Results 71 to 80 of about 1,531,293 (230)
, 2008 Control over drop size distributions, injection rates, and geometrical distribution of fuel and oxidizer sprays in bi-propellant rocket engines has the potential to produce more efficient, more stable, less polluting rocket engines.
Gabriel, Stephen +4 more
core +2 more sources
Quality and Reliability Engineering International, EarlyView.ABSTRACT The growing availability of temporal data in agriculture has created new opportunities for data‐driven decision support systems aimed at improving the efficiency, sustainability, and adaptability of agricultural systems. Remote sensing platforms, weather‐related datasets, and field‐management records provide information on crop development and
Amalia Vanacore +4 more
wiley +1 more source
One-Dimensional simulation of internal ballistic of a Hybrid Rocket Engine [PDF]
علوم، فناوری و کاربردهای فضاییA one-dimensional code was developed to simulate the performance of hybrid rocket engines. In this code, the conservation equations of mass, momentum and energy are solved in one-dimensional and inviscid form.
Hadi Rezaei
doaj +1 more source
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
National Policy Coherence Counts for Reducing Inequality in Global Climate and Development Agendas
Sustainable Development, EarlyView.ABSTRACT International institutions promote policy coherence as crucial to the effective and fair implementation of global sustainability agendas, though the evidence for its benefits is slim. We present here the first systematic cross‐country dataset on the consequences of national government efforts to promote policy coherence for vulnerable groups ...
Katherine Browne +10 more
wiley +1 more source
Small, EarlyView.A one‐step oblique angle reactive sputtering approach enables simultaneous tuning of bulk and interfacial stoichiometry in a metal oxide/ silicon heterojunction. In case of vanadium oxides, growth angle variation controls the formation of stoichiometric SiO2, ternary SiOx(V) interlayer, and phase purity of vanadium oxide, considerably simplifying the ...
Aparajita Mandal +3 more
wiley +1 more source
Oxygen–Methane Torch Ignition System for Aerospace Applications
Aerospace, 2020 A new ignition system, based on a CH4/O2 torch has been developed by the Chemical Propulsion Laboratory of the University of Brasilia. Designed to ignite a hybrid rocket, this device has been improved to be used in testing of solid and liquid ramjet ...
Olexiy Shynkarenko, Domenico Simone
doaj +1 more source
3D printed fuel for small hybrid rocket engines [PDF]
, 2021 Tato práce se zabývá využitelností 3D tisku pro výrobu palivových zrn pro hybridní raketové motory. V rámci práce byla provedena validace navržených řešení pro tisk palivových zrn a stanovena doporučení pro budoucí testování.This thesis deals with ...
Viktor Hais
core
steel research international, EarlyView.The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley +1 more source
Characterization of Swirl-Driven Hybrid Rocket Engines [PDF]
, 2020 Although hybrid rockets offer several potential benefits in terms of safety and performance, their use has mostly been limited to lab-scale motors and academic settings.
Marquardt, Timothy
core