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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Solvation dynamics in water confined within layered manganese dioxide
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Exciton dynamics in cation-exchanged CdSe/PbSe nanorods: The role of defects
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The resistance perturbation distance: A metric for the analysis of dynamic networks
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Evaluation of modeled global vegetation carbon dynamics: Analysis based on global carbon flux and above-ground biomass data
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Time-resolved X-ray photoelectron spectroscopy techniques for the study of interfacial charge dynamics
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Learning the dynamical response of nonlinear non-autonomous dynamical systems with deep operator neural networks
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Theorem-Proving Analysis of Digital Control Logic Interacting with Continuous Dynamics.
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Simulation of surface dynamics during dissolution as a function of the surface orientation: Implications for non-constant dissolution rates
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Dynamic rupture propagation on fault planes with explicit representation of short branches
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Experimental evidence for wall-rock pulverization during dynamic rupture at ultra-high pressure conditions
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X Ray Photon Correlation Spectroscopy for the study of polymer dynamics
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Effect of the number and position of nozzle holes on in- and near-nozzle dynamic characteristics of diesel injection
Despite the fact that all modern diesel engines use multi-hole injectors, single-hole injectors are frequently used to understand the fundamental properties of high-pressure diesel injections due to their axisymmetric design of the injector nozzles. A multi-hole injector accommodates many holes around the nozzle axis to deliver adequate amount of fuel with small orifices. The off-axis arrangement of the multi-hole injectors significantly alters the inter- and near-nozzle flow patterns compared to those of the single-hole injectors. This study compares the transient needle motion and near-nozzle flow characteristics of the single- and multi-hole (3-hole and 6-hole) diesel injectors to understand how the difference in hole arrangement and number affects the initial flow development of the diesel injectors. A propagation-based X-ray phase-contrast imaging technique was applied to compare the transient needle motion and near-nozzle flow characteristics of the single- and multi-hole injectors. The comparisons were made by dividing the entire injection process by three sub-stages: opening-transient, quasi-steady and closing-transient. (C) 2015 Elsevier Ltd. All rights reserved.