Advanced

Parametric influence on convective heat transfer for an outlet guide vane

Luo, Lei; Wang, Chenglong LU ; Wang, Lei LU ; Sundén, Bengt LU and Wang, Songtao (2016) In Numerical Heat Transfer; Part A: Applications 70(4). p.331-346
Abstract

Improved understanding of the impact of the operating conditions on the heat transfer and fluid flow behaviors of an outlet guide vane (OGV) is essential for accurate prediction of the lifetime of jet engines. In this article, the heat transfer characteristics of an OGV at various Reynolds numbers (Re), free stream turbulence levels, Mach number (Ma), and surface roughness are studied numerically. The Re is kept at 300,000 and 450,000, respectively, the free stream turbulence intensity ranges from 3.2% to 13%, and the turbulent length scale is varied from 1.2 to 11 mm. The Ma is selected as 0.06, 0.25, and 0.35, and the sandy grain roughness height is increased from the smooth wall level up to 160 µm. Mid-span pressure coefficient and... (More)

Improved understanding of the impact of the operating conditions on the heat transfer and fluid flow behaviors of an outlet guide vane (OGV) is essential for accurate prediction of the lifetime of jet engines. In this article, the heat transfer characteristics of an OGV at various Reynolds numbers (Re), free stream turbulence levels, Mach number (Ma), and surface roughness are studied numerically. The Re is kept at 300,000 and 450,000, respectively, the free stream turbulence intensity ranges from 3.2% to 13%, and the turbulent length scale is varied from 1.2 to 11 mm. The Ma is selected as 0.06, 0.25, and 0.35, and the sandy grain roughness height is increased from the smooth wall level up to 160 µm. Mid-span pressure coefficient and Nu distributions are presented. Basically, the heat transfer patterns and pressure profiles are weak functions of the Re and Ma. Increasing the Re slightly moves the transition position upstream, while the Ma has no effect on the transition process. On the suction side, the transition is induced by flow separation and a bump is visible in the pressure profile. However, the turbulence intensity, turbulence length scale, and surface roughness levels have significant effects on the heat transfer and pressure distributions. On the suction side, the bump is invisible and the “separation-induced transition” is replaced by the “by pass transition”. It is also found that the transition position moves upstream as the turbulence intensity, length scale, and roughness level increase.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer; Part A: Applications
volume
70
issue
4
pages
16 pages
publisher
Taylor & Francis
external identifiers
  • scopus:84978538403
  • wos:000380742500001
ISSN
1040-7782
DOI
10.1080/10407782.2016.1173492
language
English
LU publication?
yes
id
4afb180c-fa4d-4a94-aa9a-0f59f4eb20ce
date added to LUP
2016-12-06 08:42:42
date last changed
2017-09-24 05:04:10
@article{4afb180c-fa4d-4a94-aa9a-0f59f4eb20ce,
  abstract     = {<p>Improved understanding of the impact of the operating conditions on the heat transfer and fluid flow behaviors of an outlet guide vane (OGV) is essential for accurate prediction of the lifetime of jet engines. In this article, the heat transfer characteristics of an OGV at various Reynolds numbers (Re), free stream turbulence levels, Mach number (Ma), and surface roughness are studied numerically. The Re is kept at 300,000 and 450,000, respectively, the free stream turbulence intensity ranges from 3.2% to 13%, and the turbulent length scale is varied from 1.2 to 11 mm. The Ma is selected as 0.06, 0.25, and 0.35, and the sandy grain roughness height is increased from the smooth wall level up to 160 µm. Mid-span pressure coefficient and Nu distributions are presented. Basically, the heat transfer patterns and pressure profiles are weak functions of the Re and Ma. Increasing the Re slightly moves the transition position upstream, while the Ma has no effect on the transition process. On the suction side, the transition is induced by flow separation and a bump is visible in the pressure profile. However, the turbulence intensity, turbulence length scale, and surface roughness levels have significant effects on the heat transfer and pressure distributions. On the suction side, the bump is invisible and the “separation-induced transition” is replaced by the “by pass transition”. It is also found that the transition position moves upstream as the turbulence intensity, length scale, and roughness level increase.</p>},
  author       = {Luo, Lei and Wang, Chenglong and Wang, Lei and Sundén, Bengt and Wang, Songtao},
  issn         = {1040-7782},
  language     = {eng},
  month        = {08},
  number       = {4},
  pages        = {331--346},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer; Part A: Applications},
  title        = {Parametric influence on convective heat transfer for an outlet guide vane},
  url          = {http://dx.doi.org/10.1080/10407782.2016.1173492},
  volume       = {70},
  year         = {2016},
}