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Search Publications by: Jiann C. Yang (Fed)

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Displaying 51 - 75 of 163

Fire Suppression

November 16, 2010
Author(s)
Cary Presser, Jiann C. Yang
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 sizes

Smoke Aerosol Measuremen Experiment (SAME)

March 5, 2010
Author(s)
Jiann Yang, Thomas Cleary, D L. Urban, Gary A. Ruff, William Sheredy, Zeng-guang Yuan, G W. Mulholland
This is the final report of a research project entitled Smoke Aerosol Measurements Experiment (SAME). Smoke and/or fire detection in the spacecraft is crucial to the success of future long term space travel. It has been realized that the gravity force

A Thermodynamic Analysis of Refilling of a Hydrogen Tank

August 31, 2009
Author(s)
Jiann C. Yang
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 ideal or a

Properties of Smoke from Overheated Materials in Low-Gravity

January 20, 2009
Author(s)
David L. Urban, Gary A. Ruff, Thomas Cleary, Jiann Yang, George Mulholland, Zeng-guang Yuan
Smoke particle size measurements were obtained under low-gravity conditions by overheating several materials typical of those found in spacecraft. The measurements included integral measurements of the smoke particles and physical sample of the particles

ON MATERIAL-BASED HYDROGEN STORAGE

August 1, 2008
Author(s)
Jiann C. Yang
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 limited ideal

On the Development and Characterization of a Firebrand Generator

May 1, 2008
Author(s)
Samuel L. Manzello, John R. Shields, Thomas G. Cleary, Alexander Maranghides, William E. Mell, Jiann C. Yang, Yoshihiko Hayashi, Daisaku Nii, Tsuyoshi Kurita
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 performance

Experimental Investigation of Firebrands: Generation and Ignition of Fuel Beds

April 1, 2008
Author(s)
Samuel L. Manzello, Thomas G. Cleary, John R. Shields, Alexander Maranghides, William E. Mell, Jiann C. Yang
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 sizes

Analysis of Thermodynamic Processes Involving Hydrogen

March 5, 2008
Author(s)
Jiann C. Yang, Marcia L. Huber
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 thermodynamic

Verification of a Gas Mask Calibrant

February 19, 2007
Author(s)
Robert A. Fletcher, Jiann C. Yang, George W. Mulholland, R L. King, Michael R. Winchester, D Klinedinst, Jennifer R. Verkouteren, Thomas G. Cleary, David Buckingham, James J. Filliben

On the Ignition of Fuel Beds by Firebrands.

December 1, 2006
Author(s)
Samuel L. Manzello, Thomas G. Cleary, John R. Shields, Jiann C. Yang
An experimental apparatus has been built to investigate the ignition of fuel beds as a result of impact with burning firebrands. The apparatus allowed for the ignition and deposition of both single and multiple firebrands onto the target fuel bed. The

Firebrand Production From Burning Vegetation

November 30, 2006
Author(s)
Samuel L. Manzello, Alexander Maranghides, William E. Mell, Thomas G. Cleary, Jiann C. Yang
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 sizes

Screening Candidates for 30 nm Spheres

August 1, 2006
Author(s)
Michelle K. Donnelly, Jiann C. Yang
This paper describes the preliminary screening process that was conducted to identify potential candidate particles to be used as the NIST Standard Reference Material (SRM) 30 nm spheres. Five different samples were obtained and measured using the NIST

Fluid Dispensing and Dispersion

May 16, 2006
Author(s)
Jiann C. Yang, David R. Keyser
This paper is a condensed version of a chapter in the forthcoming Next Generation Program (NGP) final report edited by the authors. It summarizes the research conducted during the NGP program on fluid dispensing and dispersion within aircraft engine

Report of Experimental Results for the International Fire Model Benchmarking and Validation Exercise #3.

December 1, 2005
Author(s)
Anthony P. Hamins, Alexander Maranghides, Erik L. Johnsson, Michelle K. Donnelly, Jiann C. Yang, George W. Mulholland, Robert Anleitner
The Nuclear Regulatory Commission (NRC) and the National Institute of Standards and Technology (NIST) are participating in an International Collaborative Fire Model Project (ICFMP) to assess and validate fire computer codes for nuclear power plant

Ignition of Vegetation and Mulch by Firebrands in Wildland/Urban Interface (WUI) Fires.

November 13, 2005
Author(s)
Samuel L. Manzello, Thomas G. Cleary, John R. Shields, Jiann C. Yang
Firebrands or embers are produced as trees and structures burn in wildland/urban interface (WUI) fires. Hot firebrands ultimately come to rest and may ignite fuels far removed from the fire, resulting in fire spread. It is believed that firebrand showers
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