Results 41 to 50 of about 33,835 (216)

Identification of Noise Sources in a Realistic Turbofan Rotor Using Large Eddy Simulation

Acoustics, 2020
Large Eddy Simulation is performed using the NASA Source Diagnostic Test turbofan at approach conditions (62% of the design speed). The simulation is performed in a periodic domain containing one fan blade (rotor-alone configuration). The aerodynamic and
Pavel Kholodov, Stéphane Moreau
doaj   +1 more source

Experimental Analysis of Rotor Blade Noise in Edgewise Turbulence

Aerospace, 2023
This paper presents an experimental investigation into the effects of turbulence ingestion on the aerodynamic noise characteristics of rotor blades in edgewise flight. A small-scaled, two-bladed rotor was used in the study.
Nur Syafiqah Jamaluddin, Alper Celik, Kabilan Baskaran, Djamel Rezgui, Mahdi Azarpeyvand   +4 more
doaj   +1 more source

Critical Coupling in Semi‐Trasparent Fano Resonators for Photothermal Converters

Advanced Functional Materials, EarlyView.
An ultrathin metal–insulator multilayer architecture is engineered to exploit Fano‐resonant critical coupling, completely suppressing optical reflectance while achieving a balanced 50:50 trade‐off between absorbance and transmittance. Upon laser excitation at resonance, the metamaterial generates intense localized heat (ΔT≈550∘C$\Delta T {\approx }550^\
Giuseppe Emanuele Lio, Giuseppe Nicoletta, Roberto Caputo, Antonio Ferraro   +3 more
wiley   +1 more source

Comparison between android applications and Class-I sound level meters in SPL measurement performance

Acta Acustica
Accurate measurement of sound pressure level (SPL) is a cornerstone for understanding acoustic communication, animal behavior, and ecological dynamics. Acoustic signals can be broadly categorized into broadband and tonal sounds.
Sasindran Shwetha, Devanand Nambukalithoppil, Srinivas Chelakkara Lakshmanan, Deb Rittik   +3 more
doaj   +1 more source

Deformation‐Tolerant Functional Elastomer Overlayers for Haze‐Assisted Light Extraction and Color Conversion in Stretchable Mechanoluminescent Films

Advanced Functional Materials, EarlyView.
Functional elastomer overlayers are integrated onto stretchable ZnS:Cu‐PDMS mechanoluminescent films to regulate light after emission without modifying the emissive composite. NLC‐PU provides haze‐assisted light extraction to enhance green mechanoluminescence, while DCM‐NLC‐PU combines green‐to‐yellow‐orange color conversion with enhanced outward light
Gyudam Jeon, Seongkyu Song, Soon Moon Jeong, Na Young Ha   +3 more
wiley   +1 more source

Scalable Fabrication of Thermally Reconfigurable Ge Metasurfaces Using Stencil Lithography for Mid‐Infrared Molecular Fingerprinting

Advanced Functional Materials, EarlyView.
Scalable stencil lithography enables resist‐free fabrication of high‐index Ge metasurfaces for mid‐infrared molecular fingerprinting. Reversible thermo‐optic tuning provides post‐fabrication spectral control for precise resonance–vibration mode alignment, enabling enhanced molecular fingerprinting of microplastic particles.
Shovasis Kumar Biswas, Samir Rosas, Wihan Adi, Aidana Beisenova, Vaishakh Unnikrishnan, Furkan Kuruoglu, Filiz Yesilkoy   +6 more
wiley   +1 more source

Numerical and Experimental Investigations of Modal Coherence Characteristics for the Determination of Broadband Noise in Flow Ducts

Frontiers in Energy Research, 2022
This paper presents a detailed investigation about the modal coherence characteristics of turbomachinery noise. The modal coherence characteristics of ducted noise at high frequencies are investigated by establishing three kinds of ducted sound source ...
Kunbo Xu, Cunliang Liu, Fan Tong, Weiyang Qiao   +3 more
doaj   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Research on noise reduction for broadband aeroacoustic noise of hollow roof spoilers

Kongqi donglixue xuebao
The hollow roof spoiler, a key rear-exterior styling component of passenger vehicles, tends to generate broadband aeroacoustic noise when the vehicle travels at elevated speeds, thereby compromising the acoustic comfort of second-row occupants.
Yadong Zhang, Hao Wang, Qiuli Luo, Guangqing Liao, Fengli Zhang, Tianheng Xiong, Chuang Kong   +6 more
doaj   +1 more source