1-20 of 96
Keyword: flow separation
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031019.
Published Online: July 15, 2011
... 2011 15 07 2011 blades boundary layer turbulence bubbles flow instability flow separation laminar flow plates (structures) Although modern gas-turbine engines are highly developed, small improvements in performance can still yield significant economic benefits. Since the...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031009.
Published Online: July 14, 2011
... blade profile. 22 08 2008 26 06 2009 14 07 2011 14 07 2011 blades bubbles flow control flow instability flow separation gas turbines jets wakes With the trend toward higher bypass ratios in turbofans, demands are increasing for the low pressure turbines (LPTs...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021017.
Published Online: June 29, 2011
... profile has a strong effect on the position of flow separation, whereby a hub-strong profile tends to separate at the casing and the tip-strong profile on the hub. Steady computational fluid dynamics (CFD) simulations using the shear stress transport (SST) turbulence model have been carried out based on...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011023.
Published Online: June 1, 2011
... geometries where the boundary layers are not able to withstand the strong adverse pressure gradient, which results in flow separation. This paper describes the flow through a fully separated duct as a baseline configuration. In a next step the influence of passive flow control devices onto this separation...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011020.
Published Online: May 31, 2011
... the aerodynamic blade loading. For transonic profiles, this leads to very high velocities on the suction side and shock induced separation is likely to occur. The total pressure loss increase due to flow separation and strong shocks, as well as the underturning of the flow, limits the increase of the...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041021.
Published Online: April 25, 2011
... boundary layers bubbles flow control flow separation flow simulation jets turbines vortices Boundary layer separation can lead to partial loss of lift and higher aerodynamic losses on low-pressure turbine (LPT) airfoils (e.g., Refs. 1 2 3 ). As designers impose higher loading to improve...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041016.
Published Online: April 21, 2011
...Xinqian Zheng; Yangjun Zhang; Weidong Xing; Junyue Zhang Flow separation control was investigated on a compressor cascade using three types of fluidic-based excitations: steady suction, steady blowing, and synthetic jet. By solving unsteady Reynolds–averaged Navier–Stokes equations, the effect of...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031012.
Published Online: November 15, 2010
... effects on more complex geometries. 13 08 2009 16 10 2009 15 11 2010 15 11 2010 blades boundary layers computational fluid dynamics flow separation flow simulation geometry laminar to turbulent transitions turbines turbulence The flowfield found in low pressure...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021019.
Published Online: October 25, 2010
...Reinaldo A. Gomes; Reinhard Niehuis Film cooling experiments were performed using a highly loaded high pressure turbine blade blade linear cascade. A large region with main flow separation is found on the pressure side and film cooling is provided into this area with three rows of either...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2010, 132(4): 041006.
Published Online: April 27, 2010
... 2010 27 04 2010 bars blades boundary layer turbulence bubbles diffusion flow separation laser Doppler anemometry plates (structures) turbines wakes The flow inside turbomachinery turbine blade passages is inherently unsteady. Each blade row sheds turbulent wakes, which...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2010, 132(3): 031003.
Published Online: March 24, 2010
... the film coolant being bypassed from the pressure side to the suction side. 14 07 2008 09 03 2009 24 03 2010 24 03 2010 aerospace components aerospace engines aerospace industry blades bubbles cooling flow separation flow simulation lightweight structures liquid...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2010, 132(2): 021004.
Published Online: January 11, 2010
... appears to capture all of the relevant physics for both engineered and service-related (e.g., wear or environmentally induced) roughness. Roughness influences engine performance by causing earlier boundary layer transition, increased boundary layer momentum loss (i.e., thickness), and/or flow separation...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2010, 132(1): 011014.
Published Online: September 17, 2009
... computational fluid dynamics fans flow instability flow separation transonic flow vortices wakes As part of an ongoing effort to increase stage loading and efficiency, the Air Force Research Laboratory (AFRL), Compressor Aero Research Laboratory (CARL), has been conducting experimental and...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2010, 132(1): 011011.
Published Online: September 17, 2009
... that it can be used to safely increase the size of the design space in which aeroengine duct designers can operate. 01 09 2008 17 12 2008 17 09 2009 aerospace engines compressors flow separation geometry optimisation pipe flow In aeroengines, an S-shaped annular duct...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2010, 132(1): 011007.
Published Online: September 16, 2009
... layer turbulence bubbles flow measurement flow separation turbines wind tunnels Boundary layer separation can lead to partial loss of lift and higher aerodynamic losses on low-pressure turbine (LPT) airfoils (e.g., Refs. 1 2 3 ). As designers impose higher loading to improve efficiency...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2010, 132(1): 011004.
Published Online: September 11, 2009
.... 12 06 2007 03 08 2007 11 09 2009 boundary layers bubbles flow instability flow separation laminar flow turbulence vortices Separation bubbles are a common occurrence over airfoils at low Reynolds numbers, particularly over airfoils that develop high levels of lift...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041012.
Published Online: July 6, 2009
... costs associated with unsteady calculations must be accepted in order to increase the understanding of the physical flow phenomena in turbine exit flow and its interaction with the downstream diffuser. 22 08 2008 16 10 2008 06 07 2009 flow separation turbines turbulence wakes...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041013.
Published Online: July 6, 2009
... 2008 06 07 2009 aerodynamics aerospace components blades boundary layer turbulence bubbles compressors computational fluid dynamics flow measurement flow separation laminar flow pressure measurement stators wakes 2007 IGTI Best Technical Paper The leading-edge...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2009, 131(2): 021019.
Published Online: February 3, 2009
... measurement flow separation jets turbines turbulence velocity measurement wakes Low-pressure turbine (LPT) blades have been shown to be susceptible to boundary layer separation at low Reynolds numbers ( 1 2 3 ). Many techniques have been developed to decrease the extent of the separation in an...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2009, 131(2): 021013.
Published Online: January 29, 2009
... control flow separation flow simulation rotors compressor tip leakage flow casing treatment groove slots The prediction of the surge line position is a key parameter for the design of compressors. Rotating stall and surge have been studied for 50 years ( 1 ) but the basic mechanisms...