Skapa referens, olika format (klipp och klistra)
Harvard
Nilsson, P. (2016) A Study on the Impact of Blade Tolerances on Turbine Performance. Göteborg : Chalmers University of Technology (Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, nr: 2016:81).
BibTeX
@mastersthesis{
Nilsson2016,
author={Nilsson, Patrick},
title={A Study on the Impact of Blade Tolerances on Turbine Performance},
abstract={When manufacturing blades, there is a need for tolerancing around nominal blade design. Tolerance
design is a balance between turbine performance and cost efficiency; a tolerance band
that is too wide will result in a large scatter in turbine characteristics, whereas a too narrow
tolerance band leads to high manufacturing costs due to high scrap rates of blades not meeting
requirements. Determining an optimal manufacturing tolerance is therefore an issue of great
importance. The purpose of this thesis was to study the impact of geometric variability within
manufacturing tolerances on turbine performance.
This Master’s Thesis was conducted at the Department of Rotors at GKN Aerospace in Trollhättan,
Sweden. In this thesis, a rational method has been developed to vary blade profiles of
both stator and rotor blades within current manufacturing tolerances at GKN Aerospace. Blade
profiles are modified using a sinusoidal profile variation, which allows variation of amplitude
Ai, period ni, and phase angle 'i, to model manufacturing variations within profile tolerance
limits. The method has been utilised to study the impact of simulated manufacturing tolerances
on turbine performance through CFD simulations. Several design cases were produced
by variations of the function used to produce sinusoidal profile variations, and evaluated in the
project. It was seen that limiting curves for flow function Q were characterised by stator-rotor
configurations for minimum-minimum and maximum-maximum profile tolerance, while limiting
curves for efficiency where characterised by stator-rotor configurations for minimum-maximum
and maximum-minimum profile tolerances. The impact of subsequent design cases for profile
variations within manufacturing tolerances fell within these limiting curves. Certain blade design
parameters, such as trailing edge thickness and unguided trailing edge, were identified as
key parameters with respect to impact on turbine performance.},
publisher={Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola},
place={Göteborg},
year={2016},
series={Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2016:81},
keywords={ tolerancing, tolerance optimisation, robust design, blade design, turbine performance, optimisation, profile variation, geometric variability, manufacturing tolerances},
}
RefWorks
RT Generic
SR Electronic
ID 245808
A1 Nilsson, Patrick
T1 A Study on the Impact of Blade Tolerances on Turbine Performance
YR 2016
AB When manufacturing blades, there is a need for tolerancing around nominal blade design. Tolerance
design is a balance between turbine performance and cost efficiency; a tolerance band
that is too wide will result in a large scatter in turbine characteristics, whereas a too narrow
tolerance band leads to high manufacturing costs due to high scrap rates of blades not meeting
requirements. Determining an optimal manufacturing tolerance is therefore an issue of great
importance. The purpose of this thesis was to study the impact of geometric variability within
manufacturing tolerances on turbine performance.
This Master’s Thesis was conducted at the Department of Rotors at GKN Aerospace in Trollhättan,
Sweden. In this thesis, a rational method has been developed to vary blade profiles of
both stator and rotor blades within current manufacturing tolerances at GKN Aerospace. Blade
profiles are modified using a sinusoidal profile variation, which allows variation of amplitude
Ai, period ni, and phase angle 'i, to model manufacturing variations within profile tolerance
limits. The method has been utilised to study the impact of simulated manufacturing tolerances
on turbine performance through CFD simulations. Several design cases were produced
by variations of the function used to produce sinusoidal profile variations, and evaluated in the
project. It was seen that limiting curves for flow function Q were characterised by stator-rotor
configurations for minimum-minimum and maximum-maximum profile tolerance, while limiting
curves for efficiency where characterised by stator-rotor configurations for minimum-maximum
and maximum-minimum profile tolerances. The impact of subsequent design cases for profile
variations within manufacturing tolerances fell within these limiting curves. Certain blade design
parameters, such as trailing edge thickness and unguided trailing edge, were identified as
key parameters with respect to impact on turbine performance.
PB Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola,
T3 Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2016:81
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/245808/245808.pdf
OL 30
