Development of a quiet supersonic aircraft with technology applications to military and civil aircraft

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

The Aeronautical Journal ◽

10.1017/aer.2018.6 ◽

2018 ◽

Vol 122 (1250) ◽

pp. 556-571 ◽

Cited By ~ 2

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.

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International Civil Aviation Organization

International Organization ◽

10.1017/s0020818300025157 ◽

1963 ◽

Vol 17 (1) ◽

pp. 273-276 ◽

Cited By ~ 2

Keyword(s):

Civil Aviation ◽

Sonic Boom ◽

International Agreement ◽

International Civil Aviation Organization ◽

Critical Importance ◽

Radiation Hazards ◽

The Public ◽

Supersonic Aircraft ◽

Operational Characteristics ◽

Civil Aircraft

The Assembly of the International Civil Aviation Organization (ICAO) held its fourteenth session in Rome from August 21 through September 15, 1962, under the presidency of Dr. E. Ortona (Italy). The Assembly adopted measures to assure that the development and use of supersonic civil aircraft would not be detrimental either to the public or to international civil aviation. The ICAO Council was to work toward international agreement on the operational characteristics of critical importance in insuring that supersonic aircraft could fit into the same environment as subsonic aircraft, and also on the problems of noise near airfields, sonic boom, and radiation hazards. A second object of Council concern would be the assessment of the operating requirements of the supersonic aircraft, so that international agreement could also be reached on the ground facilities and services required and the places where these would have to be installed.

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Navigational Equipment in the Supersonic Concorde in 1970

Journal of Navigation ◽

10.1017/s0373463300030812 ◽

1967 ◽

Vol 20 (4) ◽

pp. 490-496

Author(s):

M. Le Bouar

Keyword(s):

Sufficient Time ◽

Supersonic Aircraft ◽

Civil Aircraft ◽

Cent Increase ◽

Conventional Methods ◽

Near Future

A great deal has already been written about the navigational problems presented by the appearance in the near future of supersonic civil aircraft; in this paper I shall try to give a quick description of the methods that will be available in the supersonic Concorde in 1970, with an account of the chief considerations that governed their choice. While there is no doubt that there is a specific navigational problem proper to supersonic aircraft, it does not present itself in as critical a form as some writers believe. When the present-day jets came into service there was not, strictly speaking, any real gap to be bridged. The conventional methods and means used in prop-driven aircraft were taken over, with whatever further adaptations were required for particular cases—such, for example, as polar navigation. In spite of the increase in speed, there was still sufficient time for the navigator to check position and heading at regular intervals.However, the 300 per cent increase in speeds now envisaged (1300 knots = mach 2.2 for the Concorde) introduces a more formidable discontinuity in relation to the standards of today. At a speed of 22 miles a minute it becomes impossible for the navigator to work as rapidly as he must if he is to deal with the information provided by his sensors and carry out the necessary corrections.

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Aircraft Turbine Engine NOx Emission Limits: Status and Trends

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery ◽

10.1115/92-gt-415 ◽

1992 ◽

Cited By ~ 3

Author(s):

D. W. Bahr

Keyword(s):

Nox Emission ◽

Future Generations ◽

Nox Emissions ◽

Aircraft Engines ◽

Turbine Engine ◽

Supersonic Aircraft ◽

Status And Trends ◽

Civil Aircraft ◽

Percent Increase ◽

Emission Limits

Within recent years, the NOx emissions of aircraft engines have received increased attention. More stringent limits on the NOx emissions of future subsonic civil aircraft engines are being considered. A 20 percent increase in the stringency of the existing ICAO standard has been proposed and, for the longer-term, the possibility of further increased stringency is being studied. For future supersonic civil aircraft engines, very stringent goals have been established. To meet these goals, combustor designs with ultralow NOx levels are required. Extensive efforts are, therefore, underway to develop low NOx combustors for use in future generations of both subsonic and supersonic aircraft engines.

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