Results 181 to 190 of about 10,232 (233)

Biofueled Miniature Turbojet Engine (BIOMITE)

50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
The Busemann Advanced Concepts Lab at the University of Colorado Boulder has been researching improvements to small turbojet engines designed for unmanned aerial vehicles for the past three years. The BIOMITE senior design team has continued this tradition by designing adaptations for a commercial-off-the-shelf US Microjet AT-450 turbojet engine to run
Gregory Rancourt, Donald Gipe, Ryan Starkey   +2 more
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Large Lightweight Turbojet Engines

SAE Technical Paper Series, 1958
<div class="section abstract"><div class="htmlview paragraph">THIS paper deals with the general performance of turbojet engines in both subsonic and supersonic flight in relation to aircraft requirements.</div><div class="htmlview paragraph">The advantages and disadvantages of the bypass engine and small turbojet in relation to ...
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Reduction of Turbojet Engine Noise

2004
The urgency of the problem of jet noise reduction has been rising again at the present stage of aircraft technology development. The main reasons are the following. The studies of attenuation of turbo-machine noise have demonstrated that the jet is one of the main noise sources even in engines with high by-pass ratios.
A. S. Ginevsky, Ye. V. Vlasov, R. K. Karavosov   +2 more
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Production Problems of Turbojet Engines

SAE Technical Paper Series, 1949
<div class="htmlview paragraph">THE production problems associated with turbojet engines are not more complex than those encountered with reciprocating engines, according to the author, but they are of a surprisingly different nature.</div> <div class="htmlview paragraph">For instance, he points out that, whereas reciprocating engine ...
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Variable Structure Control of a Turbojet Engine

1986 American Control Conference, 1986
We study the fuel control problem of a single-spool turbojet engine. A transfer function approximation method is utilized to identify linear models about operating points. Then, a sliding mode control is developed to regulate the fuel flow so that the engine speed and temperature are within their physical constraints, based on the identified linear ...
Chin-Yu Chao, Cheng-Wu Chen, Bor-Chyun Wang   +2 more
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Development study of a precooled turbojet engine

Acta Astronautica, 2010
Abstract A precooled turbojet engine has been developed by JAXA used for the hypersonic airplane and spaceplane. The subscale engine named “S-engine” whose thrust and weight are about 1.2 kN and 100 kg was designed, fabricated and tested. The components and the system firing tests under the sea-level-static condition were successfully conducted.In ...
Tetsuya Sato, Hideyuki Taguchi, Hiroaki Kobayashi, Takayuki Kojima, Katsuyoshi Fukiba, Daisaku Masaki, Keiichi Okai, Kazuhisa Fujita, Motoyuki Hongo, Shujiro Sawai   +8 more
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Automatic Control of Turbojet Engines

Journal of Fluids Engineering, 1949
Abstract This paper presents the requirements for automatic control of a turbojet engine in order to meet the needs of military aviation and to realize the full operational performance of the engine. The author describes how these requirements were established, and outlines the recommended approach to the design of an optimum engine ...
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Working Model of Turbojet Engine

International Scientific Journal of Engineering and Management
The project made to show the working model of Turbojet Engine. The turbojet engine operates on the Brayton cycle and features four primary stages: air intake, compression, combustion, and exhaust. The turbo-jet engine is for high speeds. The working model shows how atmospheric air is taken in and compressed using a multi-stage axial or centrifugal ...
Yashwant A P, Tanushree Kale, Nikita Mane, Purva Rupavate, Gaurav Bankar   +4 more
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Method and apparatus for quieting a turbojet engine

The Journal of the Acoustical Society of America, 1993
A noise suppressor for attachment to the aft end of an existing turbojet engine. The noise suppressor includes a free-running turbofan wheel which includes a turbine section mounted for reaction to the exhaust gas from the jet engine, and a concentric outer fan section extending within an air duct concentric with the turbofan wheel.
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Calculation of Windmilling Characteristics of Turbojet Engines

Journal of Engineering for Power, 1981
The operation of a turbojet engine under windmilling conditions was analyzed and the relationship of engine speed and airflow has been derived. Replacing the efficiencies of compressor and turbine by a total pressure loss coefficient, the author was able to obtain the equations for matching the engine components and the universal curve of windmilling ...
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