Experimental investigation of pressure loss and heat transfer in a rotor-stator cavity with two outlets

X. Luo, G. Han, H. Wu, L. Wang, G. Xu

Research output: Contribution to journalArticle

Abstract

This article presented detailed measurements of the pressure distribution and heat transfer in a rotor-stator cavity with inlet of orifices on the rotating disk and two outlets at both low radius and high radius. Transient thermochromic liquid crystal (TLC) technique was employed to determine the convective heat transfer characteristics on the test surface of the rotating disk. Rotational Reynolds numbers (Re-phi) ranging from 4.9 x 10(5) to 2.47 x 10(6) and dimensionless flow rate (C-w) between 6.9 x 10(3) and 2.72 x 10(4) were considered. Experimental results indicated that the characteristics of the pressure loss coefficient between the inlet and the outlet was strongly dependent on the Re-phi, and C-w. Under the current operating conditions, the heat transfer on the surface of the rotating disk was weakened at both in the upper and lower edges for the case of r/R = 0.775 due to the existence of the recirculation. Whereas the heat transfer were enhanced near the upper radius with relatively low flow rate and high rotational speed, as well as on the middle radius with relatively high flow rate and low rotational speed.
Original languageEnglish
Pages (from-to)311-320
JournalInternational Journal of Heat and Mass Transfer
Volume78
DOIs
Publication statusPublished - Nov 2014

Keywords

  • Heat transfer
  • Pressure loss
  • Thermochromic liquid crystal
  • Rotor-stator cavity
  • Rotational Reynolds number

Cite this

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title = "Experimental investigation of pressure loss and heat transfer in a rotor-stator cavity with two outlets",
abstract = "This article presented detailed measurements of the pressure distribution and heat transfer in a rotor-stator cavity with inlet of orifices on the rotating disk and two outlets at both low radius and high radius. Transient thermochromic liquid crystal (TLC) technique was employed to determine the convective heat transfer characteristics on the test surface of the rotating disk. Rotational Reynolds numbers (Re-phi) ranging from 4.9 x 10(5) to 2.47 x 10(6) and dimensionless flow rate (C-w) between 6.9 x 10(3) and 2.72 x 10(4) were considered. Experimental results indicated that the characteristics of the pressure loss coefficient between the inlet and the outlet was strongly dependent on the Re-phi, and C-w. Under the current operating conditions, the heat transfer on the surface of the rotating disk was weakened at both in the upper and lower edges for the case of r/R = 0.775 due to the existence of the recirculation. Whereas the heat transfer were enhanced near the upper radius with relatively low flow rate and high rotational speed, as well as on the middle radius with relatively high flow rate and low rotational speed.",
keywords = "Heat transfer, Pressure loss, Thermochromic liquid crystal, Rotor-stator cavity, Rotational Reynolds number",
author = "X. Luo and G. Han and H. Wu and L. Wang and G. Xu",
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month = "11",
doi = "10.1016/j.ijheatmasstransfer.2014.06.057",
language = "English",
volume = "78",
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Experimental investigation of pressure loss and heat transfer in a rotor-stator cavity with two outlets. / Luo, X.; Han, G.; Wu, H.; Wang, L.; Xu, G.

In: International Journal of Heat and Mass Transfer, Vol. 78, 11.2014, p. 311-320.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental investigation of pressure loss and heat transfer in a rotor-stator cavity with two outlets

AU - Luo, X.

AU - Han, G.

AU - Wu, H.

AU - Wang, L.

AU - Xu, G.

PY - 2014/11

Y1 - 2014/11

N2 - This article presented detailed measurements of the pressure distribution and heat transfer in a rotor-stator cavity with inlet of orifices on the rotating disk and two outlets at both low radius and high radius. Transient thermochromic liquid crystal (TLC) technique was employed to determine the convective heat transfer characteristics on the test surface of the rotating disk. Rotational Reynolds numbers (Re-phi) ranging from 4.9 x 10(5) to 2.47 x 10(6) and dimensionless flow rate (C-w) between 6.9 x 10(3) and 2.72 x 10(4) were considered. Experimental results indicated that the characteristics of the pressure loss coefficient between the inlet and the outlet was strongly dependent on the Re-phi, and C-w. Under the current operating conditions, the heat transfer on the surface of the rotating disk was weakened at both in the upper and lower edges for the case of r/R = 0.775 due to the existence of the recirculation. Whereas the heat transfer were enhanced near the upper radius with relatively low flow rate and high rotational speed, as well as on the middle radius with relatively high flow rate and low rotational speed.

AB - This article presented detailed measurements of the pressure distribution and heat transfer in a rotor-stator cavity with inlet of orifices on the rotating disk and two outlets at both low radius and high radius. Transient thermochromic liquid crystal (TLC) technique was employed to determine the convective heat transfer characteristics on the test surface of the rotating disk. Rotational Reynolds numbers (Re-phi) ranging from 4.9 x 10(5) to 2.47 x 10(6) and dimensionless flow rate (C-w) between 6.9 x 10(3) and 2.72 x 10(4) were considered. Experimental results indicated that the characteristics of the pressure loss coefficient between the inlet and the outlet was strongly dependent on the Re-phi, and C-w. Under the current operating conditions, the heat transfer on the surface of the rotating disk was weakened at both in the upper and lower edges for the case of r/R = 0.775 due to the existence of the recirculation. Whereas the heat transfer were enhanced near the upper radius with relatively low flow rate and high rotational speed, as well as on the middle radius with relatively high flow rate and low rotational speed.

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KW - Pressure loss

KW - Thermochromic liquid crystal

KW - Rotor-stator cavity

KW - Rotational Reynolds number

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