Matzgeller, Roland and Voges, Melanie and Schroll, Michael (2011) INVESTIGATION OF UNSTEADY COMPRESSOR FLOW STRUCTURE WITH TIP INJECTION USING PARTICLE IMAGE VELOCIMETRY. In: Proceedings of ASME Turbo Expo 2011. ASME Turbo Expo 2011: Power for Land, Sea and Air, 6.-10. Juni 2011, Vancouver, Canada.
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Fluid injection at the tip of highly loaded compressor rotors is known to be very effective in suppressing the onset of rotating stall and eventually compressor instability. To understand the effects of tip injection, the flow field at the tip region of a transonic compressor rotor with and without fluid injection was investigated in this paper. Using results acquired by phase-locked PIV measurements as well as the static pressure field obtained by fast response pressure transducers, the unsteady interaction between the injection jet and the rotor could be described thoroughly. Both, an influence of the rotor’s flow field on the jet as well of the jet on the rotor was clearly visible. Since unsteady inflow conditions to the front rotor in the relative frame of reference were imposed by the injection jets, the rotor’s unsteady response was investigated by inspection of the position of the tip leakage vortex trajectory. It could be shown that due to a short time for the flow to adapt at the rotor’s leading edge, its position didn’t change distinctly. Because a significantly longer time was needed for the overall passage flow to adapt, it was concluded that this causes the beneficial effect of tip injection.
|Document Type:||Conference or Workshop Item (Speech, Paper)|
|Title:||INVESTIGATION OF UNSTEADY COMPRESSOR FLOW STRUCTURE WITH TIP INJECTION USING PARTICLE IMAGE VELOCIMETRY|
|Journal or Publication Title:||Proceedings of ASME Turbo Expo 2011|
|In ISI Web of Science:||No|
|Keywords:||compressor, tip injection, PIV, unsteady|
|Event Title:||ASME Turbo Expo 2011: Power for Land, Sea and Air|
|Event Location:||Vancouver, Canada|
|Event Type:||international Conference|
|Event Dates:||6.-10. Juni 2011|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Propulsion Systems|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Virtual Engine and Validation Methods|
|Institutes and Institutions:||Institute of Propulsion Technology > Engine Measurement Systems|
|Deposited By:||Melanie Voges|
|Deposited On:||19 Jan 2012 11:07|
|Last Modified:||19 Jan 2012 11:07|
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