... September 17, 2018. Editor: Jerzy T. Sawicki. 25 06 2018 26 06 2018 Aeronautical propulsion Combustion Gas turbine technology Unsteady flows Aerospace Propulsion systems In Europe's H2020 program, the ULTIMATE project [ 1 ] is developing concepts for the next generation...

... similar propulsion systems with incrementally reduced input variables. In the following, a shortest path-based optimization is conducted over the locally minimum fuel consumption operating points, based on a set of gradient driven connectivity constraints for changes in gear ratio and bypass nozzle area...

... [4] Plas , A. P. , 2007 , “ Performance of a Boundary Layer Ingesting (BLI) Propulsion System ,” AIAA Paper No. 2007-450. 10.2514/6.2007-450 [5] Nickol , C. L. , 2008 , “ Silent Aircraft Initiative Concept Risk Assessment ,” NASA Langley Research Center, Hampton, VA, Report...

... Acoustic emission Aerospace Combustion Combustors Propulsion systems In the areas of modern aero-engines and industrial gas turbines, it is a necessity not only to maintain high performance but also to cut down fuel consumption and reduce pollutant emissions. One of the promising solutions...

... technology Propulsion systems The trend of higher bypass ratios (BPRs) on civil turbofan engines is likely to continue, and it seems plausible that the future turbofan engines will have BPR values as high as 15 [ 1 ]. This implies that the future high BPR engines will employ a larger fan, hence...

... Aerospace Experimental Flow induced vibration Gas turbine technology Measurement techniques Sensors Thermodynamics Propulsion systems Flow induced noise Nowadays, unstable compressor behavior is not yet fully understood and is still an attractive topic for many researchers since it strongly...

... Gas turbine technology Internal combustion engines Aerospace Propulsion systems In response to the strong emission targets imposed by the International Air Transport Association [ 1 ] and the Advisory Council of Aviation Research [ 2 ], significant improvements in aero engine propulsive...

... the full impact of the propulsion system, including the weight and drag, introducing an installed rational efficiency measure. Estimating the loss of work potential over a control volume provides a measure of the irreversibility. It shall be pointed out that this irreversibility is nothing else than...

... Propulsion systems Increasingly, a large demand in aero-transportation with less environmental impact and energy consumption has continuously drawn attention from academia, governments, and industries. Therefore, turboprop engines have been revisited again for their potential of high efficiency...

... AND P OWER . Manuscript received November 27, 2017; final manuscript received January 17, 2018; published online May 3, 2018. Editor: David Wisler. 27 11 2017 17 01 2018 Aerodynamics Aerospace Engines Experimental Measurement techniques Propulsion systems Commercial...

... protection in the United States. Approved for public release; distribution is unlimited. 27 09 2017 01 12 2017 Aeronautical propulsion Cooling Energy conversion Fuel combustion Internal combustion engines Measurement techniques Aerospace Propulsion systems Recent estimates...

...Chana Goldberg; Devaiah Nalianda; Panagiotis Laskaridis; Pericles Pilidis Conventional propulsion systems are typically represented as uninstalled systems to suit the simple separation between airframe and engine in a podded configuration. However, boundary layer ingesting systems are inherently...

... Aeronautical propulsion Gas turbine technology Heat exchangers Thermodynamics Aerospace Propulsion systems Nowadays, as the population increases, the demands for energy and fossil fuels are rising. However, this constantly growing consumption has a strong impact on the environmental pollution. Gas...

.... 11 03 2017 14 09 2017 Aeronautical propulsion Computational mechanics Fluid control systems Aerospace Propulsion systems As schematically represented in Fig. 1 , brush seals consist of an annular pack of fine bristles mounted between two plates. The bristles are usually...

... for Short Wavelength Stall Inception and Development in Multi-Stage Compressors,” ASME Paper No. 98-GT-476. 10.1115/98-GT-476 [13] Defoe , J. , Narkaj , A. , and Spakovszky , Z. S. , 2009 , “A Novel MPT Noise Methodology for Highly-Integrated Propulsion Systems With Inlet Flow Distortion...

... Unsteady flows Aerospace Propulsion systems Combustion For the fulfilment of pollutant emission limitations required for the next generation of civil aero-engines, lean burn combustion appears as one of the most promising technologies. Differently from current rich quench lean technology...

...-phase Unsteady Aerospace Propulsion systems A considerable research effort has concerned combustion dynamics issues with much of this work focused on problems raised by gas turbines. These machines operate in a lean premixed combustion mode to reduce NO x emissions, the flames are more...

..., 2017. Assoc. Editor: Klaus Brun. 30 05 2017 10 07 2017 Aeronautical propulsion Aerospace applications Design optimization Droplet Experimental Film Fluids Gas turbine technology Multiphase flows Separated Shear Flows Turbulent Two-phase Unsteady Aerospace Propulsion...

... is to understand the underpinning interface science of interspersed graded ceramic/metal and ceramic/ceramic composites at the grain structure level for robust coatings and bulk material components for vehicle propulsion systems. This research enhances our understanding of the fundamental relationship between...

... Aerodynamics Aerospace Aerothermodynamics Combustors Engines Gas turbine technology Thermodynamics Propulsion systems Rotorcrafts are able to undertake missions that are impossible for other aircraft. Thus, they have found a wide range of applications such as medical evacuation, search...