elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Slot Influence in Boundary Layer Suction for Secondary flow control in a High Speed Compressor Cascade

Liesner, K and Meyer, R. and Gmelin, Chr. and Thiele, F. (2012) Slot Influence in Boundary Layer Suction for Secondary flow control in a High Speed Compressor Cascade. In: Proceedings of the XX Fluid Mechanics Conference KKMP 2012. XX Fluid Mechanics Conference KKMP2012, 17.09. - 20.09.2012, Gliwice, Poland.

Full text not available from this repository.

Abstract

A numerical and experimental study is presented in order to clarify more the influence of a suction slot design with respect to mass flow rate and slot area in a compressor with active flow control for secondary loss diminution. While the numerical simulations unveil no influence of the shape at constant mass flow rates, the experimental investigations show such a dependency of the suction efeficiency. For the study a suction slot in side walls has been examined, the peacock slot in the junction between vane suction side and side wall at 50% to 100% chord, with a slot width of 0.6mm, 1mm and 2mm. The parameter study has in part been done numerically; the paper concentrates on the comparison with the experimental results at Mach number 0.67 and Reynolds number of 560.000. This experimental study shows the dependency of the efficiency of the cascade with the mass flow and the slot width, respectively. Both parameters can be varied independently. It is shown that the slot width has a remarkable influence on the efficiency. With larger slot widths, the mass flow rate can be increased. While a slot width of 0.6mm allows for only about 2% of the main mass flow to be sucked from the cascade, with a slot width of 2mm more than 5% of the main mass flow can be drawn off the compressor. An increased suction rate in combination with an appropriate slot design decreases the total pressure loss, as soon as the suction rate is high enough to guarantee a constant suction mass flow in the slot. Otherwise, a recirculation appears that destroys the effect of the flow suction.

Item URL in elib:https://elib.dlr.de/80210/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Slot Influence in Boundary Layer Suction for Secondary flow control in a High Speed Compressor Cascade
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liesner, KUNSPECIFIEDUNSPECIFIED
Meyer, R.UNSPECIFIEDUNSPECIFIED
Gmelin, Chr.Institut für Strömungsmechanik und Technische Akustik, Technische Universität BerlinUNSPECIFIED
Thiele, F.Institut für Strömungsmechanik und Technische Akustik, Technische Universität BerlinUNSPECIFIED
Date:2012
Journal or Publication Title:Proceedings of the XX Fluid Mechanics Conference KKMP 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:compressor cascade, secondary flow, active flow control, boundary layer suction
Event Title:XX Fluid Mechanics Conference KKMP2012
Event Location:Gliwice, Poland
Event Type:international Conference
Event Dates:17.09. - 20.09.2012
Organizer:Politechnika Slaska, Institut Maszyn i Urzadzen Energetycznych
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Kaur, Balbir
Deposited On:10 Jan 2013 12:02
Last Modified:10 Jan 2013 12:02

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.