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Keywords: jet engines
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Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041003.
Published Online: July 19, 2011
... 01 2010 24 11 2010 19 07 2011 19 07 2011 cooling gas turbines jet engines thermodynamics The constant increase of the fuel price requires an optimization of the engine design tool in order to increase the efficiency and the power density of each component...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021009.
Published Online: June 23, 2011
... . 24 09 2010 29 10 2010 23 06 2011 23 06 2011 blades elasticity failure (mechanical) fans jet engines stators Advanced design composite fan stators at Honeywell have encountered high amplitude vibrations during development. Sanders ( 1 ) reported the destructive...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011023.
Published Online: June 1, 2011
... conditions of modern jet engines with a single stage HP-turbine. The mass-averaged inlet swirl angle is about −15 deg (counterswirl) measured from the engine axis. The Reynolds number level based on the chord length is here typically high and correlates with the HP-turbine inlet pressure level...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011002.
Published Online: May 24, 2011
... to their potential for reduced environmental impact and their inherent noise challenge. aerospace propulsion aircraft computational fluid dynamics fans flow instability flow simulation jet engines rotors wakes 3D unsteady RANS simulations were carried out using the commercially available...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031011.
Published Online: November 15, 2010
... layer turbulence computational fluid dynamics jet engines turbines The range and endurance of aircraft cruising at high altitude is limited by multiple factors, including the operational efficiency of the low pressure turbine. As aircraft elevation is increased, the operational Reynolds...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021016.
Published Online: October 22, 2010
... half than in the lower half of a stator wheel located upstream of a rotor wheel whose blades are vibrating. (This method has been used for some time now by certain gas turbine manufacturers and recently by the P&W Co. in response to low pressure turbine blade failures of their latest jet engine...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. October 2010, 132(4): 041003.
Published Online: April 26, 2010
... elasticity jet engines vehicle dynamics In many aeropropulsion applications, a relatively low fidelity engine model (i.e., without volume dynamics), which includes speed and temperature dynamics with the appropriate component performance characteristics, is adequate to design control laws...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2010, 132(3): 031017.
Published Online: April 5, 2010
...Marcus Hüning Gas turbines and jet engines consist of a network of connected cavities beside the main gas path called the secondary air system. These cavities, which are often surrounded by stationary and high angular speed rotating walls are exposed to varying pressure and temperature levels...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2010, 132(3): 031007.
Published Online: March 25, 2010
... , Compressor Aerodynamics , Longman , Harlow, UK . 26 08 2008 03 09 2008 25 03 2010 25 03 2010 drag fans flow simulation jet engines Mach number mass transfer nozzles numerical analysis rotors 1 An important consideration in the design of nacelles...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Technical Briefs
J. Turbomach. October 2009, 131(4): 044501.
Published Online: June 30, 2009
... negligible compared with the primary variables such as the suction ratio and extraction angle.o 07 12 2007 31 08 2008 30 06 2009 blades boundary layers channel flow combustion computational fluid dynamics cooling gas turbines heat conduction jet engines thin film devices...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Igti Scholar Lecture
J. Turbomach. July 2009, 131(3): 031101.
Published Online: April 20, 2009
... to in the research community. The case histories of two projects are given to illustrate the point: the development of the concept of “smart jet engines” and the Silent Aircraft Initiative. In addition to providing a capability to attack multidisciplinary problems, the way in which collaboration can enhance...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031011.
Published Online: April 9, 2009
... compressors jet engines rotors turbines 19 12 2007 04 02 2008 09 04 2009 The negative impact of recirculating bleed on engine performance and the higher surge margin potential at low power settings lead to the concept that the recirculation valves should be closed during steady...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031008.
Published Online: April 8, 2009
.... 11 08 2007 14 03 2008 08 04 2009 blades computational fluid dynamics flow simulation jet engines jets turbomachinery turbulence Due to the low air density at higher altitudes and to small dimensions of turbomachinery blades, jet engines operate at comparatively low...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2008, 130(3): 031005.
Published Online: May 2, 2008
.... The blowing ratio and density ratio are varied for a single compound angled geometry, and the complex three dimensional flow is investigated with special regard to vortical structure. 27 07 2006 03 04 2007 02 05 2008 blades computational fluid dynamics cooling geometry jet engines...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2008, 130(2): 021002.
Published Online: February 12, 2008
... in the squealer cavity. 13 08 2006 07 04 2007 12 02 2008 blades cooling gas turbines jet engines Mach number subsonic flow Some numerical investigations have also been carried out to study heat transfer and film-cooling effectiveness on blade tip. The effects of tip clearance...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. January 2008, 130(1): 011007.
Published Online: December 19, 2007
... 14, AGARD-AR-182. Walsh , P. P. , and Fletcher , P. , 1998 , Gas Turbine Performance , Blackwell , London. Habrard , A. G. , 1976 , “ Characterization of Components Performance and Optimization of Matching in Jet-Engine Development ,” AGARD-LS-83, pp. 7.1 – 7.19...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 119–126.
Published Online: January 1, 2007
... a series of accelerated deterioration tests on a General Electric J85-13 jet engine. The axial compressor was deteriorated by spraying atomized droplets of saltwater into the engine intake. The paper presents the overall engine performance deterioration as well as deteriorated stage characteristics...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 136–142.
Published Online: January 1, 2007
...Elisabet Syverud; Lars E. Bakken This paper reports the results of a series of online water wash tests of a GE J85-13 jet engine at the test facilities of the Royal Norwegian Air Force. The engine performance was deteriorated by injecting atomized saltwater at the engine inlet. The engine...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. October 2007, 129(4): 669–678.
Published Online: December 21, 2006
... and calculations to demonstrate the behavior and gives guidance for the design of bleed slots by stressing the fundamental features of the flow. 07 12 2006 21 12 2006 jet engines compressors stators blades aerodynamics Bleed off-takes on the hub and casing endwalls, part way through...
Journal Articles
Journal:
Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. October 2007, 129(4): 645–658.
Published Online: December 21, 2006
...B. A. Leishman; N. A. Cumpsty; J. D. Denton In a jet engine bleed off-takes on the hub and casing endwalls, part way through the compressor, supply high-pressure air for cooling, sealing, de-icing, and aircraft cabin air applications; bleed also assists compressor operation at part-speed conditions...
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