Results 71 to 80 of about 1,571,082 (390)

New method used to fabricate light-weight heat exchanger for rocket motor [PDF]

, 1964
A grooved capstrip, to straddle the metal edges of regenerative cooling channels, increases the strength and heat transfer characteristics of lightweight motor cases. This capstrip is so designed as to form a firm joint between the channels that form the
Baehr, E. F.
core   +1 more source

Numerical Analysis of a Supercritical Heat Transfer of Cryogenic Methane in Regeneratively Cooled Rocket Engine [PDF]

INCAS Bulletin
A comparative study of supercritical heat transfer in a regeneratively cooled rocket engine was conducted using three-dimensional numerical simulations for two channel geometries: rectangular and square. Various constant heat fluxes, flow velocities, and
Mohammed Amine DJEFFAL, Nabil BENAMARA, Abdelkader LAHCENE, Ali BENOUAR, Abdelkader BOULENOUAR, Mohammed MERZOUG   +5 more
doaj   +1 more source

Joule‐Assisted Nanotherapeutic Urethral Stent (JANUS) for Spatiotemporal Theragenerative Treatment of Urethral Strictures

Advanced Functional Materials, EarlyView.
Joule‐assisted nanotherapeutic urethral stent harnesses a smart, biodegradable magnesium stent to orchestrate spatiotemporal theragenerative therapy for urethral strictures. Magnetically induced Joule heating enables on‐demand drug release and bacterial ablation, while simultaneously guiding urothelial regeneration.
Yuhyun Na, Yubeen Park, Hyun Lee, Song Hee Kim, Seojoon Bang, Hyeong Seok Kang, Chan Ho Moon, Ju Yeong Gwon, Jong Hwa Seo, Min‐Ho Kang, Soo‐Hong Lee, Gi Doo Cha, Wooram Park, Heemin Kang, Jung‐Hoon Park, Hyun‐Do Jung   +15 more
wiley   +1 more source

Engineering the Hierarchical Porosity of Granular Hydrogel Scaffolds Using Porous Microgels to Improve Cell Recruitment and Tissue Integration

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
By fabricating and covalently assembling gelatin methacryloyl (GelMA) porous microgels, a new class of granular hydrogel scaffolds with hierarchical porosity is developed. These scaffolds have a significantly higher void fraction than their counterparts made up of nonporous microgels, enhancing cell recruitment and tissue integration. This research may
Alexander Kedzierski, Sina Kheirabadi, Arian Jaberi, Zaman Ataie, Catherine L. Mojazza, Marisa L. Williamson, Anton M. Hjaltason, Aneesh Risbud, Yuanhui Xiang, Amir Sheikhi   +9 more
wiley   +1 more source

A H2 PEM fuel cell and high energy dense battery hybrid energy source for an urban electric vehicle [PDF]

, 2005
Electric vehicles are set to play a prominent role in addressing the energy and environmental impact of an increasing road transport population by offering a more energy efficient and less polluting drive-train alternative to conventional internal ...
Bingham, C M, Schofield, N, Yap, H T
core   +1 more source

Material Composition Gradient Controls the Autonomous Opening of Banksia Seed Pods in Fire‐Prone Habitats

Advanced Functional Materials, EarlyView.
The seed pod valves of Australian Banksia attenuata plants are not simply bi‐layers which bend when dry. These experiments and models reveal complex mechanics, which allow seed release only after several steps of seed pod opening. Stiffness gradients prevent delamination of the valves during loading, and a shape‐memory function protects the seeds ...
Friedrich Reppe, Lorenzo Guiducci, Rivka Elbaum, Peter Werner, John W. C. Dunlop, David J. Merritt, Peter Fratzl, Michaela Eder   +7 more
wiley   +1 more source

Wetting of Surface Grafted Hydrophilic‐b‐Hydrophobic Block Copolymer Brushes

Advanced Functional Materials, EarlyView.
The wetting properties of surface grafted diblock copolymer brushes are influenced by the thickness of the hydrophilic bottom block and the hydrophobic top block. The surface adapts in presence of water and the contact angles of the bottom block shine through. Abstract The wetting of diblock copolymer brushes by water is studied.
Benjamin Leibauer, Andres de los Santos Pereira, Diego Fernando Dorado Daza, Y. Wang, A.S. Hazrah, Ognen Pop‐Georgievski, Hans‐Jürgen Butt, Rüdiger Berger   +7 more
wiley   +1 more source

Supercharged topping rocket propellant feed system [PDF]

, 1979
A rocket propellant feed system utilizing a bleed turbopump to supercharge a topping turbopump is presented. The bleed turbopump is of a low pressure type to meet the cavitation requirements imposed by the propellant storage tanks.
Ginsburg, A., Hartmann, M. J., Stewart, W. L.   +2 more
core   +1 more source

Injection locking of an electro-optomechanical device

, 2017
The techniques of cavity optomechanics have enabled significant achievements in precision sensing, including the detection of gravitational waves and the cooling of mechanical systems to their quantum ground state. Recently, the inherent non-linearity in
Baker, Christopher, Bekker, Christiaan, Bowen, Warwick P., Kalra, Rachpon   +3 more
core   +1 more source

Experimental study on transcritical Rankine cycle (TRC) using CO2/R134a mixtures with various composition ratios for waste heat recovery from diesel engines [PDF]

, 2020
A carbon dioxide (CO2) based mixture was investigated as a promising solution to improve system performance and expand the condensation temperature range of a CO2 transcritical Rankine cycle (C-TRC).
Feng, W, Liu, P, Shi, L, Shu, G, Tian, H, Wang, X   +5 more
core   +1 more source