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... Claim For New British Aero Engine Turboprop And Turbojet Advantages Combined, Parisians Watch In Mist Fall In ...
1961 - Gale Group | TDA
Irina-Carmen ANDREI, Adrian Toader, Gabriela STROE, Florin Frunzulică,
The purposes of modeling and simulation of a turbojet engine are the steady state analysis and transient ... on appropriate modeling describing the operation of a turbojet engine at design and off-design regimes, results ... design performances, in case of a single spool turbojet is detailed. An in house code was developed, its calibration was done for the J85 turbojet engine as the test case. The dynamic modeling of the turbojet engine is obtained from the energy balance equations ... main parts, expresses the dynamic behavior of the turbojet engine, and further, provides details regarding the engine' ...
Tópico(s): Computational Fluid Dynamics and Aerodynamics
2017 - American Institute of Physics | AIP conference proceedings
Cyrus B. Meher-Homji, Erik Prisell,
... Joachim Pabst von Ohain, co-inventor of the turbojet, passed away at the age of 86. As ... von Ohain conceived of and built a demonstrator turbojet engine. He was hired by the Heinkel Aircraft ... Ernst Heinkel, designed the world’s first flight turbojet engine. This paper traces the technical antecedents leading ... aircraft powered by von Ohain’s HeS 3B turbojet. During his tenure at Heinkel and thereafter at ... Company, he was responsible for a series of turbojet engines culminating in the advanced second generation HeS ...
Tópico(s): Guidance and Control Systems
2000 - ASM International | Journal of Engineering for Gas Turbines and Power
Hui Li, Zhengping Zou, Yiming Chen, Pengcheng Du, Chao Fu, Yifan Wang,
In theory, the operating Mach number of a turbojet engine could be broadened by using supercritical coolant ... precoolers, and to clarify the precooling impacts on turbojet engine thrust performance, an annular precooler with a ... Besides, a comprehensive test platform for the precooler-turbojet engine coupling experiments was also built. On this ... high effectiveness. The operating Mach number of the turbojet engine was extended to Ma = 3.35 and ... was confirmed to cause no damage to the turbojet engine operation during the experiments. Finally, a new ...
Tópico(s): Advanced Combustion Engine Technologies
2023 - Elsevier BV | Energy
Benshan Liu, Yongsheng Gao, Liang Gao, Junming Zhang, Yanhe Zhu, Xizhe Zang, Jie Zhao,
Turbojet engines have a slow response and require mechanical assistance to perform vertical take-offs and landings. ... problem of dependence on the response of the turbojet. The turbojet engine is placed horizontally in the module, the ... speeds are fixed, and the force along the turbojet axis remains constant as the nozzle rotates from ... longer rely on the response speed of the turbojet engine, and controlling the angles of four nozzles ... operate the aircraft. The horizontal placement of the turbojet can reduce the thickness of the aircraft fuselage ...
Tópico(s): Aerospace Engineering and Control Systems
2022 - Multidisciplinary Digital Publishing Institute | Aerospace
Jialin Zheng, Juntao Chang, Jicheng Ma, Daren Yu,
... when the fuel mass flow rate of the turbojet engine is decreasing to zero gradually. Existed research ... status coupled with the operating point of the turbojet engine is also considered. Results show that this ... torque instead of a negative one when the turbojet engine operates at some sub-idle states. Moreover, ... unstart would happen at some point when the turbojet engine is shutting down to the free windmilling state, under which the turbojet engine would bring in the flight drag instead ... thrust. In the descent mode transition when the turbojet engine is accelerating to be restarted, an inappropriate ...
Tópico(s): Gas Dynamics and Kinetic Theory
2020 - Elsevier BV | Aerospace Science and Technology
Rudolf Andoga, Ladislav Főző, Radovan Kovács, Károly Beneda, Tomáš Moravec, Michal Schreiner,
Modern turbojet engines mainly use computerized digital engine control systems. This opens the way for application of advanced algorithms ... them ideal candidates for application in the current turbojet engine control units. Different methodologies in the design of robust controllers, utilizing a small turbojet engine with variable exhaust nozzle designated as iSTC- ... account the limitations and specifics of a real turbojet engine and its hardware, contrary to most studies ... resulting speed controllers for a class of small turbojet engines, which can be applied in a discrete ...
Tópico(s): Industrial and Mining Safety
2019 - Multidisciplinary Digital Publishing Institute | Machines
L. Fomekong Tsague, Thomas Tamo Tatiétsé, J.M. Ngundam, Joseph Tsogo,
The prediction of nitrogen oxides emissions in turbojet engines exhausts remains a field of immense importance given the increasing coercive environmental requirements in relation to the emissions from turbojet engines. Emissions of nitrogen oxides (NOx) are subjected ... phenomena governing the formation of the NOx in turbojet engines. It is a combination of chemical, thermal, ... prediction of nitrogen oxides emission index (EINOx) in turbojet engines exhausts using the main combustion operational parameters. ...
Tópico(s): Air Traffic Management and Optimization
2007 - Elsevier BV | Aerospace Science and Technology
... As potential solutions for the airbreathing propulsion, some turbojet-type engines are presented: •—the twin spool turbojet or turbofan with reheat•—the turbojet with reheat•—the twin-duct turbojet ramjet•—the precooled turbojet with reheat.All these engines have been sized ... variable geometry and heat exchangers. The twin-duct turbojet ramjet, for example, is probably one of the ...
Tópico(s): Spacecraft and Cryogenic Technologies
1966 - Elsevier BV | International Journal of Mechanical Sciences
... irreversibility assessment of energy conversion systems is significant. Turbojets, a type of energy conversion system, are widely ... a comprehensive irreversibility assessment methodology exemplification for a turbojet. First of all, a basic irreversibility assessment methodology ... for the decomposition of the irreversibility in a turbojet and its components. At the end of the ... to be in the turbine component of the turbojet engine whereas the highest avoidable irreversibility is found to be in the compressor component of the turbojet engine. The current paper is considered to be ...
Tópico(s): Advanced Thermodynamics and Statistical Mechanics
2018 - Elsevier BV | Propulsion and Power Research
... paper, an exergy based sustainability assessment of a turbojet engine under design point conditions is presented while ... ecological coefficient of performance, are introduced for the turbojet engine. These ecological performance indicators can be considered useful for improving the efficiency of any turbojet engine. As a result of an exemplifying analysis, ... concludes that the exergy destruction rate of the turbojet engine should be minimized to improve the sustainability ... or maintaining a constant thrust of the examined turbojet engine.
Tópico(s): Thermodynamic and Exergetic Analyses of Power and Cooling Systems
2018 - Vilnius Gediminas Technical University | Aviation
... jet and hydrogen (H2) fueled J79-GE-17 turbojet engine are done. The results are compared for ... decreases 63.987% the energy efficiency of the turbojet engine reduces from 30.293% to 29.979%, ... combustion chamber component increases 10.581%, and the turbojet engine exergy efficiency rises from 28.54% to ... hydrogen fuel utilization for the J79-GE-17 turbojet engine is higher than JP-8 fuel utilization ...
Tópico(s): Rocket and propulsion systems research
2022 - Elsevier BV | International Journal of Hydrogen Energy
Selçuk Ekici, İlkay Orhan, Yasin Şöhret, Önder Altuntaş, T. Hikmet Karakoç,
... exogenous parts of exergy destruction of an experimental turbojet engine (Unmanned Aerial Vehicle Turbojet – UAVT). Test data used for exergy analysis were evaluated at the maximum load of the experimental turbojet engine which consisted of a compressor, a combustion ... 5943 kW in the compressor component of the turbojet engine. In this study, the endogenous and exogenous ...
Tópico(s): Advanced Thermodynamic Systems and Engines
2019 - De Gruyter | International Journal of Turbo and Jet Engines
Rudolf Andoga, Ladislav Főző, Martin Schrötter, Marek Češkovič, Stanislav Szabó, Róbert Bréda, Michal Schreiner,
... thermal imaging in aviation. In the area of turbojet engines, infrared imaging has been used to detect ... which evaluates the technical state and diagnoses a turbojet engine during its operation based on infrared thermal ( ... successfully applied to segment IRT images of a turbojet engine with high precision, and the expert system ... system using data from a small iSTC-21v turbojet engine operating in laboratory conditions.
Tópico(s): Advanced Measurement and Detection Methods
2019 - Multidisciplinary Digital Publishing Institute | Applied Sciences
Zhixing Ji, Jiang Qin, Kunlin Cheng, He Liu, Silong Zhang, Peng Dong,
... aero-engine performance and electric power fraction, the turbojet engine integrated with an interstage turbine burner (ITB) ... ITB-SOFC engine) is proposed in this paper. Turbojet engine provides thrust for propulsion and SOFC provides ... in thermal efficiency and specific thrust over the turbojet engine, the increments of these two parameters can ... wide range. The specific thrust increment over a turbojet engine is high up to 24.07% if ...
Tópico(s): Catalysis and Oxidation Reactions
2018 - Elsevier BV | Energy
Bartosz Gawron, Tomasz Białecki,
... experimental performance and the emission characteristics of a turbojet engine were investigated in this paper. The studies were conducted with the use of a miniature turbojet engine, which is the main component of a ... the subject contains many papers using small-scale turbojet engines for testing alternative fuels. However, most of ... engine test, which models different modes of a turbojet engine's operation. The obtained results are compared ...
Tópico(s): Advanced Combustion Engine Technologies
2017 - Springer Science+Business Media | International Journal of Environmental Science and Technology
... study, the viability, performance, and characteristics of a turbojet-to-turbofan conversion through the use of a ... simulation code, the performance of the simple cycle turbojet, a direct shaft joined turbofan, and a CVT ... turbofan with variable bypass is contrasted. The baseline turbojet and turbofan findings are validated against a commercial ... current research suggests that adaptation of a micro-turbojet into a variable cycle micro-turbofan will greatly ...
Tópico(s): Air Traffic Management and Optimization
2016 - ASM International | Journal of Engineering for Gas Turbines and Power
Advanced control in the area of turbojet engines defines many different applied complex control strategies.Highly theoretical approaches and designs are often presented in this area.The article is ... adaptive controller design for a class of small turbojet engines in triple loop control architecture.The article ... a non-linear dynamic model of a small turbojet engine taking in account the environmental conditions, which ... can also be used for other classes of turbojet engines as well other similar technical systems.
Tópico(s): Advanced Control and Stabilization in Aerospace Systems
2019 - Óbuda University | Acta Polytechnica Hungarica
Özgür Ballı, Nesrin ÇALIŞKAN, Hakan Çalişkan,
In this study, J69 military turbojet aero engine of Cessna T-37B/C pilot trainer aircraft fueled by jet fuel and %100-biofuel is assessed with aviation, ... H:O ratio of the commercial biodiesel. J69 turbojet engine's exergy efficiency increases from 17.058% ... as a sustainable aviation fuel for J69 military turbojet engine used on the Cessna T-37B/C ...
Tópico(s): Biodiesel Production and Applications
2022 - Elsevier BV | Energy
Rudolf Andoga, Ladislav Főző, Martin Schrötter, Stanislav Szabó,
... of alternative fuels in the area of small turbojet engines with thrust ratings up to 2 kilo- ... its effects on the operation of a small turbojet engine under laboratory conditions. Several concentrations of ethanol ... fuel on the basic parameters of a small turbojet engine. The influence of the different concentrations of ...
Tópico(s): Aerospace Engineering and Control Systems
2021 - Multidisciplinary Digital Publishing Institute | Sustainability
Alejandro M. Briones, Andrew W. Caswell, Brent A. Rankin,
... and thermodynamic cycle analyses of a small-scale turbojet engine at several conditions along the equilibrium running ... cycle analyses are compared with measurements of the turbojet engine. The CFD simulations, thermodynamic cycle analyses, and ... from the intake to the exhaust of the turbojet engine are expected to be useful for guiding ...
Tópico(s): Advanced Combustion Engine Technologies
2020 - ASM International | Journal of Engineering for Gas Turbines and Power
Marek Waligórski, Karolina Batura, Karolina Kucal, Jerzy Merkisz,
... for the assessment of thermodynamic processes in the turbojet engine of the F-16 airplane given in ... and combustion processes taking place at the aircraft turbojet engine to maintain the high overall efficiency and ... functional relations for building a diagnostic system for turbojet F-16 airplane engines for real operating conditions. ...
Tópico(s): Advanced Measurement and Detection Methods
2020 - Elsevier BV | Measurement
Zhixing Ji, Jiang Qin, Kunlin Cheng, Fafu Guo, Silong Zhang, Peng Dong,
... achieved by high-performance aero-engines. A traditional turbojet engine with steam injection is hardly operated at ... and 51% respectively compared with the pre-cooling turbojet engine at the water-air ratio of 0. ... 1.15 times that of the pre-cooling turbojet engine at Mach 4. Meanwhile, the specific thrust ...
Tópico(s): Advancements in Solid Oxide Fuel Cells
2019 - Elsevier BV | Energy
P. Gunasekar, S. Manigandan, S. Venkatesh, R. Gokulnath, Rakesh Vimal, P. Booma Devi,
... present an effective use of hydrogen fuel for turbojet engines based on its exergetic performance. Design/methodology/ ... to measure the assessment of exergetic data of turbojet engines. Initially, the test was carried out on ... series of similar tests were carried out on turbojet engines with hydrogen fuel to measure their performance ... characteristics. Originality/value The use of hydrogen in turbojet engines showed an adverse effect on exergetic performance. ...
Tópico(s): Combustion and flame dynamics
2019 - Emerald Publishing Limited | Aircraft Engineering and Aerospace Technology
Işıl Yazar, Emre Kıyak, Fikret Çalışkan, T. Hikmet Karakoç,
... a nonlinear mathematical model of a small-scale turbojet aeroengine and also a speed controller design that ... approach In the nonlinear mathematical model of the turbojet engine, temperature, rotational speed, mass flow, pressure and ... then compared with the cycle data of the turbojet engine. Because of the single variable control need ...
Tópico(s): Aerospace and Aviation Technology
2018 - Emerald Publishing Limited | Aircraft Engineering and Aerospace Technology
Vivek Patel, Vimal Savsani, Anurag Mudgal,
... and fuel consumption optimization of a subsonic/sonic turbojet engine. A thermal model of the turbojet engine is developed for optimization investigation. A many- ... and minimization of thrust-specific fuel consumption of turbojet engine and solved using multi-objective heat transfer ...
Tópico(s): Thermodynamic and Exergetic Analyses of Power and Cooling Systems
2017 - Elsevier BV | Energy
Selçuk Ekici, Yasin Şöhret, Kahraman Coban, Önder Altuntaş, T. Hikmet Karakoç,
... is to determine the performance of a small turbojet engine with an exergetic analysis based on test ... testing was collected at full-load of small turbojet engine. The turbojet engine exhaust data contains CO
Tópico(s): Advanced Combustion Engine Technologies
2016 - De Gruyter | International Journal of Turbo and Jet Engines
Selçuk Ekici, Yasin Şöhret, Kahraman Coban, Önder Altuntaş, T. Hikmet Karakoç,
... paper presents sustainability indicators of a small scale turbojet engine, operated on micro-aerial vehicles, for discussion ... are evaluated as exergetic sustainability indicators of the turbojet engine under investigation in the current study. The exergy efficiency of the small scale turbojet engine is calculated as 27.25 % whereas the ...
Tópico(s): Advanced Thermodynamics and Statistical Mechanics
2016 - De Gruyter | International Journal of Turbo and Jet Engines
M.A. Ehyaei, A. Anjiridezfuli, Marc A. Rosen,
... analysis is reported of a J85-GE-21 turbojet engine and its components for two altitudes: sea level and 11,000 meters. The turbojet engine with afterburning operates on the Brayton cycle ... and overall engine. The exergy efficiency of the turbojet engine is found to decrease by 0.45% ...
Tópico(s): Advanced Aircraft Design and Technologies
2013 - Vinča Institute of Nuclear Sciences | Thermal Science
... the exergetic and energetic performances for a small turbojet engine for unmanned vehicles. On the basis of ... temperature decreases the exergy efficiency of the small turbojet engine. However, any increase in compressor pressure ratio ... how much improvement is possible for the small turbojet engine to achieve better energy and exergy consumption.
Tópico(s): Gas Dynamics and Kinetic Theory
2012 - Elsevier BV | Energy