CFD modelling of scroll compressor intermediate discharge ports

Angel, B.; Ginies, Pierre; Gross, D.; Ancel, Christophe

doi:10.1533/9781782421702.11.613

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Stosic et al [24], in 1996, was one of the first to use CFD to investigate the fluid flow in scroll, adopting a quasi-steady flow approach, while De Bernardi [25], in 2000, applied CFD to demonstrate the powerfulness of the approach in the physical understanding of the lubrication process. More recently, the CFD has been used by Angel et al [26] to investigate the impact on scroll compressor performance of intermediate discharge ports and by Abdulhussain [27] to study the mixing of two-phase refrigerant dual ports through a variable speed scroll compressor. Differently, Morini et al [28] proposed an integrated Reverse-Engineering CFD methodology to study how to convert a commercial scroll compressor into an expander for a micro-ORC system.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

Cavazzini¹,

Giacomel²,

Benato³

et al. 2021

Advances in Energy Research

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Scroll compressors are widely adopted machines in both refrigeration systems and heat pumps. However, their efficiency is basically poor and constitutes the main bottleneck for improving the overall system performance. In fact, due to the complex machine fluid dynamics, scroll design is mainly based on theoretical and/or semi-empirical approaches. Designs strategies that do not guarantee an in-depth analysis of the machine behavior can be supplemented with a Computation Fluid Dynamics (CFD) approach. To this purpose, in the present work, the scroll compressor inner fluid dynamics is numerically analyzed in detail using two CFD software and two different modelling strategies for the axial gap. The analysis of the fluid evolution within the scroll wraps reveals unsteady phenomena developing during the suction and discharge phases, amplified by the axial clearance with negative impact on the main fluid flow (e.g., −13% of average mass flow rate for an axial gap of 30 µ) and on the scroll performance (e.g., +26% of average absorbed power for an axial gap of 30 µ). In terms of accuracy, the k-ε offers good performance on the estimation of average quantities but proves to be inadequate for capturing the complexity of the unsteady phenomena caused by the axial gap (e.g., −19% of the absorbed power in case of perfect tip seal). The need for Advances in Energy Research: 2 nd Edition 3 www.videleaf.com considering specific geometric details in design procedures is highlighted, and guidelines on the choice of the most suitable numerical model are provided depending on the analysis needs.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

Cavazzini¹,

Giacomel²,

Benato³

et al. 2021

Advances in Energy Research

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show abstract

“…Figure 1 shows the schematic diagram of the compressor scroll. 4) Because the orbit scroll revolves around the fixed scroll more than 10,000 times per minute, the decrease in the scroll weight remarkably enhances the compressor efficiency in terms of consuming electricity and increases the controllability of the scroll compressor.…”

Section: Introductionmentioning

confidence: 99%

Effect of Initial Microstructure on Mg Scroll Forging under Warm Forming Condition

Yoon

Lee

2014

Mater. Trans.

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Magnesium (Mg) alloys have attracted considerable interest for various applications, including those in the automotive and electronics industries, because of their high specific strength, excellent thermal conductivity, and recycling capability in comparison with commonly used aluminum alloys and steels for structural materials. One of the core parts in the compressor unit of an automobile is the scroll rotor, which is assembled with two scrolls, a rotating orbit scroll on the fixed scroll, to compress the refrigerant. In this study, we proposed a net-shape forging process and an apparatus with the back-pressure technique for the Mg scroll at a forging temperature of 350°C with an Mg6Al1Zn extruded billet. The optimum amount of back-pressure is calibrated by finite element analysis using DEFORM-3D, which enhances the wrap height distribution in the Mg scroll uniformly. To elucidate the effect of the initial texture on the forgeability of the Mg scroll, twin-induced and dynamic recrystallization (DRX)-induced specimens are applied in Mg scroll forging, where the formability of the Mg scroll with the DRXinduced specimen is found to be noticeably improved in terms of the wrap height.

show abstract

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

et al. 2021

View full text Add to dashboard Cite

Scroll compressors are widely adopted machines in both refrigeration systems and heat pumps. However, their efficiency is basically poor and constitutes the main bottleneck for improving the overall system performance. In fact, due to the complex machine fluid dynamics, scroll design is mainly based on theoretical and/or semi-empirical approaches. Designs strategies that do not guarantee an in-depth analysis of the machine behavior can be supplemented with a Computation Fluid Dynamics (CFD) approach. To this purpose, in the present work, the scroll compressor inner fluid dynamics is numerically analyzed in detail using two CFD software and two different modelling strategies for the axial gap. The analysis of the fluid evolution within the scroll wraps reveals unsteady phenomena developing during the suction and discharge phases, amplified by the axial clearance with negative impact on the main fluid flow (e.g., −13% of average mass flow rate for an axial gap of 30 μ) and on the scroll performance (e.g., +26% of average absorbed power for an axial gap of 30 μ). In terms of accuracy, the k-ε offers good performance on the estimation of average quantities but proves to be inadequate for capturing the complexity of the unsteady phenomena caused by the axial gap (e.g., −19% of the absorbed power in case of perfect tip seal). The need for considering specific geometric details in design procedures is highlighted, and guidelines on the choice of the most suitable numerical model are provided depending on the analysis needs.

show abstract

CFD modelling of scroll compressor intermediate discharge ports

Cited by 3 publications

References 1 publication

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

Effect of Initial Microstructure on Mg Scroll Forging under Warm Forming Condition

Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches

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