Results 81 to 90 of about 130,331 (289)

A theoretical investigation of noise reduction through the cylindrical fuselage of a twin-engine, propeller-driven aircraft [PDF]

Interior noise in the fuselage of a twin-engine, propeller-driven aircraft with two propellers rotating in opposite directions is studied analytically. The fuselage was modeled as a stiffened cylindrical shell with simply supported ends, and the effects ...
Bhat, R. B., Mixson, J. S.
core   +1 more source

Functional Metal Complexes for Solar–Light‐Driven Energy Conversion

Advanced Materials, EarlyView.
This review provides an exhaustive summary of the recent advancements of functional metal complexes in solar‐to‐electrical, ‐chemical, and ‐thermal energy conversion, comprising material categories, design strategies, underlying principles of operation, and identified improvement of performances.
Yanyan Qin, Dou Luo, Miao Zhang, Wai‐Yeung Wong   +3 more
wiley   +1 more source

Effect of angular inflow on the vibratory response of a counter-rotating propeller [PDF]

This report presents the results of a propeller vibratory stress survey on the Fairey Gannet aircraft aimed at giving an assessment of the difference in vibratory response between single and counter-rotating propeller operation in angular inflow.
Brown, P. C., Turnberg, J. E.
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Numerical Study of the Scale Effect on Flow Around a Propeller Using the CFD Method

Polish Maritime Research
This paper presents an investigation of the scale effect on the flow around a propeller using the CFD method. The differences in the numerical setup and the results obtained for the characteristics of an open water propeller are described and analysed in
Van-Vu Huynh, Le Tat-Hien, Thien Doan Minh, Tao Tran Van, Ngoc Tu Tran   +4 more
doaj   +1 more source

3D CFD Simulation and Experimental Validation of Small APC Slow Flyer Propeller Blade

Aerospace, 2017
The current work presents the numerical prediction method to determine small-scale propeller performance. The study is implemented using the commercially available computational fluid dynamics (CFD) solver, FLUENT. Numerical results are compared with the
Hairuniza Ahmed Kutty, Parvathy Rajendran   +1 more
doaj   +1 more source

A shock wave approach to the noise of supersonic propellers [PDF]

To model propeller noise expected for a turboprop aircraft, the pressure ratio across the shock at the propeller tip was calculated and compared with noise data from three propellers.
Dittmar, J. H., Rice, E. J.
core   +1 more source

Statistics of Neutron Stars at the Stage of Supersonic Propeller

, 2005
We analyze the statistical distribution of neutron stars at the stage of a supersonic propeller. An important point of our analysis is allowance for the evolution of the angle of inclination of the magnetic axis to the spin axis of the neutron star for ...
A. F. Illarionov, J. Arons, L. Mestel, M. A. Ruderman, N. R. Ikhsanov, R. E. Davies, R. E. Davies, S. A. Eliseeva, V. F. Schwarzman, V. M. Lipunov, V. M. Lipunov, V. M. Lipunov, V. S. Beskin, V. S. Beskin, V. S. Beskin   +14 more
core   +3 more sources

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

Study of the resistance offered by propellers rotating on an airstream [PDF]

This report presents a series of tests conducted to verify the formula for thrust P = q(exp 2) D(exp 2) V(exp 2), where P represents thrust, V the velocity of the airstream, D the diameter of the propeller, and q the lifting quality of a comparative ...
Lame, M
core   +1 more source