Results 11 to 20 of about 410 (178)

Frequency‐Dependent Acoustic Reflection Coefficients of Flat Ground Assessed Using the Sonic Boom From the OSIRIS‐Rex Sample Return Capsule Recorded on Free Flying Balloons

Geophysical Research Letters
Low frequency sound can travel great distances in planetary atmospheres. When these waves reflect off the air/ground interface, energy may be absorbed or transferred to mechanical waves in the subsurface.
Daniel C. Bowman, Jonathan M. Lees, Siddharth Krishnamoorthy, Elizabeth A. Silber, Jacob S. Izraelevitz, Ashish Goel, Emalee Hough, Zach Yap, Mirza Samnani, Michael J. Fleigle, Justin R. LaPierre, James A. Cutts, Attila Komjathy   +12 more
doaj   +2 more sources

Hierarchical optimization method of supersonic low sonic boom configuration

Hangkong gongcheng jinzhan, 2023
Sonic boom suppression is a key technology that must be broken through in the development of a new generation of supersonic civil aircraft. The reasonable design of configuration parameters can make the aircraft have good sonic boom characteristics.
MA Chuang, HUANG Jiangtao, SHU Bowen, LIU Gang, ZHONG Shidong   +4 more
doaj   +1 more source

A low-boom and low-drag design method for supersonic aircraft and its applications on airfoils

Advances in Aerodynamics, 2021
Sonic boom reduction has been an urgent need for the development of future supersonic transport, because of the heavy damage of noise pollution. This paper provides a novel concept for supersonic aircraft to reduce the sonic boom and drag coefficient ...
Liu-qing Ye, Zheng-yin Ye, Kun Ye, Jie Wu, Sheng-jie Miao   +4 more
doaj   +1 more source

Passenger Spaceplanes and Airplanes that Have Variable Configuration for Sonic Boom Reduction [PDF]

INCAS Bulletin, 2018
In the last time, the interest for passenger space plane, supersonic passenger aircraft and supersonic business jets is increasing. For reducing sonic boom effects at ground level, some companies proposed airplanes having fuselage with small traversal ...
Constantin SANDU, Dan BRASOVEANU, Valentin SILIVESTRU, Bogdan FILIPESCU, Radu Constantin SANDU   +4 more
doaj   +1 more source

Numerical Investigation of Influence of Mesh Property in Nearfield Sonic Boom Prediction [PDF]

Xibei Gongye Daxue Xuebao, 2018
To investigate the influence of mesh property in nearfield sonic boom prediction, the over-pressures of several typical configurations are commutated and analyzed with an in-house Reynolds Average Navier-Stokes solver.

doaj   +1 more source

Low-Boom Design for Supersonic Transport with Canard and Forward-Swept Wings Using Equivalent Area Design Method

Aerospace, 2023
Forward-swept wings can be expected to be lower-boom planforms with similar amount of drag as backward-swept wings because of their good lift distributions.
Yuki Kishi, Risato Yashiro, Masahiro Kanazaki   +2 more
doaj   +1 more source

The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments

Applied Sciences, 2022
In this paper, several researches were undertaken related to a violent phenomenon, characterized by a sonic boom, felt on an area of at least 500 km2, shortly followed by the fall of rock fragments that were then recovered from the ground.
Alexandru Cocean, Cristina Postolachi, Georgiana Cocean, Georgiana Bulai, Bogdanel Silvestru Munteanu, Nicanor Cimpoesu, Iuliana Cocean, Silviu Gurlui   +7 more
doaj   +1 more source

Optimal design for low sonic boom based on CoKriging surrogate model

Hangkong gongcheng jinzhan
Accurately predicting and effectively reducing sonic boom levels is one of the key issues in the development of the new generation of green supersonic civil aircraft.
ZHANG Hanqi, XU Yue, ZHONG Min, LI Yan
doaj   +1 more source

A Review of the Current Regulatory Framework for Supersonic Civil Aircraft: Noise and Emissions Regulations

Aerospace, 2023
The request for faster and greener civil aviation is urging the worldwide scientific community and aerospace industry to develop a new generation of supersonic aircraft, which are expected to be environmentally sustainable, and to guarantee a high level ...
Thomas Rötger, Chris Eyers, Roberta Fusaro   +2 more
doaj   +1 more source

Multidisciplinary Design Optimization for the Conceptual Design of Supersonic Civil Aircraft Based on Full-Carpet Sonic Boom/Aerodynamic Characteristics Employing Differential Evolution

Aerospace
Reducing the sonic boom intensity and increasing the cruise lift-to-drag ratio are pivotal technologies for the successful development of supersonic civil aircraft.
Yuyu Duan, Chonweng Wan, Runze Li, Haixin Chen   +3 more
doaj   +1 more source