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... says 'great debate' is approaching, Poor bloody corps?, Turbofan engines raise prospects of flights between city centres, ...
1971 - Gale Group | TDA
Sarath Sasi, Christos Mourouzidis, David John Rajendran, Ioannis Roumeliotis, Vassilios Pachidis, Justin Norman,
... A350-1000 equivalent aircraft. The impacts on both turbofan design and aircraft payload-range capability are presented. ... carrier for civil aviation is also presented. The turbofan design impacts, and payload range capability are assessed ... TURBOMATCH and NASA FLOPS respectively. A 3-point turbofan cycle design strategy is utilized for redesigning turbofan engine cycles using Ammonia as a fuel. Ammonia ... made using REFPROP to investigate its impact on turbofan design. Utilizing pure Ammonia as an aircraft fuel ...
Tópico(s): Advanced Combustion Engine Technologies
2024 - Elsevier BV | Energy Conversion and Management
IAN MCDONALD, By Our Diplomatic Correspondent, From FRED EMURY, BY OUR POLITICAL EDITOR, BY OUR LABOUR EDITOR, Our Political Staff, By GEORGE CLARK, From Our Correspondent, By PHILIP HOWARD, BY OUR POLITICAL STAFF, By Our Labour Staff, BY A STAFF REPORTER, Our Labour staff, By Our Education Correspondent, By a Staff Reporter, By Our Parliamentary Staff, By BRIAN CASHINELLA, Our Medical Correspondent, Our Race Relations Correspondent, By Our Political Editor, FROM CHARLES HARGROVE, From Edward Mortimer, From ROGER BERTHOUD, From Our Own Correspondent, From CHRIS DUNKLEY, From PETER NICHOLS, From HILARY BRIGSTOCKE, From PETER HAZELHURST, Moshe Brilliant, Ian McDonald, From STEWART HARRIS, From DESSA TREVISAN, From MICHAEL LEAPMAN, By Irving Wardle, by John Russell Taylor, by Stanley Sadie, by Joan Chissell, Michael Billington, by Antony King-Deacon, Peter Jay Economics Editor, PHS, From IAN McDONALD, PHILIP NOEL-BAKER, CYRIL PETRIBURG, C. G. LANCASTER, ANTHONY ROYLE, W. W. KAY, RAMAN SUBBA ROW, GRIDLEY, B. S. MARSTON, DOROTHY CARR, By John Grigg, SIDNEY SABIN, L. C. McCLEAN, PAUL N. MARKS, CECILY PHELPS, BARBARA M. WEBB, KAREN P. BURLEY., BY OUR ASTRONOMICAL CORRESPONDENT, By MICHAEL PHILLIPS, Racing Correspondent, By our Racing Correspondent, By our Newmarket Correspondent, By Our Northern Racing Correspondent, By Our Newmarket Correspondent, By JIM SNOW, By JOHN WOODCOCK, Cricket Correspondent, By REX BELLAMY, TENNIS CORRESPONDENT, By GEOFFREY GREEN, Football Correspondent, By PETER RYDE, Golf Correspondent, By NEIL ALLEN, Athletics Correspondent, By ROY McKELVIE, By Our Rifle Shooting Correspondent, by Michael Baily, Transport Correspondent, by Kathleen Evans, by John Northcott, by Michael Baily, by William Ongar, by GERALD ELY, By JOHN WHITMORE, From PHILIP JACOBSON, US Financial Correspondent, From FRANK VOGL, By JOHN ARMYTAGE, By GILES SMITH, By INNIS MACBEATH, By R. W. SHAKESPEARE, By DENNIS DWYER, BY OUR MIDLAND INDUSTRIAL CORRESPONDENT, M. WILOCK HOLGATE, By CLIFFORD WEBB, Midland Industrial Correspondent, From JOHN EARLE, By ANTHONY ROWLEY, European Industrial Correspondent, From ANTHONY THOMAS, US Economics Correspondent, BY THE FINANCIAL EDITOR, FROM OUR US ECONOMICS CORRESPONDENT, By IAN MORISON, By DAVID JONES, Political Staff, By PETER HILL, ANTHONY WOOLF., F. S. GRINDROD., OLIVER ELPHICK., R. C. SIMPKIN., By GEOFFREY BELL, by Eric Wigham, by Our Special Correspondent, EDITED BY KENNETH OWEN,
... Tri-jet' tests soon for the Rolls-Royce turbofan engine, Lifeline For Freight. Picture Gallery. Politics and ...
1970 - Gale Group | TDA
Shaimaa Seyam, İbrahim Dinçer, Martin Agelin‐Chaab,
... paper presents two proposed high bypass three-shaft turbofan engines combined a molten carbonate fuel cell (MCFC-turbofan) and a solid oxide fuel cell (SOFC-Turbofan). Energy and exergy analyses are conducted to investigate ... 25% hydrogen. The results show that the base turbofan has a maximum thrust force of 153 kN, while the SOFC- and MCFC-turbofans have 116 kN and 107 kN, respectively. The ... are 43.4% and 52% for the base-turbofan, 52.8% and 66.2% for the SOFC-turbofan, and 71% and 87.6% for the MCFC- ...
Tópico(s): Advanced Combustion Engine Technologies
2021 - Elsevier BV | Energy
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... trade Word-Watching Engine makers link up for turbofan venture Business Roundup Clayform stake bought Amber rethink ...
1993 - Gale Group | TDA
M. Mawid, T. W. Park, Balu Sekar, C. Arana,
... detonation combustion in the bypass duct of a turbofan engine for possible elimination of the traditional afterburner was investigated in this study. A pulse detonation turbofan engine concept without an afterburner was studied and ... consumption (SFC), and specific thrust of a conventional turbofan with an afterburner and the new pulse detonation turbofan engine concept were calculated and compared. The pulse ... can be obtained by using the pulse detonation turbofan engine concept as compared to the conventional afterburning ...
Tópico(s): Advanced Combustion Engine Technologies
2002 - ASM International | Journal of Engineering for Gas Turbines and Power
S. J. Horowitz, R. K. Sigman, Ben T. Zinn,
... for predicting the sound field radiated from a turbofan inlet is presented. The sound field is divided ... rise in noise pollution, especially that caused by turbofan engines, has created considerable interest in developing methods ... for these engines. The two major sources of turbofan engine noise are the externally generated noise produced ... internally generated noise due to the rotating turbomachinery, turbofan blades, and combustion processes. The noise due to ... due to the use of high bypass ratio turbofan engines which have a reduced jet velocity over ...
Tópico(s): Vehicle Noise and Vibration Control
1982 - American Institute of Aeronautics and Astronautics | AIAA Journal
Parisa Derakhshandeh, Abolfazl Ahmadi, Reza Dashti,
In this study, The General Electric GE90 turbofan engine is thermodynamically simulated MATLAB in both states of using hydrocarbon fuel and hydrogen fuel at the design point conditions. Subsequently, the genetic ... optimal performance, environmental, and economic conditions for hydrogen Turbofan, that have been obtained to be 10.2965 ... result of a change from the hydrocarbon GE90 turbofan to the optimized hydrogen GE90 turbofan: (i). The net thrust force increases by 16. ... result of a change from the hydrogen GE90 turbofan to the optimized hydrogen GE90 turbofan: (i). The ...
Tópico(s): Rocket and propulsion systems research
2020 - Elsevier BV | International Journal of Hydrogen Energy
Bei Yang, Xi Wang, Penghui Sun,
The precise control of turbofan engines thrust is an important guarantee for an aircraft to obtain good flight performance and a challenge due to complex ... to obtain an accurate kinetic model for the turbofan engine. Secondly, some model parameters often change in ... These variable parameters bring huge challenge for the turbofan engine control. To solve the turbofan engine control problem, this paper presents a non- ... methods to design an effective controller for the turbofan engine and to provide a new way for ...
Tópico(s): Control Systems and Identification
2019 - Elsevier BV | Chinese Journal of Aeronautics
... viability, performance, and characteristics of a turbojet-to-turbofan conversion through the use of a continuously variable ... the simple cycle turbojet, a direct shaft joined turbofan, and a CVT coupled turbofan with variable bypass is contrasted. The baseline turbojet and turbofan findings are validated against a commercial software. The ... high quantitative agreement. Analyzing the results of the turbofan engine equipped with a variable bypass and CVT, ... a micro-turbojet into a variable cycle micro-turbofan will greatly improve the performance and efficiency of ...
Tópico(s): Air Traffic Management and Optimization
2016 - ASM International | Journal of Engineering for Gas Turbines and Power
Dingding Cheng, Lijun Liu, Zhen Yu,
... problem of fault-tolerant control is investigated for turbofan engines with actuator faults. The controller involvement has ... of actuator faults on the controlled outputs of turbofan engines, making fault-tolerant control difficult. To solve this problem, the internal gas-path data of turbofan engines is introduced to provide conducive fault information. ... CNN-based intelligent fault-tolerant control system for turbofan engines is proposed, including a CNN-based fault ... the accuracy requirements of the mathematical description of turbofan engines. Furthermore, the proposed system can diagnose actuator ...
Tópico(s): Fault Detection and Control Systems
2021 - Institute of Electrical and Electronics Engineers | IEEE Access
Zhitao Wang, Jingkai Zhang, Chuming Gao, Ming Liang,
... in coastal areas in summer, the performance of turbofan engine and starter will be inevitably affected by ... humidity and temperature on the matching process between turbofan engine and starter. However, in the start-up ... to simulate the variation of transient performance of turbofan engine caused by the power change of the ... process is presented. The nonlinear transient model including turbofan engine and starter is developed based on real ... power compatibility equation is established to correlate the turbofan engine and starter to predict the matching performance ...
Tópico(s): Rocket and propulsion systems research
2022 - Elsevier BV | Applied Thermal Engineering
... energetic and exergetic behaviour of high by-pass turbofan are parametrically examined. Besides, cruise NOx emission is ... Specific NOx Production (SNP) is quantified for the turbofan engine. Thanks to this parameter, NOx effect of ... parametric cycle equations and emission calculation methods regarding turbofan engine are encoded so as to determine performance ... results, the average specific fuel consumption (SFC) regarding turbofan engine is predicted as 19.65 g/kN. ... 11 km. Finally, the mean SNP regarding the turbofan is measured as 0.5071 g/kN.s ...
Tópico(s): Advanced Combustion Engine Technologies
2022 - Elsevier BV | Energy
Halil Tuzcu, Yasin Şöhret, Hakan Çalişkan,
... environment and enviroeconomic analyses are applied to the turbofan engine used in aviation industry. The CO 2 emissions of the turbofan engine are calculated and cost of the CO ... are evaluated. The energy efficiencies of the overall turbofan engine system, high pressure turbine, low pressure turbine ... calculated as 5742.52 US$/day for the turbofan engine. Also, 3.35 kg carbon dioxide is ... study can be useful for developing environmentally sustainable turbofan engines as well as for researches and designers ...
Tópico(s): Energy, Environment, and Transportation Policies
2020 - Wiley | Environmental Progress & Sustainable Energy
Linfeng Gou, Xianyi Zeng, Zhaohui Wang, Guangjie Han, Chuan Lin, Xu Cheng,
... this paper, we propose a linear model of turbofan engine for intelligent analysis in IIoT, with the ... steps: First, a nonlinear mathematical model of a turbofan engine is established by adopting the component modeling approach. Then, numerous parameters of the turbofan engine components and their operating data are obtained ... that a dynamic real-time linearized model of turbofan engine is obtained. Simulation results show that the ... can accurately depict the dynamic process of the turbofan engine and provide a valuable reference for designing ...
Tópico(s): Aerospace Engineering and Applications
2019 - Institute of Electrical and Electronics Engineers | IEEE Access
Lothar Bertsch, Florian Wolters, Wolfgang Heinze, Michael Pott-Pollenske, Jason Blinstrub,
A geared turbofan with an increased bypass ratio promises reduced engine noise generation if compared to conventional turbofan engines with lower bypass ratios. As a result, ... other noise sources on an aircraft with geared turbofan engines is emphasized and will become more relevant. ... variants under consideration are presented. Finally, the geared turbofan engine is also installed on an earlier low- ... noise airframe measures in combination with a geared turbofan concept are promising, especially on an airframe architecture ...
Tópico(s): Acoustic Wave Phenomena Research
2019 - American Institute of Aeronautics and Astronautics | Journal of Aircraft
Martin A. York, Warren Hoburg, Mark Drela,
... a full one-dimensional core and fan flowpath turbofan optimization model, based on first principles, and meant ... all-at-once manner. To demonstrate this, the turbofan model is integrated with a simple commercial aircraft sizing model. The turbofan model is validated against the Transport Aircraft System Optimization turbofan model as well as two Georgia Institute of Technology Numerical Propulsion System Simulation turbofan models. Four integrated engine/aircraft parametric studies are ...
Tópico(s): Probabilistic and Robust Engineering Design
2017 - American Institute of Aeronautics and Astronautics | Journal of Aircraft
Michael Frye, Stephen M. Gammon, Chunjiang Qian,
... a modeling and research program for the tri-turbofan remote-controlled airship. The purpose of this research ... and control techniques of autonomous airships. The tri-turbofan simulation environment is a first principle force-based ... of motion of an airship. Also, the tri-turbofan simulation environment calculates the linear longitudinal and lateral- ... integrated into the graphical interface. Finally, the Tri-Turbofan simulation was verified against flight test data acquired ... This paper illustrates the use of the Tri-Turbofan simulation environment by integrating a simple velocity hold ...
Tópico(s): Underwater Vehicles and Communication Systems
2007 - Institute of Electrical and Electronics Engineers | Proceedings of the ... American Control Conference/Proceedings of the American Control Conference
Junjie Lu, Feng Lü, Jinquan Huang,
... computationally efficient performance estimation and fault diagnosis for turbofan engines has become a new research focus and ... is able to increase reliability and stability of turbofan engine and reduce the life cycle costs. Accurate estimation of turbofan engine performance counts on thoroughly understanding the components’ ... the credibility of the fault diagnosis for the turbofan engine. The presented method utilizes the LM algorithm ... result for performance estimation and fault diagnosis of turbofan engine than current popular EKF and PF diagnosis ...
Tópico(s): Advanced Sensor Technologies Research
2018 - Multidisciplinary Digital Publishing Institute | Energies
Trevor H. Speak, Robert J. Sellick, Vadim Kloos, Peter Jeschke,
A novel two-spool turbofan engine configuration is described which uses a booster powered by both the low an high pressure spools. Design and off- ... in the booster compressor of conventional two-spool turbofans. This combination gives rise to many stages in ... conducted and comparison is made between a conventional turbofan and a turbofan fitted with the dual drive booster. The results ... presented concept is an alternative to the conventional turbofan and should be considered during the conceptual design ...
Tópico(s): Advanced Combustion Engine Technologies
2015 - ASM International | Journal of Engineering for Gas Turbines and Power
Xiran Liu, Dan Zhao, Di Guan, Sid Becker, Dakun Sun, Xiaofeng Sun,
Turbofan engines are one of the most popular propulsion systems used in commercial aircraft due to their ... good fuel efficiency. To reduce noise generated from turbofan engines-powered aircraft, a number of control approaches ... great potential to be applied or implemented on turbofan engines. The research and development progress made on ... an useful guidance on next-generation low-noise turbofan engines. The fundamental noise damping mechanisms of thermos- ...
Tópico(s): Aerodynamics and Fluid Dynamics Research
2022 - Elsevier BV | Progress in Aerospace Sciences
Yanhua Ma, Xian Du, Xi‐Ming Sun, Fang-Jiao Zhao,
... active fault-tolerant tracking control scheme for the turbofan engine under dynamic and simultaneous actuator faults and ... on the linear parameter-varying model of the turbofan engine, an H∞ state feedback nominal controller is ... scheduling characteristics at different working conditions for the turbofan engine. Next, for the control system with simultaneous ... simulations have been conducted on a twin-spool turbofan engine to verify the effectiveness of the strategy.
Tópico(s): Fault Detection and Control Systems
2021 - Elsevier BV | ISA Transactions
Haoying Chen, Changpeng Cai, Shangbin Jiang, Haibo Zhang,
... consider the capacity of aircraft infrared stealth, a turbofan engine with inlet ejector nozzle is derived for flight mission analysis. The turbofan engine is equipped with an auxiliary inlet door ... simulations results indicated that, compared with the conventional turbofan engine, the turbofan engine with inlet ejector not only reduces the ...
Tópico(s): Advanced Aircraft Design and Technologies
2021 - Elsevier BV | Aerospace Science and Technology
Yanhua Ma, Xian Du, Xi‐Ming Sun,
An accurate and reliable turbofan engine model which can describe its dynamic behavior within the full flight envelop and lifecycle plays a critical role in ... In this paper, an adaptive modification method of turbofan engine nonlinear Component-Llevel Model (CLM) based on ... between the experimental data and CLM of a turbofan engine under health condition. Then, a sensitivity analysis ... verified on a military low-bypass twin-spool turbofan engine, and the experimental results show the effectiveness ...
Tópico(s): Technical Engine Diagnostics and Monitoring
2021 - Elsevier BV | Chinese Journal of Aeronautics
Fafu Guo, Jiang Qin, Zhixing Ji, He Liu, Kunlin Cheng, Silong Zhang,
This work investigates a turbofan engine (a type of gas turbine, GT) integrated solid oxide fuel cells (SOFCs) based on Al-H2O hydrogen production to ... of the engine, the thermodynamic models of the turbofan engine, the Al-H2O reactor, and the SOFC ... comparisons between the SOFC-GT engine and the turbofan engine under different electric power fractions are carried ... 18.98%, and 24.08% compared with the turbofan engine when the electric power fractions are 15%, ...
Tópico(s): Catalysis and Oxidation Reactions
2021 - Elsevier BV | Energy Conversion and Management
Haoying Chen, Haibo Zhang, Zhihua Xi, Qiangang Zheng,
... of ejector nozzle on the overall performance of turbofan engine, a turbofan engine model with ejector nozzle is established in ... The infrared characteristics and overall performance of the turbofan engine with ejector nozzle are analyzed and calculated ... the flight missions. Firstly, the simulation model of turbofan engine with ejector nozzle is established and the ...
Tópico(s): Radiative Heat Transfer Studies
2019 - Elsevier BV | Applied Thermal Engineering
Mehmet Emin Cilgin, Önder Turan,
Abstract Entropy generation and energy efficiency of turbofan engines become greater concern in recent years caused by rises fuel costs and as well as environmental impact of aviation emissions. This study ... for a two-spool CFM56-7B high-bypass turbofan widely used on short to medium range, narrow ... kJ/kg K. Besides, overall efficiency of the turbofan is determined to be 14 %, while propulsive and ... produced power dimension in engine components for commercial turbofans and aero-derivative cogeneration power plants.
Tópico(s): Thermodynamic and Exergetic Analyses of Power and Cooling Systems
2017 - De Gruyter | International Journal of Turbo and Jet Engines
Sangjo Kim, Dong‐Hyun Kim, Changmin Son, Kuisoon Kim, Myung-Ho Kim, Seongki Min,
... axial compressor for improving the performance of a turbofan engine with required surge margin. Most researchers assumed ... to consider the effect of VGVs on a turbofan engine. The VGVs are applied to the front ... high pressure compressor in the low-bypass ratio turbofan engine. The compressor of the front stages is ... the on- and off-design performance of the turbofan engine. 1D meanline analysis is used for performance ...
Tópico(s): Refrigeration and Air Conditioning Technologies
2015 - Elsevier BV | Aerospace Science and Technology
Cengiz Hakan Aydın, Önder Turan, T. Hikmet Karakoç, Adnan Mi̇di̇lli̇,
... running conditions. First, a detailed exergy analysis of turbofan engine have been performed based on engine test ... exergy-based sustainability indicators. The indicators of the turbofan engine developed here in conjunction with exergetic analysis ... effect factor, and exergetic sustainability index of investigated turbofan engine are found to be 0.315, 0. ... These parameters are expected to quantify how the turbofan engine and aircraft become more environmentally benign and ...
Tópico(s): Advanced Thermodynamic Systems and Engines
2014 - Taylor & Francis | International Journal of Green Energy
Mofid Gorji-Bandpy, Mohammadreza Azimi,
Turbofan engines are commonly used for commercial transport due to their advantages of higher performance and lower ... is one of the principal noise sources of turbofan aeroplane engines and remains an acute environmental problem ... continues to be made with noise reduction for turbofan engines. Analytical and semiempirical models have been developed ... discusses the major components of jet noise in turbofan engines and presents a review of jet noise ...
Tópico(s): Acoustic Wave Phenomena Research
2012 - Vilnius Gediminas Technical University | Aviation