Interference Effect of Engine Exhaust on Civil Aircraft Drag Performance

2012 ◽  
Vol 49 (6) ◽  
pp. 2001-2006 ◽  
Author(s):  
Weilin Zheng ◽  
Yankui Wang ◽  
Jixiang Shan ◽  
Xueying Deng ◽  
Wei Tian
Keyword(s):  
Interference Effect ◽  
Engine Exhaust ◽  
Civil Aircraft

Noise predictions for a supersonic business jet using advanced take-off procedures

2018 ◽  
Vol 122 (1250) ◽  
pp. 556-571 ◽  
Author(s):  
J. J. Berton ◽  
S. M. Jones ◽  
J. A. Seidel ◽  
D. L. Huff
Keyword(s):  
Jet Noise ◽  
Analytical Models ◽  
Noise Levels ◽  
Engine Exhaust ◽  
Supersonic Aircraft ◽  
Business Jet ◽  
Civil Aircraft ◽  
Noise Assessment ◽  
The Subject ◽  
Specific Thrust

ABSTRACTSupersonic civil aircraft present a unique noise certification challenge. High specific thrust required for supersonic cruise results in high engine exhaust velocity and high levels of jet noise during take-off. Aerodynamics of thin, low-aspect-ratio wings equipped with relatively simple flap systems deepen the challenge. Advanced noise reduction procedures have been proposed for supersonic aircraft. These procedures promise to reduce certification noise levels, but they may require departures from normal reference procedures defined in noise regulations. The subject of this article is a take-off performance and noise assessment of a notional supersonic business jet. Analytical models of an airframe and a supersonic engine derived from a contemporary subsonic turbofan core are developed. These models are used to predict take-off trajectories and certification noise levels. Results indicate advanced take-off procedures are helpful in reducing noise along lateral sidelines.

COMPUTATIONAL AND EXPERIMENTAL STUDIES OF A LOW-EMISSION BURNER FOR A PERSPECTIVE TURBOJET ENGINE WITH THE COMPRESSION RATIO EXCEEDING 40

2020 ◽  
Author(s):  
M. A. Danilov ◽  
◽  
M. V. Drobysh ◽  
A. N. Dubovitsky ◽  
F. G. Markov ◽  
...  
Keyword(s):  
Compression Ratio ◽  
Experimental Studies ◽  
The Other ◽  
Aircraft Engines ◽  
Engine Efficiency ◽  
Other Hand ◽  
Turbojet Engine ◽  
Low Emission ◽  
Civil Aircraft ◽  
The One

Restrictions of emissions for civil aircraft engines, on the one hand, and the need in increasing the engine efficiency, on the other hand, cause difficulties during development of low-emission combustors for such engines.

CRUCIBLE 347

Alloy Digest ◽  
1983 ◽  
Vol 32 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Aircraft Engine ◽  
Heat Treating ◽  
Nickel Steel ◽  
Annealed Condition ◽  
Engine Exhaust ◽  
Cold Worked ◽  
Specialty Metals

Abstract CRUCIBLE F347 is a non-hardenable austenitic chromium-nickel steel that is particularly adaptable for use at temperatures between 800 and 1650 F. It is non-magnetic in the annealed condition but is slightly magnetic in the cold-worked condition. Among its many applications are aircraft-engine exhaust manifolds, boiler shells and high-temperature handling equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-436. Producer or source: Crucible Specialty Metals Division, Colt Industries.

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