Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Investigation of a nozzle guide vane cooling characteristic under one engine inoperative conditions

Du, Kun LU ; Liang, Tingrui ; Chen, Qihao ; Liu, Cunliang and Sunden, Bengt LU (2024) In International Journal of Heat and Fluid Flow 106.
Abstract

The film cooling characteristics of turboshaft engine vanes were studied under one engine inoperative (OEI) conditions. Variations in the operating conditions caused tremendous changes in Reynolds number (Reg), turbulence intensity (Tu) and swirling inflow of the mainstream. Therefore, pressure-sensitive paint (PSP), as a promising measuring technique, was adopted for analyzing the impacts of Reg and Tu on the vane film cooling effectiveness. Furthermore, numerical methods were utilized to explore the film cooling effectiveness of vanes with two different hole shapes under various swirling inflow conditions. The results indicated that enhancement in either Tu or the swirling inflow decreased the film cooling... (More)

The film cooling characteristics of turboshaft engine vanes were studied under one engine inoperative (OEI) conditions. Variations in the operating conditions caused tremendous changes in Reynolds number (Reg), turbulence intensity (Tu) and swirling inflow of the mainstream. Therefore, pressure-sensitive paint (PSP), as a promising measuring technique, was adopted for analyzing the impacts of Reg and Tu on the vane film cooling effectiveness. Furthermore, numerical methods were utilized to explore the film cooling effectiveness of vanes with two different hole shapes under various swirling inflow conditions. The results indicated that enhancement in either Tu or the swirling inflow decreased the film cooling effectiveness. However, Reg had little effect on the film cooling performance within the studied range. The area-averaged film cooling effectiveness decreased by 5.6% when Tu increased from 15% to 30%. In addition, the vane film cooling performance was greatly impacted by swirling inflow. The film cooling effectiveness exhibited continuous decreases as the swirling angle (SA) increased, especially for the vane with shaped holes; its maximum area-averaged film cooling effectiveness reduction was 28.9%. Overall, OEI conditions mainly altered the Tu and swirling inflow, thus changing the aerothermal performance, while Reg remained relatively unchanged in this research. The present research aimed to contribute to designing the turbine cooling under OEI conditions.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Film cooling, One engine inoperative conditions, Pressure-sensitive paint technique, Swirling inflow
in
International Journal of Heat and Fluid Flow
volume
106
article number
109304
publisher
Elsevier
external identifiers
  • scopus:85184025686
ISSN
0142-727X
DOI
10.1016/j.ijheatfluidflow.2024.109304
language
English
LU publication?
yes
id
68968c3c-ce2c-4bb3-b5ff-2a9a9342a23f
date added to LUP
2024-03-05 12:16:56
date last changed
2024-03-05 12:19:35
@article{68968c3c-ce2c-4bb3-b5ff-2a9a9342a23f,
  abstract     = {{<p>The film cooling characteristics of turboshaft engine vanes were studied under one engine inoperative (OEI) conditions. Variations in the operating conditions caused tremendous changes in Reynolds number (Re<sub>g</sub>), turbulence intensity (Tu) and swirling inflow of the mainstream. Therefore, pressure-sensitive paint (PSP), as a promising measuring technique, was adopted for analyzing the impacts of Re<sub>g</sub> and Tu on the vane film cooling effectiveness. Furthermore, numerical methods were utilized to explore the film cooling effectiveness of vanes with two different hole shapes under various swirling inflow conditions. The results indicated that enhancement in either Tu or the swirling inflow decreased the film cooling effectiveness. However, Re<sub>g</sub> had little effect on the film cooling performance within the studied range. The area-averaged film cooling effectiveness decreased by 5.6% when Tu increased from 15% to 30%. In addition, the vane film cooling performance was greatly impacted by swirling inflow. The film cooling effectiveness exhibited continuous decreases as the swirling angle (SA) increased, especially for the vane with shaped holes; its maximum area-averaged film cooling effectiveness reduction was 28.9%. Overall, OEI conditions mainly altered the Tu and swirling inflow, thus changing the aerothermal performance, while Re<sub>g</sub> remained relatively unchanged in this research. The present research aimed to contribute to designing the turbine cooling under OEI conditions.</p>}},
  author       = {{Du, Kun and Liang, Tingrui and Chen, Qihao and Liu, Cunliang and Sunden, Bengt}},
  issn         = {{0142-727X}},
  keywords     = {{Film cooling; One engine inoperative conditions; Pressure-sensitive paint technique; Swirling inflow}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{International Journal of Heat and Fluid Flow}},
  title        = {{Investigation of a nozzle guide vane cooling characteristic under one engine inoperative conditions}},
  url          = {{http://dx.doi.org/10.1016/j.ijheatfluidflow.2024.109304}},
  doi          = {{10.1016/j.ijheatfluidflow.2024.109304}},
  volume       = {{106}},
  year         = {{2024}},
}