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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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Repetitive autoignition and extinction instability of non-premixed n-dodecane spray cool flames
Not provided.
Measurement of Spray Chamber Ignition Delay and Cetane Numbers for Aviation Turbine Fuels
Experiments using pure compounds, National Jet Fuels Combustion Program (NJFCP) test fuels, and commercial jet fuels were conducted to demonstrate the equivalence of the indicated cetane number (ICN) and derived cetane number (DCN) for jet fuels. The calibrated range for ICN was also extended to lower cetane number (CN) values (5 to 35) to allow CN quantification for jet fuel synthetic blending components (SBCs) with low CN. ICN and DCN were shown to be highly correlated for values above about 30. This study presents the most comprehensive comparison of these two methods published to date. Because of the importance of low-volume test methods for early-stage SBC production process development, we demonstrated that ICN and DCN can be accurately measured with 15 mL of fuel, well below 40 to 100 mL required by standard methods. ICN or DCN is important for jet fuels because fuels with lower CN are more prone to lean blowout (LBO), an undesirable operational failure in a jet engine. Comparing data on a fuel-to-air ratio (Φ) at LBO for the NJFCP fuels shows similar linear correlations for ICN and DCN. Ignition delay measurements at lower-pressure and higher-temperature conditions may be more directly relevant to LBO. At 675 °C, 0.5 MPa, and a global Φ of roughly 0.68, ignition delay time correlations to LBO were similar to those produced from DCN and ICN. A much weaker correlation was obtained with a global Φ value of 0.34.
Interfacial Enrichment of Lauric Acid Assisted by Long-Chain Fatty Acids, Acidity and Salinity at Sea Spray Aerosol Surfaces
Not Available
Scalable Spray-On Fabrication Approach for Voltage-Tunable Thermal Emissivity Surfaces
Not Available
Identification and Confirmation of Fentanyls on Paper using Portable Surface Enhanced Raman Spectroscopy and Paper Spray Ionization Mass Spectrometry
Not provided.
Optimization of spray-coated nanochitin/nanocellulose films as renewable oxygen barrier layers via thermal treatment
A simple method of enhancing the oxygen barrier property of a renewable polysaccharide-based multilayer film by increasing the processing temperatures.
Microstructural dependence of spallation in kinetic and plasma sprayed refractory metal deposits
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Simulation of spray, wall-film, and charge preparation for light-duty cold-start applications
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The Impact of Ink and Spray Variables on Catalyst Layer Properties, Electrolyzer Performance, and Electrolyzer Durability
Not Available
High-speed low-coherence interferometry for film thickness measurements in impinging gasoline direct injection sprays.
Abstract not provided.
Influence of pilot-fuel mixing on the spatio-temporal progression of two-stage autoignition of diesel-sprays in low-reactivity ambient fuel-air mixture.
Abstract not provided.
In situ laser heating of Cold Spray Deposited Niobium and Tantalum Materials
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Effects of Injection Timing and Duration on Fuel-Spray Collapse and Wall-Wetting in a Stratified Charge SI Engine.
Abstract not provided.