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Recent technologies for reduction of aircraft propulsion noise. Kokuki engine soon teigenka no saikin no gijutsu shinpo ni tsuite

Journal Article:

Abstract

Inside the jet engine, the propulsion engine for an aircraft, a high speed air current is flowing, and the rotors such as the fan, compress or, turbine and so forth are rotating with a high speed in its flowing current. The flow itself in which a high speed exhaust jet is discharged in the air from engine exhaust port, and the aerodynamic noise generated by an interaction of the flow with the material bodies are the main noise sources of the aircraft engine. Because the supersonic planes are necessary to fly with mach number 2 - 3 during cruising, the turbojet engine with a large jet exhaust speed or the low bypass ratio turbofan engine is selected. Since a noise reduction by reducing the jet exhaust speed, which was an effective measure for the high subsonic speed passenger plane, can not be applied, a reduction of the supersonic jet noise, which is hard to be reduced, becomes a necessity. In addition, in recent years, a research and development of the advanced turbo prop (ATP) aircraft with a further higher thrust efficiency are advanced as well. The aerodynamical noise reduction technologies of these engines for supersonic airplanes are summarized. 14 refs.,  More>>
Authors:
Kobayashi, H [1] 
  1. National Aerospace Lab., Chofu, Tokyo (Japan)
Publication Date:
Mar 10, 1994
Product Type:
Journal Article
Reference Number:
NEDO-94-912109; EDB-94-168461
Resource Relation:
Journal Name: Nippon Gasutabin Gakkaishi (Journal of the Gas Turbine Society of Japan); (Japan); Journal Volume: 21:84
Subject:
42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS; AERODYNAMICS; NOISE; AIRCRAFT; NOISE POLLUTION ABATEMENT; TURBOJET ENGINES; EXHAUST GASES; SUBSONIC FLOW; SUPERSONIC FLOW; AIR FLOW; BLOWERS; COMPRESSORS; TURBINES; ENGINES; EQUIPMENT; FLUID FLOW; FLUID MECHANICS; FLUIDS; GAS FLOW; GASEOUS WASTES; GASES; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; MACHINERY; MECHANICS; POLLUTION ABATEMENT; TURBOMACHINERY; WASTES; 420200* - Engineering- Facilities, Equipment, & Techniques; 330103 - Internal Combustion Engines- Turbine
OSTI ID:
6991632
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0387-4168; CODEN: NGGAEH
Submitting Site:
NEDO
Size:
Pages: 47-53
Announcement Date:

Journal Article:

Citation Formats

Kobayashi, H. Recent technologies for reduction of aircraft propulsion noise. Kokuki engine soon teigenka no saikin no gijutsu shinpo ni tsuite. Japan: N. p., 1994. Web.
Kobayashi, H. Recent technologies for reduction of aircraft propulsion noise. Kokuki engine soon teigenka no saikin no gijutsu shinpo ni tsuite. Japan.
Kobayashi, H. 1994. "Recent technologies for reduction of aircraft propulsion noise. Kokuki engine soon teigenka no saikin no gijutsu shinpo ni tsuite." Japan.
@misc{etde_6991632,
title = {Recent technologies for reduction of aircraft propulsion noise. Kokuki engine soon teigenka no saikin no gijutsu shinpo ni tsuite}
author = {Kobayashi, H}
abstractNote = {Inside the jet engine, the propulsion engine for an aircraft, a high speed air current is flowing, and the rotors such as the fan, compress or, turbine and so forth are rotating with a high speed in its flowing current. The flow itself in which a high speed exhaust jet is discharged in the air from engine exhaust port, and the aerodynamic noise generated by an interaction of the flow with the material bodies are the main noise sources of the aircraft engine. Because the supersonic planes are necessary to fly with mach number 2 - 3 during cruising, the turbojet engine with a large jet exhaust speed or the low bypass ratio turbofan engine is selected. Since a noise reduction by reducing the jet exhaust speed, which was an effective measure for the high subsonic speed passenger plane, can not be applied, a reduction of the supersonic jet noise, which is hard to be reduced, becomes a necessity. In addition, in recent years, a research and development of the advanced turbo prop (ATP) aircraft with a further higher thrust efficiency are advanced as well. The aerodynamical noise reduction technologies of these engines for supersonic airplanes are summarized. 14 refs., 11 figs., 1 tab.}
journal = {Nippon Gasutabin Gakkaishi (Journal of the Gas Turbine Society of Japan); (Japan)}
volume = {21:84}
journal type = {AC}
place = {Japan}
year = {1994}
month = {Mar}
}