Results 41 to 50 of about 71,876 (215)
Frontiers in Mechanical EngineeringDuring service, civil turbofans experience environmentally induced deterioration. Predicting this in a digital service twin model is computationally challenging due to the need to model both deterioration mechanisms and environmental conditions.
Stefano Scarso +3 more
doaj +1 more source
Analysis of Interactions Among Loss-Generating Mechanisms in Axial Flow Turbines
International Journal of Turbomachinery, Propulsion and PowerAccurate loss prediction since the preliminary design steps is crucial to improve the development process and the aerodynamic performance of turbines.
Greta Raina +4 more
doaj +1 more source
Multi-Objective Optimization Control for the Aerospace Dual-Active Bridge Power Converter
Energies, 2018 With the development of More Electrical Aircraft (MEA), the electrification of secondary power systems in aircraft is becoming more and more common. As the key power conversion device, the dual active bridge (DAB) converter is the power interface for the
Tao Lei, Cenying Wu, Xiaofei Liu
doaj +1 more source
NASA Research in Aircraft Propulsion [PDF]
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries; Technology Resources; General, 1982 This report presents a broad overview of the scope of research presently being supported by NASA in aircraft propulsion. Aircraft systems work is performed to identify the requirements for the propulsion system that enhance the mission capabilities of the aircraft.
openaire +1 more source
System controls challenges of hypersonic combined-cycle engine powered vehicles [PDF]
Hypersonic aircraft with air-breathing engines have been described as the most complex and challenging air/space vehicle designs ever attempted. This is particularly true for aircraft designed to accelerate to orbital velocities.
Ianculescu, George D. +1 more
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Flow field and emission characterization of a novel enclosed jet-in-hot-coflow canonical burner
Applications in Energy and Combustion ScienceThe jet-in-hot-coflow is a canonical combustion setup, which has been used in several studies to study Flameless/MILD combustion and auto-ignition of fuels.
Thimo van den Berg +2 more
doaj +1 more source
STOVL aircraft simulation for integrated flight and propulsion control research [PDF]
The United States is in the initial stages of committing to a national program to develop a supersonic short takeoff and vertical landing (STOVL) aircraft.
Drummond, Colin K., Mihaloew, James R.
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A review of NASA's propulsion programs for aviation [PDF]
A review of five NASA engine-oriented propulsion programs of major importance to civil aviation are presented and discussed. Included are programs directed at exploring propulsion system concepts for (1) energy conservation subsonic aircraft (improved ...
Johnson, H. W. +2 more
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Preliminary study of VTO thrust requirements for a V/STOL aircraft with lift plus lift/cruise propulsion [PDF]
A preliminary assessment was made of the VTO thrust requirements for a supersonic (Type B) aircraft with a Lift plus Lift/Cruise propulsion system. A baseline aircraft with a takeoff gross weight (TOGW) of 13 608 kg (30,000 lb) was assumed.
Allen, J. L., Turney, G. E.
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A Piecewise Linear State Variable Technique for Real Time Propulsion System Simulation [PDF]
The emphasis on increased aircraft and propulsion control system integration and piloted simulation has created a need for higher fidelity real time dynamic propulsion models. A real time propulsion system modeling technique which satisfies this need and
Mihaloew, J. R., Roth, S. P.
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