Pressure distribution along valve reeds of hermetic compressors

Ferreira, R. T. S.; Deschamps, César J.; Prata, A. T.

doi:10.1016/0894-1777(89)90034-4

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…The results of Ferreira et al 9 and Gasche et al 18 showed that the pressure distribution is even under the valve in the radius range [0, d/2). This suggests that the static pressure in [0, d/2) equals P 2 .…”

Section: Theoretical Analysis and Modelingmentioning

confidence: 94%

“…More specifically, the operating principle of all types of automatic valves is similar regardless of the structural differences. 11 The representative investigations on radial flow were made by Hayashi et al, 12 Wark and Foss, 10 Boswirth, [13][14][15] Ferreira et al, 9,16 Price and Botros, 17 Gasche et al, 18 Possamai et al, 19 Tang and Chang, 20 and Pereira. 21 Besides, the more relevant investigations on the system of this study have been made by Wood, 22 Bolles, 23 Klein,24 and Lockett.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, few efforts have been made to solve this problem. 8,9 To get a good approximation of this flow type, the float valve is usually simplified as a "radial diffusers." The interaction between the fluid and the float valve was explored by investigating the flow conditions of fluid flowing in the radial diffusers.…”

Section: Introductionmentioning

confidence: 99%

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A new dry tray pressure drop model of float valve trays

et al. 2013

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An accurate prediction of the dry pressure drop is very important for consideration of valve trays and for calculations in distillation field. Therefore, in this article, a series of hydraulic experiments were first conducted to reveal that the intermediate state during the valve opening process is closely related to the dry tray pressure drop under great valve weight. Then, a rigorous force analysis was made to show that Euler number is related only to the valve's position at the balance points for a certain valve type. Third, a new model for prediction of the dry tray pressure drop-which considers for the first time the influence of the intermediate state-was developed and then simplified for the purpose of convenient utilizations. Finally, the new model and its simplified form were tested by comparisons with the experimental results. The agreements are good, with the mean deviations being <5%.

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Section: Theoretical Analysis and Modelingmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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A new dry tray pressure drop model of float valve trays

et al. 2013

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“…Due to the small value of s c /d, the fluid is strongly accelerated in the feeding orifice as it approaches the diffuser entrance. Due to this acceleration, the inlet boundary condition for the velocity profile plays no role in the solution of the flow field in the diffuser [4]. Thus, a uniform flow boundary condition was prescribed at the inlet according to the Reynolds number ðRe ¼ q ud=lÞ and the radial velocity specified as zero (v = 0).…”

Section: Problem Formulationmentioning

confidence: 99%

“…On the other hand, the interaction between the flow field and the valve dynamics is quite complex and very few studies have modeled such a solid-fluid interaction [16]. For fluid flow in radial diffusers in the context of compressor valves the reader is referred to Ferreira et al [4], Prata and Ferreira [17], Prata et al [18], Deschamps et al [2], and Ferreira and Driessen [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of fluid flow through radial diffusers in the presence of a chamfer in the feeding orifice with a mixed Eulerian–Lagrangian method

2010

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Pressure-based Semi-analytical Solution of Radial Stokes Flows

Oliveira

Amón

1998

Journal of Mathematical Analysis and Applications

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A semi-analytical methodology is proposed and implemented to approximate the solution of the partial differential equations that model the radial Stokes flow between two parallel disks. Two traditional approaches for solving partial differential equations of mathematical physics, namely, eigenfunction expansions and Green's function representations, are used to obtain directly the pressure distribution for a variety of inflow boundary conditions. We combine these standard techniques with a functional analytic framework to propose a proper representation for the pressure. This methodology has been implemented first in a symbolic Ž ᮋ . software Mathematica and then numerically. We provide both validation of the methodology when an exact solution exists and comparison with a spectral element solver for a test case where inflow boundary conditions render the existence of a recirculation zone close to the entrance of the domain. We briefly discuss how to extend the methodology to handle the Navier᎐Stokes equation in radial flowᎏa subject that will be presented in detail in a following paper. ᮊ

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Pressure distribution along valve reeds of hermetic compressors

Cited by 21 publications

References 7 publications

A new dry tray pressure drop model of float valve trays

A new dry tray pressure drop model of float valve trays

Numerical analysis of fluid flow through radial diffusers in the presence of a chamfer in the feeding orifice with a mixed Eulerian–Lagrangian method

Pressure-based Semi-analytical Solution of Radial Stokes Flows

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