Results 31 to 40 of about 1,976 (201)
Numerical Simulations of Flow and Fuel Regression Rate Coupling in Hybrid Rocket Motors [PDF]
INCAS Bulletin, 2017 The hybrid propulsion offers some remarkable advantages like high safety and high specific impulse and thus it is considered a promising technology for the next generation launchers and space systems. The purpose of this work is to validate a design tool
Marius STOIA-DJESKA +2 more
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Examining Metal Additives in a Marine Hybrid-Propellant, Water-Breathing Ramjet
Journal of Marine Science and Engineering, 2022 This research focuses on theoretically and experimentally evaluating the performance of a metallized hybrid-propellant, water-breathing ramjet. The aluminum and/or magnesium particles added to a polymeric (polyester) fuel grain are hydro-reactive, using ...
Nachum E. Eisen, Alon Gany
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Trajectory Estimation for a Hybrid Rocket [PDF]
AIAA Guidance, Navigation, and Control Conference, 2009 This paper presents a research work to develop a navigation technique for a class of nano-micro space rocket. Onboard MEMS inertial sensors are used in view of post-flight trajectory estimation. Combined with synchronized measurements of the combustion engine which is of hybrid type and uses N2O and PE, we show how the relative redundancy of the data ...
Pierre-Jean Bristeau, Nicolas Petit
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Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping
Advanced Science, EarlyView.This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron +4 more
wiley +1 more source
AerospaceHybrid rocket motors have great development potential due to their outstanding thrust adjustment flexibility and long-term operation ability. However, nozzle erosion during the motor operation can cause an increase in the throat area of the nozzle, which
Xiangyu Meng +5 more
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Advanced Science, EarlyView.The dynamic disulfide bonds facilitated the development of high‐performance aerospace ablation‐resistant materials. At moderate temperature, the dissociation and recombination of disulfide bonds ensured excellent processability, mechanical properties, and recycling ability of phenolic resin; at high temperature, cleavage of disulfide bonds produced ...
Yu Li +9 more
wiley +1 more source
Review of Classical Diffusion-Limited Regression Rate Models in Hybrid Rockets
Aerospace, 2019 In this article, we undertake a concise review of several milestone developments in classical regression rate models of hybrid rocket motors. After a brief description of the physical processes entailed in hybrid rocket combustion, Marxman’s ...
Timothy Marquardt, Joseph Majdalani
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Experimental investigation of erosion rate of insulation materials using hybrid rockets
FirePhysChem, 2021 Thermal insulation is essential to protect the exposed surface from high-temperature and high heat flux situations. The selection of suitable insulation materials plays a crucial role in determining rocket performance.
Phaninder Reddy Vaka +2 more
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Bio‐Inspired Gradient Coatings Enhance the Leading Edge Erosion Resistance of Wind Blades
Advanced Science, EarlyView.Rain‐induced erosion of the wind turbine blade leading edge poses a critical challenge to maintenance and operation. Here, we propose a bio‐inspired approach for erosion protection utilising a platelet‐reinforced polyurethane coating with a graded through‐thickness architecture.
Natalia Sofia Guevara‐Sotelo +2 more
wiley +1 more source
Effect of Varying Design Options on the Transient Behavior of a Hybrid Rocket Motor
Journal of Aerospace Technology and Management, 2014 Hybrid rockets provide compelling features for use in atmospheric and space rocket propulsion. One of the prominent applications of hybrid rockets which foster on its characteristics is the propulsion of micro air launch vehicles. In this paper, a set of
Raed Kafafy +2 more
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