.... NASA’s subsonic fixed wing project Corner of the trade space N + 1 (2015) conventional tube and wing (relative to B737/CFM56) N + 2 (2020) unconventional hybrid wing/body (relative to B777/GE90) N + 3 (2030–2035) advanced aircraft concepts (relative to user-defined...

... and performance assessment methodology for advanced propfan powered aircraft configurations. The approach is based on first principles and combines a coupled aircraft and propulsion system mission and performance analysis tool with 3D unsteady, full-wheel CRP computational fluid dynamics computations...

...N. D. Cardwell; P. P. Vlachos; K. A. Thole Gas turbines for aircraft are designed for operation with a clean inlet air flow. This ideal operational condition is often violated during take-off and landing, where the probability of particle ingestion is high, with sand and dirt being the most...

...) and the limitation of perfection. Certain overlapping issues come up in each of the topic areas. 26 07 2009 27 07 2009 11 05 2010 11 05 2010 aerospace engines aircraft blades compressors turbomachinery This paper is based on an invited lecture for a session organized to honor...

... 2010 05 05 2010 aerodynamics aerospace components aerospace engines aircraft blades calibration compressors evaporation gas turbines mass transfer nozzles wet compression gas turbine compressor mean-line model nonequilibrium thermodynamics multiphase flow interphase...

...George Kopasakis; Joseph W. Connolly; Daniel E. Paxson; Peter Ma Under the NASA Fundamental Aeronautics Program, the Supersonics Project is working to overcome the obstacles to supersonic commercial flight. The proposed vehicles are long, slim body aircrafts with pronounced aeroservoelastic modes...

...P. N. Shah; D. D. Mobed; Z. S. Spakovszky A novel air-brake concept for next-generation, low-noise civil aircraft is introduced. Deployment of such devices in clean airframe configuration can potentially reduce aircraft source noise and noise propagation to the ground. The generation of swirling...

... loss, and to obtain data of Nusselt number and pressure loss coefficient for the design of turbine nozzles in the future by applying this new cooling structure to next-generation small-class aircraft engines. Additionally a preliminary analysis of airfoil cooling was performed to evaluate both cooling...

... aircraft design engineering durability gas turbines jet engines orifices (mechanical) In order to meet challenging efficiency targets, modern aircraft gas turbines are designed to operate with main gas path turbine temperatures exceeding the fatigue limit of some of the components. Therefore...

... Validation ,” ASME Paper No. GT2005-68893. Lukachko S. P. , and Waitz I. A. , 1997 , ” Effects of Engine Aging on Aircraft NOx Emissions ,” ASME Paper No. 97-GT-386. Roman , K. M. , and Howell , R. , 2007 , “ Development of Extended Ultra High Lift Low Pressure Turbine Blades...

... conditions, and particles present in clouds, during in-flight conditions, are the primary sources of particle ingestion for aircraft turbine engines. Blockages from these particles in these cooling passages reduce the effectiveness of cooling by decreasing the coolant flow rate, and subsequently part life...

...Michael Flouros Advanced aircraft engine development dictates high standards of reliability for the lubrication systems, not only in terms of the proper lubrication of the bearings and the gears, but also in terms of the removal of the large amounts of the generated heat. Heat is introduced both...

... 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...

... to be guaranteed for any aircraft engine throughout its service life. Typically this is achieved by designing the engine with high stability margins to cover any worst case scenario. This required margin limits the overall engine performance and the available component design space. aircraft blades...

...Cesare A. Hall; Daniel Crichton The Silent Aircraft Initiative is a research project funded by the Cambridge-MIT Institute aimed at reducing aircraft noise to the point where it is imperceptible in the urban environments around airports. The propulsion system being developed for this project has...

...Daniel Crichton; Liping Xu; Cesare A. Hall Preliminary fan design for a functionally silent aircraft has been performed with noise reduction as the primary goal. For such an aircraft the fan design must, in addition to delivering low cruise fuel burn, enable low jet and fan source noise during...

... people to learn that aircraft engines have been the recipients of the Collier Trophy. The compilation below, which contains the entire citation for the selected awards, clearly demonstrates the importance of jet propulsion to modern aviation.   Collier Award Citations1940: Dr. Sanford A. Moss...

... simulation pipe flow flow control jet engines jets microfluidics Mach number flow instability flow simulation pressure measurement design engineering aircraft The recent emphasis on unmanned aerial vehicles (UAVs) includes the ability to take new risks in enhancing aircraft abilities...

... aircraft boundary layer turbulence pressure control vortices rotors Few successful attempts have been made to reduce secondary loss through application of end-wall profiling to a blade row. One successful application of profiling has been demonstrated in the Linear Cascade at Durham University...

... 2001 23 01 2003 gas turbines aircraft heat transfer turbulence flow control pressure measurement temperature measurement Two competing desires for gas turbine engines are increased performance and reduced operating cost. The performance can typically be achieved through...