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Étude des performances et optimisation de la conception de nouveaux compresseurs rotatifs à palettes coulissantes à cylindre rotatif

Gu, Huaduo LU ; Ye, Fanghua ; Chen, Yaping ; Wu, Jiafeng ; Li, Weihong and Sundén, Bengt LU (2022) In International Journal of Refrigeration 142. p.137-147
Abstract

Novel rotating-cylinder sliding vane rotary compressors (RC-SVRCs) are promising machines in energy conversion systems due to extremely low friction. However, three-dimensional visual investigations on geometrical optimizations of RC-SVRCs are highly limited. Besides, most flow mechanisms and leakage flow affected by geometric structures have not been fully revealed yet. Therefore, the sliding vane number, gap heights at vane tips and length-to-diameter ratio are numerically studied in this work. The results show that more sliding vanes (4∼12) lead to more uniform flow and temperature fields, lower mass flow rates and outlet temperature, less leakage between rotor and rotating cylinder. The mass flow rate, leakage mL1 between... (More)

Novel rotating-cylinder sliding vane rotary compressors (RC-SVRCs) are promising machines in energy conversion systems due to extremely low friction. However, three-dimensional visual investigations on geometrical optimizations of RC-SVRCs are highly limited. Besides, most flow mechanisms and leakage flow affected by geometric structures have not been fully revealed yet. Therefore, the sliding vane number, gap heights at vane tips and length-to-diameter ratio are numerically studied in this work. The results show that more sliding vanes (4∼12) lead to more uniform flow and temperature fields, lower mass flow rates and outlet temperature, less leakage between rotor and rotating cylinder. The mass flow rate, leakage mL1 between rotor and cylinder and leakage mL2 at vane tip of 8-sliding-vane scheme are 2.944 × 10−2, 9.949 × 10−4 and 3.692 × 10−5 kg·s−1, respectively. Gap height at vane tips has vital effects on flow fields. As the gap increases (0.01∼0.05 mm), mass flow rate and isentropic efficiency are decreased by 12.68% and 18.26%, the outlet temperature, leakage mL1 and mL2 are increased by 91.5 K, 69.60% and 22 times, respectively. High-temperature areas and leakage flow increase with the increase of cylinder length, which is recommended no longer than 0.6 diameters. This work allows making recommendations for designing RC-SVRCs.

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author
; ; ; ; and
organization
alternative title
Performance investigation and design optimization of novel rotating-cylinder sliding vane rotary compressors
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Comprehensive performance investigation, Design optimization, Flow mechanism, Numerical investigation, Rotating-cylinder sliding vane rotary compressor
in
International Journal of Refrigeration
volume
142
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:85135398265
ISSN
0140-7007
DOI
10.1016/j.ijrefrig.2022.06.009
language
French
LU publication?
yes
id
92249037-b020-467b-ba1b-2cb8009787a4
date added to LUP
2022-10-06 10:56:02
date last changed
2023-11-21 11:55:30
@article{92249037-b020-467b-ba1b-2cb8009787a4,
  abstract     = {{<p>Novel rotating-cylinder sliding vane rotary compressors (RC-SVRCs) are promising machines in energy conversion systems due to extremely low friction. However, three-dimensional visual investigations on geometrical optimizations of RC-SVRCs are highly limited. Besides, most flow mechanisms and leakage flow affected by geometric structures have not been fully revealed yet. Therefore, the sliding vane number, gap heights at vane tips and length-to-diameter ratio are numerically studied in this work. The results show that more sliding vanes (4∼12) lead to more uniform flow and temperature fields, lower mass flow rates and outlet temperature, less leakage between rotor and rotating cylinder. The mass flow rate, leakage m<sub>L1</sub> between rotor and cylinder and leakage m<sub>L2</sub> at vane tip of 8-sliding-vane scheme are 2.944 × 10<sup>−2</sup>, 9.949 × 10<sup>−4</sup> and 3.692 × 10<sup>−5</sup> kg·s<sup>−</sup><sup>1</sup>, respectively. Gap height at vane tips has vital effects on flow fields. As the gap increases (0.01∼0.05 mm), mass flow rate and isentropic efficiency are decreased by 12.68% and 18.26%, the outlet temperature, leakage m<sub>L1</sub> and m<sub>L2</sub> are increased by 91.5 K, 69.60% and 22 times, respectively. High-temperature areas and leakage flow increase with the increase of cylinder length, which is recommended no longer than 0.6 diameters. This work allows making recommendations for designing RC-SVRCs.</p>}},
  author       = {{Gu, Huaduo and Ye, Fanghua and Chen, Yaping and Wu, Jiafeng and Li, Weihong and Sundén, Bengt}},
  issn         = {{0140-7007}},
  keywords     = {{Comprehensive performance investigation; Design optimization; Flow mechanism; Numerical investigation; Rotating-cylinder sliding vane rotary compressor}},
  language     = {{fre}},
  pages        = {{137--147}},
  publisher    = {{Elsevier}},
  series       = {{International Journal of Refrigeration}},
  title        = {{Étude des performances et optimisation de la conception de nouveaux compresseurs rotatifs à palettes coulissantes à cylindre rotatif}},
  url          = {{http://dx.doi.org/10.1016/j.ijrefrig.2022.06.009}},
  doi          = {{10.1016/j.ijrefrig.2022.06.009}},
  volume       = {{142}},
  year         = {{2022}},
}