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You searched on: Author: jiann yang

Displaying records 21 to 30 of 136 records.
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21. Vertical Release of Hydrogen in a Partially Enclosed Compartment : Role of Wind and Buoyancy
Published: 1/25/2011
Authors: Kuldeep R Prasad, William M Pitts, Jiann C Yang
Abstract: The natural and wind driven mixing and dispersion of hydrogen released in an accidental manner in a partially enclosed compartment with two vents is investigated using theoretical tools. A simple analytical model is constructed to predict the entra ...

22. Effect of wind and buoyancy on hydrogen release and dispersion in a compartment with vents at multiple levels
Published: 11/30/2010
Authors: Kuldeep R Prasad, William M Pitts, Jiann C Yang
Abstract: The natural and forced mixing and dispersion of hydrogen released in an accidental manner in a partially enclosed compartment with vents at multiple heights is investigated using theoretical tools. The key to the analysis is determination of the po ...

23. Fire Suppression
Published: 11/16/2010
Authors: Cary Presser, Jiann C Yang
Abstract: Water sprinkler sprays (with relatively large droplet sizes) in residential and commercials structures are probably the most well known application of sprays in fire suppression. In more recent years, water mists (characterized by reduced droplet si ...

24. Prediction of Light Scattering and Ionization Chamber Sensor Response to Smolder Smoke Aerosols
Published: 9/8/2009
Authors: Thomas George Cleary, Jiann C Yang
Abstract: Diagnostic equipment developed for an International Space Station experiment, the Smoke Aerosol Measurement Experiment (SAME), utilized three measurement devices to determine size properties of the smoke aerosols generated. They consisted of a light ...

25. A Thermodynamic Analysis of Refilling of a Hydrogen Tank
Published: 8/31/2009
Author: Jiann C Yang
Abstract: A thermodynamic analysis of refilling of a gaseous hydrogen fuel tank is described. This study may lend itself to the applications of refilling a hydrogen storage tank onboard a hydrogen fuel cell vehicle. The gaseous hydrogen is treated as an idea ...

26. Comparison of Methane and Propane Diffusion Flame Extinguishment by Thermal Agents An Experimental and Detailed Kinetic Modeling Study
Published: 5/17/2009
Authors: William M Pitts, Jiann C Yang, Rodney A Bryant, Linda G Blevins
Abstract: A combined computational and experimental study of methane and propane flames burning in air diluted with thermal agents is described. Detailed kinetic modeling of opposed-jet diffusion flames and experimental extinguishing volume fraction measureme ...

Published: 8/1/2008
Author: Jiann C Yang
Abstract: In this short communication, an analytical framework is provided to estimate the effect of temperature on equilibrium storage pressure in a would-be situation wherein a material-based hydrogen storage system is rendered closed.  Under several li ...

28. On the Development and Characterization of a Firebrand Generator
Published: 5/1/2008
Authors: Samuel L Manzello, John R Shields, Thomas George Cleary, Alexander Maranghides, William E. Mell, Jiann C Yang, Yoshihiko Hayashi, Daisaku Nii, Tsuyoshi Kurita
Abstract: A unique experimental apparatus has been constructed in order to generate a controlled and repeatable size and mass distribution of glowing firebrands. The present study reports on a series of experiments conducted in order to characterize the perfor ...

29. Experimental Investigation of Firebrands: Generation and Ignition of Fuel Beds
Published: 4/1/2008
Authors: Samuel L Manzello, Thomas George Cleary, John R Shields, Alexander Maranghides, William E. Mell, Jiann C Yang
Abstract: A series of real scale fire experiments were performed to determine the size and mass distribution of firebrands generated from Douglas Fir (Pseudotsuga menziesii) trees. The results of the real scale fire experiments were used to determine firebrand ...

30. Analysis of Thermodynamic Processes Involving Hydrogen
Published: 3/5/2008
Authors: Jiann C Yang, Marcia L Huber
Abstract: The effect of thermal exposures on several thermodynamic processes involving the storage and use of hydrogen has been examined using the NIST REFPROP database. The thermal environment could be the result of a fire or other thermal events. The therm ...

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