METHOD OF DESIGNING AIRFRAME SHAPE OF SUPERSONIC AIRCRAFT, METHOD OF PRODUCING SUPERSONIC AIRCRAFT, AND SUPERSONIC AIRCRAFT

Title:

METHOD OF DESIGNING AIRFRAME SHAPE OF SUPERSONIC AIRCRAFT, METHOD OF PRODUCING SUPERSONIC AIRCRAFT, AND SUPERSONIC AIRCRAFT

Document Type and Number:

WIPO Patent Application WO/2021/186940

Kind Code:

A1

Abstract:

A method of designing the airframe shape of a supersonic aircraft according to one aspect of the present technique involves: obtaining the equivalent cross-sectional area distribution of the initial shape of the airframe on the off-track; setting the target equivalent cross-sectional area distribution of the airframe on the off-track for reducing sonic boom, on the basis of the obtained equivalent cross-sectional area distribution; and reading and adding, as the required, additional cross-sectional area of the cross section of the airframe on an on-track Mach plane of the airframe located in the vicinity of the off-track Mach plane, the required additional cross-sectional area of the cross section of the airframe on an off-track Mach plane that passes through a position in any airflow direction, on the basis of the required additional cross-sectional area distribution that is the difference between the equivalent cross-sectional area distribution and the target equivalent cross-sectional area distribution.

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Inventors:

UENO ATSUSHI (JP)

Application Number:

PCT/JP2021/004341

Publication Date:

September 23, 2021

Filing Date:

February 05, 2021

Export Citation:

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Assignee:

JAPAN AEROSPACE EXPLORATION (JP)

International Classes:

B64C23/04; B64C30/00; B64F5/00; G06F30/10; G06F30/20

Domestic Patent References:

WO2019187828A1	2019-10-03
WO2019187828A1	2019-10-03

Foreign References:

JP5057374B2	2012-10-24
JP5057374B2	2012-10-24

Other References:

ATSUSHI UENO AND YOSHIKAZU MAKINO: "Robust Low-Boom Design in Primary Boom Carpet", AIAA SCITECH 2021 FORUM, 4 January 2021 (2021-01-04), pages 1 - 12, XP009531195, ISBN: 978-1-62410-609-5, DOI: https://doi.org/10.2514/6.2021-1270
CHRISTINE M. DARDEN: "Sonic-Boom Minimization With Nose-Bluntness Relaxation", NASA TP-1348, 1979
TODD E. MAGEEPETER A. WILCOXSPENCER R. FUGALKURT E. ACHESONERIC E. ADAMSONALICIA L. BIDWELLSTEPHEN G. SHAW: "System-Level Experimental Validations for Supersonic Commercial Transport Aircraft Entering Service in the 2018-2020 Time Period Phase I Final Report", NASA/CR-2013-217797, 2013
JOHN MORGENSTERNNICOLE NORSTRUDJACK SOKHEYSTEVE MARTENSJUAN J. ALONSO: "Advanced Concept Studies for Supersonic Commercial Transports Entering Service in the 2018 to 2020 Period Phase I Final Report", NASA/CR-2013-217820, 2013
WU LI, SRIRAM K: "Rallabhandi: Inverse Design of Low-Boom Supersonic Concepts Using Reversed Equivalent-Area Targets", JOURNAL OF AIRCRAFT, vol. 51, no. 1, 2014
IRIAN ORDAZMATHIAS WINTZERSRIRAM K. RALLABHANDI: "Full-Carpet Design of a Low-Boom Demonstrator Concept", AIAA, 2015, pages 2015 - 2261
ATSUSHI UENOMASASHI KANAMORIYOSHIKAZU MAKINO: "Robust Low-Boom Design Based on Near-Field Pressure Signature in Whole Boom Carpet", JOURNAL OF AIRCRAFT, vol. 54, no. 3, 2017
See also references of EP 4122819A4

Attorney, Agent or Firm:

OMORI, Junichi (JP)

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