Results 121 to 130 of about 863,762 (375)

Study and Characterization of Intermediates Used in the Production of the Oxidizer Ammonium Dinitramide

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT The aerospace industry is continually seeking materials that offer higher performance and lower environmental impact. In chemical propulsion, ammonium dinitramide (ADN) represents a significant advance in this direction as a potential replacement for ammonium perchlorate in solid propellant formulations.
Josiane R. C. Silva, Lucas B. Oliveira, Jessica O. Silva, Letícia M. S. V. Queiroz, Kamila P. Cardoso, Márcio Y. Nagamachi, Luiz F. A. Ferrão   +6 more
wiley   +1 more source

Development and Hot-fire Testing of Additively Manufactured Copper Combustion Chambers for Liquid Rocket Engine Applications

, 2017
NASA and industry partners are working towards fabrication process development to reduce costs and schedules associated with manufacturing liquid rocket engine components with the goal of reducing overall mission costs. One such technique being evaluated
P. Gradl, S. Greene, C. Protz, D. Ellis, B. Lerch, I. Locci   +5 more
semanticscholar   +1 more source

Collapsible nozzle extension for rocket engines Patent [PDF]

, 1970
Development of collapsible nozzle extension for rocket ...
Darrow, W. E., Jr., Ursery, B. C.
core   +1 more source

Tandem Solar Cell Approach: Unveiling the Potential of Rudorffite/Silicon Combinations for Providing the Best Solar Cell Performance

physica status solidi (a), EarlyView.
This integrated rudorffite/silicon tandem solar cell in a monolithic configuration is investigated for the first time. The highest efficiency possible in single junctions is achieved for Ag3BiI6 (15.26%), Ag2BiI5 (10.59%), and AgBiI4 (10.44%) in the p–i–n configurations. In tandem solar cells with Ag3BiI6, Ag2BiI5, and AgBiI4 structures, maximum record
Md. Arif Ul Islam, Ovijit Das, Dev Bahadur Khadka, Shinya Kato, Tetsuo Soga   +4 more
wiley   +1 more source

Numerical modelling of the hybrid rocket engine performance

Propulsion and Power Research, 2021
M. Gieras, Aleksander Gorgeri
semanticscholar   +1 more source

System Design and Launch of a Hybrid Rocket with a Star-Fractal Swirl Fuel Grain Toward an Altitude of 15 km

Applied Sciences
To achieve low-cost and on-demand launches of microsatellites, the authors have been researching and developing a micro hybrid rocket since 2014. In 2018, a ballistic launch experiment was performed using the developed hybrid rocket, where it reached an ...
Atsushi Takano, Keita Yoshino, Yuki Fukushima, Ryuta Kitamura, Yuki Funami, Kenichi Takahashi, Akiyo Takahashi, Yoshihiko Kunihiro, Makoto Miyake, Takuma Masai, Shizuo Uemura   +10 more
doaj   +1 more source

Study of Hot Gas Pressurizing System Tank and Liquid Rocket Engine Interaction by Dynamic Simulation [PDF]

فصلنامه علوم و فناوری فضایی, 2013
Providing of sufficient input pressure of pumps is Pressurizing system tank mission. In structure of objective propulsion system, pressurizing system of fuel tank is hot gas kind that is feeding with engine which caused of operation relational.
H. R. Ali Mohammady, D. Ramesh, M. R. Heidary, R Farrokhi, H. Karimi   +4 more
doaj  

Dynamic interaction between clustered liquid propellant rocket engines under their asynchronous start-ups

Propulsion and Power Research, 2021
A nonlinear mathematical model of the low-frequency dynamics of the clustered multi-engine rocket propulsion system has been developed and the computations of the engine transient processes during the start-ups of the four-engine propulsion system with a
Sergey I. Dolgopolov, Olexiy D. Nikolayev, Nataliia V. Khoriak   +2 more
doaj  

Advances and Trends in Terrain Classification Methods for Off‐Road Perception

Journal of Field Robotics, EarlyView.
ABSTRACT Off‐road autonomous vehicles (OAVs) are becoming increasingly popular for navigating challenging environments in agriculture, military, and exploration applications. These vehicles face unique challenges, such as unpredictable terrain, dynamic obstacles, and varying environmental conditions.
Tanzila Arafin, Anwar Hosen, Zoran Najdovski, Lei Wei, Mohammad Rokonuzzaman, Michael Johnstone   +5 more
wiley   +1 more source

Passively regulated water electrolysis rocket engine Patent [PDF]

, 1970
Water electrolysis rocket engine with self- regulating stoichiometric fuel mixing ...
Grant, D. J.
core   +1 more source