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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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Muzzle velocity: how well can we measure it?
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Observations from High-Velocity Recovery Experiments of the Crystallization Behavior of Olivine from Iron-Enriched Melts
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Velocity map imaging apparatus for studying electron transfer and plasma initiation with low-energy electrons
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Laser-Based Characterization of Reflected Shock Tunnel Freestream Velocity and Multi-Species Thermal Nonequilibrium with Comparison to Modeling
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One-Dimensional Multi-Velocity Capabilities for Arbitrary Lagrangian-Eulerian Normal Contact Mechanics
Lagrangian and Arbitrary Lagrangian Eulerian (ALE) hydrodynamics codes such as FLAG form the backbone of many mission-critical multi physics simulations at Los Alamos National Laboratory. Critical to pre forming high fidelity simulations with these codes are Lagrangian and ALE contact algorithms, which allow materials to collide, slide, and sep arate throughout a simulation.
Powdermet CRADA for VELOCITI Voucher (CRADA Final Report)
NLR shall develop a model of an electric thermal energy storage (ETES) system in the System Advisor Model (SAM) framework that uses a salt and particle slurry developed by PowderMet as the thermal energy storage medium. The ETES shall consist of a recuperated sCO 2 Brayton cycle using 2-tank indirect thermal energy storage and an electric heater for heat input. The salt slurry uses chloride salt and operates at a maximum temperature of 500-720°C. The ETES uses dry air cooling. The salt slurry will be modeled as a sensible heat storage medium and as a latent heat storage medium. NLR will use the model to do parametric analysis of the factors affecting the performance (ex., round trip efficiency) of the ETES system. NLR will work with PowderMet to estimate the costs of system components and total system costs, with the levelized cost of electricity (LCOE) as the primary cost metric.
Acoustic Particle Velocity Measurements around a Tidal Current Turbine
Quantifying the underwater sound produced by tidal turbines is essential both to understand their potential environmental impacts and to understand how that sound might interfere with the intended application of the turbine (e.g., powering acoustic monitoring systems). In this project, we measured the sound radiated by a small-scale crossflow tidal turbine. The turbine was deployed from October 2023 to March 2024 in the tidal channel at the entrance to Sequim Bay, WA. Acoustic measurements were made with three different sensor packages: a commercial-off-the-shelf vector sensor (operated by PNNL), a vector sensor array (operated by Integral Consulting), and drifting hydrophones (operated by UW). Acoustic recordings from the three sensors highlight changes in the turbine acoustic signature over the course of a tidal cycle and throughout the 6-month turbine deployment. Our results also highlight the utility of acoustic vector sensors for localizing sound attributable to marine energy devices in acoustically complex environments.
Quantify the Emissions Reductions - VELOCITI Solar Dynamics Voucher (CRADA Final Report)
Contractor will quantify the net life cycle emission benefits resulting from manufacturing fertilizers via the diversion of biosolids from their current disposal practice relative to synthetic fertilizers.
Measurements of NO Rotational and Vibrational Temperatures, Partial Pressure, and Velocity in Hypersonic Shock Tunnel Flows
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Laser Absorption Spectroscopy Measurements of Internal Temperatures and Velocities in Hypersonic Shock Tunnels and 1D State-Resolved Simulations of Hypersonic Flows
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New Technique for Ultra-high Velocity Selectivity of Molecules in a Pure Quantum State
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Tunable, ultrahigh velocity resolution in molecular beams
Slides designed for a seven-minute poster preview selected for a "hot topics" session at the Dynamics of Molecular Collisions conference in July 2025.
Seismic velocity modeling and earthquake relocations for the southern Nevada National Security Site (NNSS), with a focus on Rock Valley
The Rock Valley Direct Comparison (RV/DC) is the third phase of the Source Physics Experiment (SPE; Snelson et al., 2014), a project aimed at improving seismic discrimination between explosive sources and natural earthquakes. Phases I and II of SPE focused on studying the generation of shear waves in endmember geologies (granite and alluvium, respectively), while Phase III aims to detonate a chemical explosion co-located with the source region of the 1993 Rock Valley earthquake sequence, located in the Rock Valley Fault Zone (RVFZ), in the southern portion of the Nevada Test Site (now the Nevada National Security Site, or NNSS).
Effects of Temperature and Stress on Zero Group Velocity Lamb Modes and their Role in Material Characterization
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A Target Qualification Station for dynamic compression experiments using the imaging velocity interferometer system for any reflector (VISAR) velocimetry at the NIF
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Novel methods for ultrahigh velocity resolution in molecular beams for inelastic scattering dynamics and chemical reactions
Forty minute invited presentation at the Cold Molecules and Cold Chemistry workshop.
The vertical-velocity skewness in the atmospheric boundary layer without buoyancy and Coriolis effects
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