Results 31 to 40 of about 6,980 (239)

Advances in Experimental Research on the Influence of Friction Powders on Acoustic Liners (Helmholtz Resonators)

Aerospace, 2023
This paper presents the technological advancement of using friction powders to increase the absorption of acoustic liners used in the reduction of tonal noise generated by aero-engines or for other applications related to Helmholtz resonators used in ...
Constantin Sandu, Andrei-George Totu, Andrei-Tudor Trifu, Marius Deaconu   +3 more
doaj   +1 more source

Advances in Solid‐Phase Processing Techniques: Innovations, Applications, and Future Perspectives

Advanced Materials Technologies, EarlyView.
Based on practical manufacturing challenges, this review examines advanced solid‐phase processing techniques that overcome the inherent limitations of conventional melting‐based and traditional solid‐phase manufacturing, enabling the production of higher‐performance components at reduced cost through process innovation and improved supply‐chain ...
Tianhao Wang
wiley   +1 more source

Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

Aerospace
Turbomachinery shock wave patterns occur as a natural result of operating at off-design points and are accountable for some of the loss in performance. In some cases, shock wave–boundary layer (SW-BLIs) interactions may even lead to map restrictions. The
Valeriu Drăgan, Oana Dumitrescu, Mihnea Gall, Emilia Georgiana Prisăcariu, Bogdan Gherman   +4 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

CFD and Experimental Comparison for Micro-Pump Performance in Space Applications: A Case Study

Applied Sciences
This paper presents a case study comparing CFD predictions with experimental measurements for micropumps, with the goal of evaluating the accuracy and limitations of CFD methods in complex microscale geometries.
Oana Dumitrescu, Cristian Dobromirescu, Valeriu Dragan, Ionut Sebastian Vintila, Radu Mihalache   +4 more
doaj   +1 more source

Additively Manufactured Porous Ceramics as Tunable Dielectrics for Passive Temperature Sensing

Advanced Materials Technologies, EarlyView.
Porous ceramic lattices, 3D‐printed from a multicomponent oxide ink, are integrated with LC resonators for passive wireless temperature sensing. By tuning porosity, the dielectric properties and RF response are engineered to produce distinct resonant frequency shifts with temperature. The results establish a structure‐driven approach to customizing the
Sogol Heidarishahrivar, Aminul Islam, Chang Woo Gal, Insup Kim, Yeong‐Jin Choi, Woo Soo Kim   +5 more
wiley   +1 more source

Test Stand for Microjet Engine Prototypes

Machines
To investigate the functionality and performance of a prototype microjet engine, we constructed a versatile test stand tailored to the specifications of a 400 N prototype.
Cornel Mihai Tărăbîc, Grigore Cican, Cristian Olariu, Gabriel Dediu, Răzvan Marius Catană   +4 more
doaj   +1 more source

Mastering Complexity toward High‐Performance Multi‐Principal Element Alloy‐Based Films and Coatings: A Review on Microstructural Regulation and Property Optimization

Advanced Science, EarlyView.
This review provides a comprehensive exploration of microstructure regulation strategies for multi‐principal element alloy‐based films and coatings, with a focus on the interplay between elemental composition, nanoscale architecture, heterostructures and interfacial engineering in tailoring their properties and functions. A systematic analysis of their
Jiaming Cao, Jiayi Sun, Heqing Li, Zhiqiang Wu, Xianghai An   +4 more
wiley   +1 more source

High-Speed Schlieren Analysis of Projectile Kinematics and Muzzle Jet Dynamics in a CO₂-Driven Airsoft Gun

Fluids
Understanding the transient flow phenomena accompanying projectile discharge is essential for improving the safety, efficiency, and predictability of small-scale ballistic systems.
Emilia-Georgiana Prisăcariu, Sergiu Strătilă, Raluca Andreea Roșu, Oana Dumitrescu, Valeriu Drăgan   +4 more
doaj   +1 more source

Operation regimes in a rotating detonation combustor [PDF]

INCAS Bulletin
This paper presents an exploration of the operational envelope of a Rotating Detonation Combustor based on the design of the research group at the University of Southampton.
George Ionut VRABIE, Daniel C. ASOLTANEI, Andrei V. COJOCEA, Mihnea GALL, Ionut PORUMBEL, Alexa CRISAN   +5 more
doaj   +1 more source