Results 71 to 80 of about 17,329 (212)

Performance Comparison Between Two Different Injector Configurations in a Hybrid Rocket [PDF]

, 2007
Mass flux and pressure are usually considered the main parameters affecting the fuel regression rate in hybrid rockets, whereas the influence of the oxidiser injector is often neglected. Nevertheless, in some specific configurations, even in conventional
CARMICINO, CARMINE, RUSSO, ANNAMARIA
core   +1 more source

Analysis of carbon nano particle variant as the propellant fuel to increase specific impulses of rockets. [PDF]

F1000Res, 2023
Navalino R, Muda N, Hafizah M, Ruyat Y.
europepmc   +1 more source

Final design report of a personnel launch system and a family of heavy lift launch vehicles [PDF]

The objective was to design both a Personnel Launch System (PLS) and a family of Heavy Lift Launch Vehicles (FHLLVs) that provide low cost and efficient operation in missions not suited for the Shuttle.
Burton, Lee, Drake, Kerry, Kubinski, Russell, Mann, Darrin, Merritt, Debbie, Riha, David, Tupa, James, Turner, Ken   +7 more
core   +1 more source

Testing approaches for global optimization of space trajectories [PDF]

, 2008
In this paper, the procedures to test global search algorithms applied to space trajectory design problems are discussed. Furthermore, a number of performance indexes that can be used to evaluate the effectiveness of the tested algorithms are presented ...
Locatelli, Marco, Minisci, Edmondo, Vasile, Massimiliano   +2 more
core   +1 more source

Automated multigravity assist trajectory planning with a modified ant colony algorithm [PDF]

, 2010
The paper presents an approach to transcribe a multigravity assist trajectory design problem into an integrated planning and scheduling problem. A modified Ant Colony Optimization (ACO) algorithm is then used to generate optimal plans corresponding to ...
Battin R. H., Ceriotti M., Ceriotti M., Goldberg D. E., Jehn R., Kaplan M. H., Massimiliano Vasile, Matteo Ceriotti, Press W. H., Stryk O. V., Yárnoz D. G.   +10 more
core   +1 more source

Preparation and mechanical properties of the 2.5D carbon glass hybrid woven composite materials

Science and Engineering of Composite Materials
The 2.5D carbon glass hybrid woven composite (CGHWC) is currently being utilized as a protective material for the external cables of solid rockets due to its extensive advantages in terms of structural load-bearing and integrated thermal insulation. This
Zhang Lijun, Che Zhe, Zhu Yu, Hou Peiyu, Liu Zilong, Wang Yidong, Wang Junpeng, Zhang Tao, Hong Yiqiang   +8 more
doaj   +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

Hybrid rocket performance [PDF]

A hybrid rocket is a system consisting of a solid fuel grain and a gaseous or liquid oxidizer. Figure 1 shows three popular hybrid propulsion cycles that are under current consideration.
Frederick, Robert A., Jr.
core   +1 more source

Low-temperature tribological properties of Si3N4 ceramic composites incorporating nano/microscale graphene and Si3N4 whisker

Journal of Materials Research and Technology
Si3N4 ceramic bearings have demonstrated significant potential in augmenting the performance of liquid rockets. However, the operational conditions, including reciprocating use, ultra-high-speeds, and high-load impacts, impose more stringent requirements
Fei Chen, Xiaobo Sun, Bin Fang, Ke Yan, Bei Yan   +4 more
doaj   +1 more source

Design of cascaded FOPI-FOPD-BLQG controller tuned with hybrid grasshopper and firefly algorithms for stabilizing cart-inverted pendulum system

Mechanics & Industry
The Cart Inverted Pendulum (CIP) system is a widely studied problem in control theory due to its inherent instability and nonlinearity dynamics, which closely mimic various real-time applications, including segways, robotics, rockets, and missile guiding
Verma Neelam, Valluru Sudarshan K.
doaj   +1 more source