Title:
SUPERSONIC AIRCRAFT AND SONIC BOOM AND JET NOISE REDUCTION METHOD
Document Type and Number:
Japanese Patent JP2022129373
Kind Code:
A
Abstract:
To achieve both a reduction in sonic boom and jet noise when a supersonic aircraft takes off and lands at an airport which are the main issues with environmental compatibility of the supersonic aircraft.SOLUTION: A supersonic aircraft comprises: a shielding body which reduces sonic boom, due to an engine exhaust stream discharged from a jet engine stored in an engine nacelle attached to a fuselage of an airframe, through shielding the engine exhaust stream; and an exhaust nozzle which is installed at an exhaust port of the engine nacelle, reduces a high-frequency content of jet noise through generating a sound source of the high-frequency content at a position where the shield body can shield the high-frequency content of the engine exhaust stream, and reduces a low-frequency content of the jet noise through enhancing mixing of the low-frequency content of the engine exhaust stream with an external air flow.SELECTED DRAWING: Figure 9
Inventors:
AKATSUKA JUNICHI
Application Number:
JP2022015476A
Publication Date:
September 05, 2022
Filing Date:
February 03, 2022
Export Citation:
Assignee:
NAT RES & DEVELOPMENT AGENCY JAPAN AEROSPACE EXPLORATION AGENCY
International Classes:
B64C5/00; B64D33/00; B64C30/00; B64D27/20; B64D29/04; B64D33/04; F02K1/44
Attorney, Agent or Firm:
Patent Business Corporation Minami Aoyama International Patent Office
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