SEARCH · Engineering Papers
Results for “SCALE”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Critical heat dissipation length scales in fully dense thermite foils
Not Available
Efficient sampling algorithm for large-scale optimization under uncertainty problems
Not Available
Developing high performance PA 11/cellulose nanocomposites for industrial-scale melt processing
Not provided.
Freeze thaw and deicer salt scaling resistance of concrete prepared with alkali aluminosilicate cement
Not Available
Large-scale fire suppression modeling of corrugated cardboard boxes on wood pallets in rack-storage configurations
In this study, the fire growth and suppression models in FireFOAM were validated for rack-storage commodities consisting of two solid fuels, namely corrugated cardboard boxes and hardwood pallets, which are referred to as Class 2 commodity. Validation experiments included two fire-growth and two fire-suppression configurations with different rack-storage array heights (3 and 5 tiers). In the suppression study, standard-response upright ceiling sprinklers (K-factor of 160 lpm/bar1/2) were used. The time-resolved chemical heat release rates obtained from the experiments were used to validate the fire growth model. The observed sprinkler activations and fire-spread patterns were used to validate the suppression model. This study identified that lateral flame spread is primarily enabled by flames impinging on the commodity's bottom surfaces. This study also showed that obstructions, such as wood pallets, can significantly impede convective and radiative heat transfer to the underside of the commodity, reducing the lateral flame spread rate. Fire-suppression modeling revealed that both surface water transport and lateral flame spread rates are important when predicting fire-suppression behavior. Therefore, as the rack-storage array height increases, so does the water transport time, which results in the fire becoming more difficult to control. Likewise, as the lateral spread rate increases, e.g., as occurs in the absence of wood pallets, fire-suppression also becomes more difficult.
Pilot-scale catalytic fast pyrolysis of loblolly pine over γ-Al2O3 catalyst
Not Available
Millennial-scale carbon accumulation and molecular transformation in a permafrost core from Interior Alaska
Not provided.
Pore-scale observations of supercritical CO[subscript 2] drainage in Bentheimer sandstone by synchrotron x-ray imaging
Abstract not provided