TU Darmstadt / ULB / TUbiblio

Endoscopic PIV Measurements in a Low Pressure Turbine Rig

Kegalj, Martin and Schiffer, Heinz-Peter (2008):
Endoscopic PIV Measurements in a Low Pressure Turbine Rig.
In: 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 07-10 July 2008, [Conference or Workshop Item]

Abstract

The Particle-Image-Velocimetry (PIV) has become a useful approach to acquire information on the flow in turbomachinery. Several premises have to be fulfilled to achieve high-quality data, e.g. optical access, low vibrations, low reflections and so on. But not every test facility complies with these requirements, a suitable casing is very important for the use of PIV. If there is no optical access to the test area, measurements cannot be performed. The use of borescopic optics is a possible approach to this issue, since the access can be very small (in this case ø = 8 mm). To reduce reflections in the measurement area fluorescent paint can be used. To acquire velocity information in the 3 components of space, several test setups like Stereo-PIV, Dual- Plane PIV, Holographic PIV and Tomographic PIV can be chosen. But these techniques require either large optical accesses from different viewing angles or very complex test setups. Different light sheet orientations in combination with borescopic optics using the Planar PIV can deliver sufficient information of the flow. This study will show the feasibility of such an approach in an enclosed test area like the interblade space in a Low-Pressure-Turbine-Rig. The results from PIV will be compared with data collected with conventional techniques like the Five-Hole-Probe and the 2-component Hot-Wire-Anemometry. An analysis of time- and phase-averaged data will be performed.

Item Type: Conference or Workshop Item
Erschienen: 2008
Creators: Kegalj, Martin and Schiffer, Heinz-Peter
Title: Endoscopic PIV Measurements in a Low Pressure Turbine Rig
Language: English
Abstract:

The Particle-Image-Velocimetry (PIV) has become a useful approach to acquire information on the flow in turbomachinery. Several premises have to be fulfilled to achieve high-quality data, e.g. optical access, low vibrations, low reflections and so on. But not every test facility complies with these requirements, a suitable casing is very important for the use of PIV. If there is no optical access to the test area, measurements cannot be performed. The use of borescopic optics is a possible approach to this issue, since the access can be very small (in this case ø = 8 mm). To reduce reflections in the measurement area fluorescent paint can be used. To acquire velocity information in the 3 components of space, several test setups like Stereo-PIV, Dual- Plane PIV, Holographic PIV and Tomographic PIV can be chosen. But these techniques require either large optical accesses from different viewing angles or very complex test setups. Different light sheet orientations in combination with borescopic optics using the Planar PIV can deliver sufficient information of the flow. This study will show the feasibility of such an approach in an enclosed test area like the interblade space in a Low-Pressure-Turbine-Rig. The results from PIV will be compared with data collected with conventional techniques like the Five-Hole-Probe and the 2-component Hot-Wire-Anemometry. An analysis of time- and phase-averaged data will be performed.

Uncontrolled Keywords: PIV
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute of Gas Turbines and Aerospace Propulsion (GLR)
Event Title: 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location: Lisbon, Portugal
Event Dates: 07-10 July 2008
Date Deposited: 16 Apr 2018 14:49
Identification Number: Paper #1233
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)

View Item View Item