1971) and numerical (Bae and Kim, 2016; Guo et al , 2013; Shklyar and Arbel, 2007; Bayazit et al , 2014; Bayazit et al , 2017).…”

“…In a pair of studies, Bayazit et al (2014, 2017) investigated rectangular perforated-plate flow characteristics by numerical simulation and verifying experimentation. The numerical results were algebraically correlated by an expression based on a modification of the Darcy–Forchheimer (D-F) model for flow through a porous medium.…”

3D numerical investigation of energy transfer and loss of cavitation flow in perforated plates

“…Tanner (2019) studied the quantitative relationship between the flow characteristic and pressure drop for perforated plates. Bayazit et al (2017) found that the pressure drop of perforated plate decreased moderately with an increasing attack angle. Celik et al (2018) determined how different parameters affect the capability of the perforated plates and modified the design by using Taguchi method for optimization.…”