On the development of an efficient regenerative compressor

D. Griffini, S. Salvadori, M. Carnevale, A. Cappelletti, L. Ottanelli, F. Martelli

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Regenerative compressors are attractive machines used in several industrial processes. Their main characteristic is the highly three-dimensional development of the flow. Consequently, usual approach for axial or centrifugal compressors design are not an affordable strategy. The analysis of the rotor/stator coupling is the main issue in the design of regenerative compressors because of the vane-less nature of the stator and the characteristic trajectory of the flow. This paper describes the design of an efficient regenerative compressor based on a highly detailed Reynolds Averaged Navier-Stokes (RANS) analysis. The targets of the activity are defined in terms of expected mass-flow, pressure rise and compressor efficiency, and then a preliminary design is performed using an in-house mono-dimensional tool based on simplified assumptions for the nominal operating conditions. Once the model provided the most promising geometrical characteristics for the target operating point, three-dimensional steady RANS analyses are performed to evaluate the actual performance of the compressor for a wide range of mass-flow values. Special attention has been paid to the generation of the computational mesh and a specific solution for the rotor row has been developed. Compressibility effects are non-negligible since the flow Mach number is higher than 0.5 in several compressor sections, including the leakage zone regions where the losses are higher. The rotor and the full compressor efficiencies are evaluated and discussed to underline the importance of the rotor/volute coupling. The flow behaviour inside of the volute as well as the distribution of losses is also discussed and some guidelines for the efficient design of regenerative compressors are presented.

Original languageEnglish
Pages (from-to)252-257
Number of pages6
JournalEnergy Procedia
Volume82
Early online date19 Dec 2015
DOIs
Publication statusPublished - Dec 2015
Event70th Conference of the Italian Thermal Machines Engineering Association, ATI 2015 - Rome, Italy
Duration: 9 Sep 201511 Sep 2015

Keywords

  • CFD
  • Efficiency
  • Grid generation
  • Regenerative compressors

ASJC Scopus subject areas

  • Energy(all)

Cite this

Griffini, D., Salvadori, S., Carnevale, M., Cappelletti, A., Ottanelli, L., & Martelli, F. (2015). On the development of an efficient regenerative compressor. Energy Procedia, 82, 252-257. https://doi.org/10.1016/j.egypro.2015.12.030

On the development of an efficient regenerative compressor. / Griffini, D.; Salvadori, S.; Carnevale, M.; Cappelletti, A.; Ottanelli, L.; Martelli, F.

In: Energy Procedia, Vol. 82, 12.2015, p. 252-257.

Research output: Contribution to journalConference article

Griffini, D, Salvadori, S, Carnevale, M, Cappelletti, A, Ottanelli, L & Martelli, F 2015, 'On the development of an efficient regenerative compressor', Energy Procedia, vol. 82, pp. 252-257. https://doi.org/10.1016/j.egypro.2015.12.030
Griffini D, Salvadori S, Carnevale M, Cappelletti A, Ottanelli L, Martelli F. On the development of an efficient regenerative compressor. Energy Procedia. 2015 Dec;82:252-257. https://doi.org/10.1016/j.egypro.2015.12.030
Griffini, D. ; Salvadori, S. ; Carnevale, M. ; Cappelletti, A. ; Ottanelli, L. ; Martelli, F. / On the development of an efficient regenerative compressor. In: Energy Procedia. 2015 ; Vol. 82. pp. 252-257.
@article{e15804b4138a41cab8431ef93ccfc9b0,
title = "On the development of an efficient regenerative compressor",
abstract = "Regenerative compressors are attractive machines used in several industrial processes. Their main characteristic is the highly three-dimensional development of the flow. Consequently, usual approach for axial or centrifugal compressors design are not an affordable strategy. The analysis of the rotor/stator coupling is the main issue in the design of regenerative compressors because of the vane-less nature of the stator and the characteristic trajectory of the flow. This paper describes the design of an efficient regenerative compressor based on a highly detailed Reynolds Averaged Navier-Stokes (RANS) analysis. The targets of the activity are defined in terms of expected mass-flow, pressure rise and compressor efficiency, and then a preliminary design is performed using an in-house mono-dimensional tool based on simplified assumptions for the nominal operating conditions. Once the model provided the most promising geometrical characteristics for the target operating point, three-dimensional steady RANS analyses are performed to evaluate the actual performance of the compressor for a wide range of mass-flow values. Special attention has been paid to the generation of the computational mesh and a specific solution for the rotor row has been developed. Compressibility effects are non-negligible since the flow Mach number is higher than 0.5 in several compressor sections, including the leakage zone regions where the losses are higher. The rotor and the full compressor efficiencies are evaluated and discussed to underline the importance of the rotor/volute coupling. The flow behaviour inside of the volute as well as the distribution of losses is also discussed and some guidelines for the efficient design of regenerative compressors are presented.",
keywords = "CFD, Efficiency, Grid generation, Regenerative compressors",
author = "D. Griffini and S. Salvadori and M. Carnevale and A. Cappelletti and L. Ottanelli and F. Martelli",
year = "2015",
month = "12",
doi = "10.1016/j.egypro.2015.12.030",
language = "English",
volume = "82",
pages = "252--257",
journal = "Energy Procedia",
issn = "1876-6102",
publisher = "Elsevier",

}

TY - JOUR

T1 - On the development of an efficient regenerative compressor

AU - Griffini, D.

AU - Salvadori, S.

AU - Carnevale, M.

AU - Cappelletti, A.

AU - Ottanelli, L.

AU - Martelli, F.

PY - 2015/12

Y1 - 2015/12

N2 - Regenerative compressors are attractive machines used in several industrial processes. Their main characteristic is the highly three-dimensional development of the flow. Consequently, usual approach for axial or centrifugal compressors design are not an affordable strategy. The analysis of the rotor/stator coupling is the main issue in the design of regenerative compressors because of the vane-less nature of the stator and the characteristic trajectory of the flow. This paper describes the design of an efficient regenerative compressor based on a highly detailed Reynolds Averaged Navier-Stokes (RANS) analysis. The targets of the activity are defined in terms of expected mass-flow, pressure rise and compressor efficiency, and then a preliminary design is performed using an in-house mono-dimensional tool based on simplified assumptions for the nominal operating conditions. Once the model provided the most promising geometrical characteristics for the target operating point, three-dimensional steady RANS analyses are performed to evaluate the actual performance of the compressor for a wide range of mass-flow values. Special attention has been paid to the generation of the computational mesh and a specific solution for the rotor row has been developed. Compressibility effects are non-negligible since the flow Mach number is higher than 0.5 in several compressor sections, including the leakage zone regions where the losses are higher. The rotor and the full compressor efficiencies are evaluated and discussed to underline the importance of the rotor/volute coupling. The flow behaviour inside of the volute as well as the distribution of losses is also discussed and some guidelines for the efficient design of regenerative compressors are presented.

AB - Regenerative compressors are attractive machines used in several industrial processes. Their main characteristic is the highly three-dimensional development of the flow. Consequently, usual approach for axial or centrifugal compressors design are not an affordable strategy. The analysis of the rotor/stator coupling is the main issue in the design of regenerative compressors because of the vane-less nature of the stator and the characteristic trajectory of the flow. This paper describes the design of an efficient regenerative compressor based on a highly detailed Reynolds Averaged Navier-Stokes (RANS) analysis. The targets of the activity are defined in terms of expected mass-flow, pressure rise and compressor efficiency, and then a preliminary design is performed using an in-house mono-dimensional tool based on simplified assumptions for the nominal operating conditions. Once the model provided the most promising geometrical characteristics for the target operating point, three-dimensional steady RANS analyses are performed to evaluate the actual performance of the compressor for a wide range of mass-flow values. Special attention has been paid to the generation of the computational mesh and a specific solution for the rotor row has been developed. Compressibility effects are non-negligible since the flow Mach number is higher than 0.5 in several compressor sections, including the leakage zone regions where the losses are higher. The rotor and the full compressor efficiencies are evaluated and discussed to underline the importance of the rotor/volute coupling. The flow behaviour inside of the volute as well as the distribution of losses is also discussed and some guidelines for the efficient design of regenerative compressors are presented.

KW - CFD

KW - Efficiency

KW - Grid generation

KW - Regenerative compressors

UR - http://www.scopus.com/inward/record.url?scp=84960897768&partnerID=8YFLogxK

U2 - 10.1016/j.egypro.2015.12.030

DO - 10.1016/j.egypro.2015.12.030

M3 - Conference article

VL - 82

SP - 252

EP - 257

JO - Energy Procedia

JF - Energy Procedia

SN - 1876-6102

ER -