Results 61 to 70 of about 1,322,842 (239)

Low-Frequency Feed-System-Coupled Combustion Instability in Hybrid Rocket Motors

Journal of Thermal Science and Technology, 2013
The low-frequency unstable combustion of hybrid rocket motors was investigated using the transfer function of the full thermal-combustion-gasdynamic coupled system that was coupled with a liquid oxidizer feed system.
Takakazu MORITA, Saburo YUASA, Koki KITAGAWA, Toru SHIMADA, Shigeru YAMAGUCHI   +4 more
doaj   +1 more source

The HyEnD stern hybrid sounding rocket project [PDF]

Progress in Propulsion Physics – Volume 11, 2019
The student team Hybrid Engine Development (HyEnD) of the University of Stuttgart is taking part with the Institute of Space Systems (IRS) in the DLR educational program STERN (Studentische Experimentalraketen). This program supports students at German universities to design, build, and launch an experimental rocket within a 3-year project time frame ...
Kobald, Mario, Schmierer, Christian, Fischer, Ulrich, Tomilin, Konstantin, Petrarolo, Anna, Rehberger, Markus   +5 more
openaire   +1 more source

Programmable solar‐blind ultraviolet sensors enabling integrated single‐pixel sensing and neuromorphic processing

InfoMat, EarlyView.
A Schottky photodiode based on (Al0.14Ga0.86)2O3 was developed, in which the sensing and processing functions were temporally decoupled through bias voltage modulation. By integrating single‐pixel imaging with a reservoir computing architecture, a comprehensive intelligent vision system was constructed.
Hongbin Wang, Zhuangzhuang Li, Zhongshi Ju, Cheng Zhou, Peng Li, Lizhi Ding, Jiangang Ma, Zhongqiang Wang, Ya Lin, Haiyang Xu, Yichun Liu   +10 more
wiley   +1 more source

Neural Network-Based Optimization of Hybrid Rocket Design for Modular Multistage Launch Vehicle

Aerospace
In this paper, an integrated optimization is carried out to find the optimal hybrid rocket engine design for a modular multistage launch vehicle targeting a 500 km polar circular orbit. A single hybrid rocket engine unit is reused across the whole launch
Paolo Maria Zolla, Alessandro Zavoli, Mario Tindaro Migliorino, Daniele Bianchi   +3 more
doaj   +1 more source

Concordance Between MR Safety Guidance Documents on Conditions for a Safe MR Environment

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Environmental conditions established at facility design, construction, updates, and/or procurement of specialized equipment are the foundation of safe MR practice. Establishing an institutional MR safety program must take into consideration the conditions of the MR environment, and staff training should be tailored to its features ...
Ives R. Levesque, Véronique Fortier, Jorge Campos Pazmiño, Evan McNabb   +3 more
wiley   +1 more source

Combustion of Date Stone and Jojoba Solid Waste in a Hybrid Rocket-like Combustion Chamber

Aerospace
The performance of two solid biomass wastes, date stone and jojoba solid waste, was experimentally examined for their potential application in combustion and propulsion systems.
Saleh B. Alsaidi, Jeongmoo Huh, Mohamed Y. E. Selim   +2 more
doaj   +1 more source

Dynamic Performance Enhancement of a High‐Agility Hypersonic Mechanical System via a Learning‐Augmented Robust Control Architecture

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The design of control systems for high‐agility mechanical systems operating in extreme environments is a significant challenge in nonlinear dynamics. This paper addresses the complex dynamic control problem of a hypersonic interceptor, modeled as a multi‐input multi‐output (MIMO) mechanical system characterized by strong aerodynamic cross ...
Mohammad Mahdi Soori, Seyed Hossein Sadati   +1 more
wiley   +1 more source

Dynamic Testing of a Hybrid-Propellant Water-Breathing Ram Rocket in Underwater Cruise Conditions

Journal of Marine Science and Engineering
High-speed submerged marine vehicles, such as torpedoes, traveling at velocities of an order of 100 m/s and above, require powerful propulsion to overcome the tremendous hydrodynamic drag.
Sagi Dinisman, Nachum E. Eisen, Alon Gany   +2 more
doaj   +1 more source

Screening Surface Modifications to Benzene to Improve Solubility in Hydroxyl‐Terminated Polybutadiene (HTPB)—A DFT Demonstration

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT The objective of this paper is to demonstrate the advantage of computationally pre‐screening surface‐modifying material candidates, using density functional theory (DFT), to inform experimental synthesis and formulation efforts. This demonstration focuses on improving the solubility of benzene‐based materials in hydroxyl‐terminated ...
Samantha E. Knoth
wiley   +1 more source

A systematic review on computational modelling and reacting flow simulations of a hybrid rocket engine

Advances in Aerodynamics
Reacting flow simulations represent a formidable challenge in numerical analysis because they incorporate complex mechanisms from various reacting flows alongside high-velocity fluid dynamics.
Arvind Pallela, Amit Kumar Thakur, Lovi Raj Gupta, Rahul Kumar, Rajesh Singh   +4 more
doaj   +1 more source