Results 21 to 30 of about 454 (211)

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

Why does the Falcon-9 booster make a triple sonic boom during flyback? An initial analysis [PDF]

JASA Express Letters
When the SpaceX Falcon-9 rocket booster descends through the atmosphere after a launch, it produces a sonic boom with three shocks in the far field, rather than the usual two-shock N-wave.
Mark C. Anderson, Kent L. Gee
doaj   +1 more source

Sonic Boom Prediction Code Development and Sonic Boom Predictions via Open Source CFD Software

Havacılık ve Uzay Teknolojileri Dergisi, 2022
In the present work a sonic boom prediction code which numerically solves the Augmented Burgers equation using the operator-splitting approach was developed.
Emre Alpman, Levent A. Kavurmacıoğlu, Seher Eken, Harun İnci, Zeliha Çamur, Barış Biçer   +5 more
doaj  

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Research on the layout design and optimization method for low drag and low sonic boom supersonic civil aircraft

Kongqi donglixue xuebao
Supersonic civil aircraft have become one of the important directions for the future development of civil aviation. For the rapid conceptual design and performance optimization of supersonic civil aircraft layouts, an aerodynamic optimization framework ...
Qinze Zheng, Yu Liang, Chong Pan, Lifeng Wang   +3 more
doaj   +1 more source

Coaxial Melt Electrowriting

Advanced Materials Technologies, EarlyView.
Coaxial melt electrowriting is established to produce dual‐property microfibers with diameters spanning 1.6–29.2 µm. Stable coaxial laminar flow is preserved under electrohydrodynamic thinning, enabling controlled binary and gradient material switching within individual continuous fibers.
Patrick C. Hall, D. Iman von Briesen, Maya Kasteleiner, Gabriela M. Bailey, Diana Ostojich, Harrison W. Reid, Andre Olarra, Benjamín J. Alemán, Simon Luposchainsky, Biranche Tandon, Ramesh Jasti, Paul D. Dalton   +11 more
wiley   +1 more source

Radiation‐Induced Tumor‐Intrinsic LTβR N‐Glycosylation Suppresses Pyroptosis Through TRIM28‐Mediated PCBP2 SUMOylation to Promote Gastric Cancer Radioresistance

Advanced Science, EarlyView.
Radiotherapy triggers LTβR N‐glycosylation, enhancing its overall protein stability and nuclear retention. This accumulation drives TRIM28‐mediated PCBP2 SUMOylation, suppressing pyroptosis and conferring gastric cancer radioresistance. Therapeutically, a targeted nanoplatform (cRGD‐Lipo@EMD) effectively disrupts this regulatory axis, offering a highly
Weijie Zang, Yunlong Ji, Chunwang Zhou, Xiwen Li, Zhuang Lu, Guangze Zhang, Yu Chen, Wanjiang Xue, Yilin Hu   +8 more
wiley   +1 more source

Starship super heavy acoustics: Far-field noise measurements during launch and the first-ever booster catch [PDF]

JASA Express Letters
Far-field (9.7–35.5 km) noise measurements were made during the fifth flight test of SpaceX's Starship Super Heavy, which included the first-ever booster catch. Key results involving launch and flyback sonic boom sound levels include (a) A-weighted sound
Kent L. Gee, Noah L. Pulsipher, Makayle S. Kellison, Logan T. Mathews, Mark C. Anderson, Grant W. Hart   +5 more
doaj   +1 more source