Results 61 to 70 of about 39,755 (280)

Numerical and Experimental Analyses of the Effect of Water Injection on Combustion of Mg-Based Hydroreactive Fuels

Aerospace
The energy release process of the Mg-based hydroreactive fuels directly affects the performance of water ramjet engines, and the burning rate is one of the key parameters of the Mg-based hydroreactive fuels.
Shiyao Shao, Songchen Yue, Hong Qiao, Peijin Liu, Wen Ao   +4 more
doaj   +1 more source

Advanced ramjet concepts program [PDF]

Uniquely advantageous features, on both the performance and weight sides of the ledger, can be achieved through synergistic design integration of airbreathing and rocket technologies in the development of advanced orbital space transport propulsion ...
Leingang, J. L.
core   +1 more source

Shuttle orbiter with telescoping main propulsion unit and payload [PDF]

, 1993
An improved Space Shuttle with variable internal volume is provided. The Space Shuttle Orbiter includes a telescoping main propulsion unit. This main propulsion unit contains the main rocket engines and fuel tanks and telescopes into the Space Shuttle. A
Macconochie, Ian O.
core   +1 more source

Numerical Prediction of Deformation‐Induced Martensitic Transformation in Cold‐Sprayed Austenitic Stainless Steel

steel research international, EarlyView.
Cold spray deposition of stainless steel (grade: SS304) is evaluated for marine applications, with emphasis on martensitic transformation during impact. Analytical modeling, simulations, and experiments reveal that helium‐assisted spraying of fine powders promotes cooling below the martensitic start temperature, enabling up to ≈40% austenite to ...
Cal Vin Wong, K. R. Ramkumar, Sougata Roy, Victor K. Champagne, John J. Lee   +4 more
wiley   +1 more source

Research on Ablation Device Suitable for Thermal Protection System of Solid Rocket Ramjet

Aerospace
In solid rocket propulsion systems, overload effects induced by aircraft maneuvers can lead to gas accumulation in the afterburning chamber, resulting in severe localized ablation of thermal insulation layers and significantly compromising overall ...
Jiming Cheng, Hang Yan, Xiping Feng, Guoqiang Zhu, Jie Liu, Xintong Qi   +5 more
doaj   +1 more source

First Vasectomy Procedure Successfully Performed on a Southern African Male Giraffe (Giraffa camelopardalis giraffa)

Zoo Biology, EarlyView.
First successful vasectomy in a southern African male giraffe, Giraffa camelopardis giraffa ABSTRACT This study reports the first successful vasectomy on a southern African male giraffe (Giraffa camelopardalis giraffa). The goal of the procedure was to create a teaser male for reproductive studies.
Francois Deacon, Willem Daffue, Edward Collin Albertyn, Susanna Maria Krüger, Ayanda Maqhashu, Jacquiline Goedhals, Andri Grobbelaar, Marike Badenhorst   +7 more
wiley   +1 more source

The Effects of HMX and CL-20-Based Co-Particles on the Ignition and Combustion Performances of Aluminum Powders

Aerospace
Energetic co-particles have been proven effective in balancing high-energy and safety performance, which might be used as insensitive oxidizers in solid propellants.
Zhihua Xue, Weimeng Zhang, Ruixuan Xu, Sulan Yang, Qilong Yan   +4 more
doaj   +1 more source

Experimental validation of rotating detonation for rocket propulsion. [PDF]

Sci Rep, 2023
Bennewitz JW, Burr JR, Bigler BR, Burke RF, Lemcherfi A, Mundt T, Rezzag T, Plaehn EW, Sosa J, Walters IV, Schumaker SA, Ahmed KA, Slabaugh CD, Knowlen C, Hargus WA.   +14 more
europepmc   +1 more source

Historical problem areas lessons learned [PDF]

Historical problem areas in space transportation propulsion technology are identified in viewgraph form. Problem areas discussed include materials compatibility, contamination, pneumatic/feed system flow instabilities, instabilities in rocket engine ...
Fester, Dale A., Sackheim, Bob
core   +1 more source

EU Space Law and Earth's Boundaries: Integrating Environmental Impact Assessment and Corporate Due Diligence

Global Policy, EarlyView.
ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley   +1 more source