Engine-propeller power plant aircraft community noise reduction key methods

2018 ◽  
Author(s):  
Moshkov P. A. ◽  
Samokhin V. F. ◽  
Yakovlev A. A.
Keyword(s):  
Power Plant ◽  
Noise Reduction ◽  
Community Noise

scholarly journals ABOUT THE COMMUNITY NOISE PROBLEM OF THE LIGHT PROPELLER AIRCRAFT

Akustika ◽  
2019 ◽  
Vol 34 ◽  
pp. 66-71
Author(s):  
Petr Moshkov ◽  
Valery Samokhin ◽  
Alexey Yakovlev
Keyword(s):  
Power Plant ◽  
Noise Reduction ◽  
Low Noise ◽  
Housing System ◽  
Engineering Analysis ◽  
Noise Sources ◽  
Community Noise ◽  
Noise Data ◽  
Reduction Methods ◽  
Design Power

A light aircraft community noise problem was considered. Basic aircraft noise sources were described. A model was presented to evaluate engine-propeller aircraft power plant noise that may be used while estimating both light aircraft community noise and flight paths providing aircraft inaudibility in the housing system area adjacent to an airfield. An effective engineering analysis agreement of experimental and design power plant noise data has been given. Major light aircraft communication noise reduction methods have been considered. The principal future investigation directions were stated to provide scientific-and-engineering experience in developing present-day low-noise light aircraft has been developed.

КОНЦЕПЦІЯ СТВОРЕННЯ СИЛОВОЇ УСТАНОВКИ СІМЕЙСТВА РЕГІОНАЛЬНИХ ПАСАЖИРСЬКИХ ЛІТАКІВ АН-148/АН-158

2019 ◽  
pp. 50-63
Author(s):  
О. Д. Донець ◽  
В. П. Іщук
Keyword(s):  
Power Plant ◽  
Noise Reduction ◽  
Fuel Consumption ◽  
Electronic System ◽  
Electronic Control ◽  
Level Of Automation ◽  
Auxiliary Power ◽  
Power Plant Control ◽  
Technical Status ◽  
Air Intake

The basic results of calculation and research works carried out in the process of creation of power unit of regional passenger airplanes’ family are given. The design features of the propulsion engines and engine of the auxiliary power plant are described. The aforementioned propulsion system includes propulsion engines D-436-148 and engine AI-450-MS of auxiliary power plant. In order to comply with the requirements of Section 4 of the ICAO standard (noise reduction of the aircraft in site), in part of ensuring the noise reduction of engines, when creating the power plant of the An-148/An-158 aircraft family, a single- and double-layer acoustic filler was used in the structure of the engine nacelle and air intake. The use of electronic system for automatic control of propulsion engines such as FADEC and its integration into the digital airborne aircraft complex ensured the operation of engines, included in the power plant provided with high specific fuel consumption, as well as increased the level of automation of the power plant control and monitoring, and ensured aircraft automation landing in ICAO category 3A. In addition, the use of the aforementioned electronic system, allowed to operate the power plant of the aircraft in accordance with technical status. The use of the AI-450-MS auxiliary power plant with an electronic control system such as FADEC, and the drive of the service compressor from a free turbine, eliminated the effect of changes in power and air takeoff, on the deviation of the engine from optimal mode, which also minimized the fuel consumption. The use of fuel metering system TIS-158, allowed to ensure control of its condition and assemblies, without the use of auxiliary devices, built-in control means. In the fire protection system, the use of the electronic control and monitor unit, as well as the use of digital serial code for the exchange of information between the elements of the system and the aircraft systems, has reduced the number of connections, which increased the reliability of the system and reduced its weight characteristics.

Community Noise Reduction of Supersonic Business Jet

2004 ◽  
Vol 3 (3) ◽  
pp. 289-295
Author(s):  
Arthur A. Mirzoyan ◽  
Taras Yu. Chaika ◽  
Andrey V. Ilyin
Keyword(s):  
Noise Reduction ◽  
Community Noise ◽  
Business Jet

scholarly journals Оценка эффективности капотов подвесных моторов маломерного судна в реальных условиях эксплуатации

2020 ◽  
Vol 44 (3) ◽  
pp. 87-92
Author(s):  
Keyword(s):  
Power Plant ◽  
Noise Reduction ◽  
Water Transport ◽  
Power Plants ◽  
Multilayer Structures ◽  
State Technical ◽  
Hardware Complex ◽  
Marine Engines ◽  
Considerable Problem ◽  
Software And Hardware

Шум энергетических установок судов различного типа и назначения – актуальная проблема не только для экипажа, но и для окружающей среды. Снижение шума судовых двигателей, включая подвесные лодочные моторы, производится с применением шумоизолирующих конструкций, но многослойные конструкции с различными гидравлическими наполнителями практически не рассматриваются. В данной статье мы попытались экспериментально оценить эффективность применения капота многослойной конструкции с использованием подвесного лодочного мотора «Ханкай 4.0» в сравнении с различными шумоизолирующими капотами в реальных условиях эксплуатации. Определено, что применение стандартного пластикового капота дает снижение шума некапотируемого мотора на 9,3%; шумоизолирующего капота – на 10,1%; многослойного капота – на 12,5%, что говорит о перспективности подобных разработок на водном транспорте. Ключевые слова: шум судовой энергетической установки, шумоизолирующий капот, маломерное судно, подвесной лодочный мотор The noise of power plants of various types and purposes is a considerable problem not only for the crew, but also for the environment, so reducing the noise of marine engines, including outboard motors, is an urgent and necessary task. At present, noise reduction is performed using noise-insulating structures, but multilayer structures with various hydraulic fillers are practically not considered. This study examines the use of a multi-layer hood with the use of a popular Russian outboard motor «Hangkai 4.0». The purpose of the study is to evaluate the effectiveness of various noise – insulating hoods, in real conditions of operation. The experiments were conducted by specialists of the Department Operation of water transport of the Astrakhan State Technical University using the software and hardware complex «Ecophysics-110A». As a result of experiments, it was determined that the use of a standard plastic hood reduces the noise of an unpowered motor by 9,3%; a noise-isolating hood by 10,1%; a multi-layer hood by 12,5%, which indicates the prospects for such developments in water transport. Keywords: ship power plant noise, noise-isolating hood, small vessel, outboard boat motor.

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