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

    【課題】超音速航空機の環境適合性における主要課題であるソニックブーム低減と空港離着陸時のジェット騒音低減の両方を解決する。【解決手段】超音速航空機は、機体の胴体に取り付けられたエンジンナセルに収容されたジェットエンジンから噴出されるエンジン排気流を遮蔽することにより前記エンジン排気流によるソニックブームを低減する遮蔽体と、前記エンジンナセルの排気口に設けられ、前記遮蔽体が前記エンジン排気流の高周波数成分を遮蔽することが可能な位置に高周波数成分の音源を発生させることにより前記高周波数成分のジェット騒音を低減し、前記エンジン排気流の低周波数成分と外気流との混合を促進することにより低周波数成分のジェット騒音を低減する排気ノズルとを具備する。【選択図】図9


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    Title :

    SUPERSONIC AIRCRAFT AND SONIC BOOM AND JET NOISE REDUCTION METHOD


    Additional title:

    超音速航空機、並びにソニックブーム及びジェット騒音の低減方法


    Contributors:

    Publication date :

    2022-09-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02K JET-PROPULSION PLANTS , Strahltriebwerke / B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



    SUPERSONIC AIRCRAFT AND SONIC BOOM REDUCTION METHOD

    UENO ATSUSHI / YUHARA TATSUNORI / KANAMORI MASASHI | European Patent Office | 2019

    Free access

    SONIC BOOM ANALYSIS OF DIFFERENT SUPERSONIC AIRCRAFT

    Glorioso, A. / Petrosino, F. / Barbarino, M. et al. | DataCite | 2024


    Sonic boom -- Limitations on supersonic aircraft operations

    Patterson, D.W. | Engineering Index Backfile | 1960



    Sonic boom impact on the supersonic aircraft design

    Balis Crema, L. / Castellani, A. / East-European Acoustical Association | British Library Conference Proceedings | 1994