Results 191 to 200 of about 17,697 (215)
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Distributed Control of Turbofan Engines
45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009Abstract : The purpose of this paper is to develop control theoretic concepts for distributed control of gas turbine engines, and develop a dynamic engine model incorporating distributed components in compressor dynamics, engine cycles, and engine control.
Mehrdad Pakmehr +6 more
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Gross thrust coefficient - Turbofan engines
Journal of Aircraft, 1969QL = CS(h ± X6 (2) The plenum pneumatic capacitances are based on isentropic compressibility. The pressure rates associated with the inner circular skirt plenums and the inskirt plenum, which lies between the inner circular skirts and the outer peripheral skirt, vary with vehicle motion in pitch and heave where dP/dt = (kP/V)[2Q + A(dZ/dt ± xd8/dt)] (3)
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Modified Brayton Cycle for Turbofans
Volume 2: Combustion, Fuels, and Emissions; Renewable Energy: Solar and Wind; Inlets and Exhausts; Emerging Technologies: Hybrid Electric Propulsion and Alternate Power Generation; GT Operation and Maintenance; Materials and Manufacturing (Including Coatings, Composites, CMCs, Additive Manufacturing); Analytics and Digital Solutions for Gas Turbines/Rotating Machinery, 2019Abstract In the present study, a design point analysis of twin-spool turbofan engines is carried out, considering fuel injection of Aviation Turbine Fuel (ATF) in the initial stages of the compressor instead of combustor The two-phase compression brings about intercooling in the modified Brayton cycle, by injecting the atomized fuel ...
Chirag Singhal, Sameer Hasan, M. F. Baig
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Wear Prognostic on Turbofan Engines
Annual Conference of the PHM Society, 2013One of the most evident characteristic of wear for a turbofan engine is the exhaust gas temperature (EGT). It seems clear that this temperature increases when some carbon deposits on the turbine, when the compressor efficiency diminishes so the fuel flow should increase to produce the same amount of thrust, or even when some ...
Jérôme Lacaille +2 more
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Pratt & Whitney PW2037 Turbofan
Aircraft Engineering and Aerospace Technology, 1981“This engine will give Delta the most fuel‐efficient airplane in airline operations.”
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Bristol Siddeley BS 75 Turbofan
Aircraft Engineering and Aerospace Technology, 1962THE Bristol Siddeley 75 turbofan, which has been designed primarily for civil applications, has a maximum sea level thrust of 7,550 lb. and is suitable for twin‐engined short to medium range airliners of about 50,000 lb. all‐up‐weight, or four‐engined airliners of 70,000 to 90,000 lb. all‐up‐weight.
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Performance Enhancement of Subsonic Turbofans
SAE Technical Paper Series, 2016<div class="section abstract"><div class="htmlview paragraph">The key commercial aircraft propulsion requirements toward ensuring flight safety, operational efficiency, reduced CO<sub>2</sub> footprint, and community acceptability include high installed thrust, low specific fuel consumption, and reduced noise.
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Advanced Turbofan Blade Refurbishment Technique
Journal of Turbomachinery, 1995The purpose of the work reported here is to investigate whether the lessons learned from the work of Suder et al. can be used to reduce the in-service performance deterioration of a fan on a high bypass ratio turbofan engine. To this end, a back-to-back test was done on the fan of an RB211-22B engine with the cooperation of Delta Airlines.
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Robust monitoring of turbofan sensors
2014 IEEE Aerospace Conference, 2014Bench development tests of new turbofan engines make an important use of sensor measurements to help engineers understand the behavior of new components design. Such tests are expensive and may be completely compromised if any measurement is missing.
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