Basics of Mixer-Ejectors for Quiet Propulsion

Bridges, Jackie; Zaman, K. B. M. Q.; Heberling, Brian

doi:10.2514/6.2020-2505

Cited by 5 publications

(1 citation statement)

References 20 publications

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“…Сегодня в мире активно ведутся исследования по формированию рационального облика двигателя для СПС [63]. Обычно для военных сверхзвуковых самолётов используются двигатели с низкой степенью двухконтурности [61], так как они обеспечивают высокие значения удельной тяги и низкое аэродинамическое сопротивление на сверхзвуковых режимах полёта. Однако для двигателей с низкими значениями степени двухконтурности характерны высокие значения скорости истечения реактивной струи, а следовательно высокий уровень шума.…”

Section: рис 2 некоторые варианты компоновок сверхзвуковых пассажирск...unclassified

The problems of creating a propulsion system of a new generation supersonic passenger aircraft (review)

Alendar¹,

Lanshin²,

Evstigneev³

et al. 2023

VESTNIK of Samara University. Aerospace and Mechanical Engineer

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The problems of creating a propulsion system for a new generation supersonic passenger aircraft are considered on the basis of a review of the work on the supersonic transport being carried out in the world. It is shown that the desire to achieve high flight performance and commercial effectiveness of a supersonic passenger aircraft while meeting up-to-date environmental requirements leads to contradictory technical solutions regarding the propulsion system: the location and number of engines, the scheme of the air intake and nozzle, the choice of the scheme and design parameters of the engine, the use of new high-temperature materials in the engine hot section, etc. The features of the operating conditions of the engine components of a supersonic passenger aircraft in comparison with the engines of up-to-date subsonic civil aviation aircraft and supersonic military aircraft are indicated. The calculated estimates of the influence of various technical solutions on the parameters of the supersonic passenger aircraft engine are given. Due to the complexity and multi-criterion nature of the task of creating a supersonic passenger aircraft propulsion system, its solution requires an integrated approach based on close cooperation of specialists in airframe aerodynamics, engine, etc.

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Section: рис 2 некоторые варианты компоновок сверхзвуковых пассажирск...unclassified

The problems of creating a propulsion system of a new generation supersonic passenger aircraft (review)

Alendar¹,

Lanshin²,

Evstigneev³

et al. 2023

VESTNIK of Samara University. Aerospace and Mechanical Engineer

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Variable Noise Reduction Systems for a Notional Supersonic Business Jet

Berton

2023

Journal of Aircraft

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A variable noise reduction system consists of equipment on board an airplane that is designed to reduce noise in the vicinity of airports. They are anticipated to be used on supersonic civil aircraft currently under development by industry. They are investigated in this paper for a notional 55,000 kg supersonic business jet. The airplane concept was developed by NASA for use in environmental impact studies conducted by the International Civil Aviation Organization. The variable noise reduction system investigated implements a programmed thrust lapse procedure and a programmed flap retraction procedure. The procedures are expected to reduce noise in aircraft certification as well as in operational practice. Behavior of the aircraft in a noise certification setting is considered. Variables of the procedures are optimized to reduce noise levels. The optimization results in a reduction of 5.2 decibels (in the cumulative effective perceived noise level, measured in EPNdB) relative to levels reported previously. Certification considerations unique to these systems are discussed for transport-category large airplanes and jet-powered airplanes. A novel method for evaluating lateral noise is used.

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Variable Mixing Nozzle Design with Slotted Vortex Generators for Jet Noise Reduction

Burt

2020

Aiaa Aviation 2020 Forum

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Basics of Mixer-Ejectors for Quiet Propulsion

Cited by 5 publications

References 20 publications

The problems of creating a propulsion system of a new generation supersonic passenger aircraft (review)

The problems of creating a propulsion system of a new generation supersonic passenger aircraft (review)

Variable Noise Reduction Systems for a Notional Supersonic Business Jet

Variable Mixing Nozzle Design with Slotted Vortex Generators for Jet Noise Reduction

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