Award Abstract # 0645063
PECASE: Exploring Jet Fragmentation and Atomization for Combustion and Fire Suppression Systems

NSF Org: CBET
Division of Chemical, Bioengineering, Environmental, and Transport Systems
Recipient: UNIVERSITY OF MARYLAND, COLLEGE PARK
Initial Amendment Date: March 1, 2007
Latest Amendment Date: March 1, 2007
Award Number: 0645063
Award Instrument: Standard Grant
Program Manager: Ruey-Hung Chen
CBET
 Division of Chemical, Bioengineering, Environmental, and Transport Systems
ENG
 Directorate for Engineering
Start Date: July 1, 2007
End Date: June 30, 2013 (Estimated)
Total Intended Award Amount: $400,000.00
Total Awarded Amount to Date: $400,000.00
Funds Obligated to Date: FY 2007 = $400,000.00
History of Investigator:
  • Andre Marshall (Principal Investigator)
    awmarsh@umd.edu
Recipient Sponsored Research Office: University of Maryland, College Park
3112 LEE BUILDING
COLLEGE PARK
MD  US  20742-5100
(301)405-6269
Sponsor Congressional District: 04
Primary Place of Performance: University of Maryland, College Park
3112 LEE BUILDING
COLLEGE PARK
MD  US  20742-5100
Primary Place of Performance
Congressional District:
04
Unique Entity Identifier (UEI): NPU8ULVAAS23
Parent UEI: NPU8ULVAAS23
NSF Program(s): CFS-Combustion & Fire Systems
Primary Program Source: 0100999999 NSF RESEARCH & RELATED ACTIVIT
Program Reference Code(s): 0000, 061E, 1045, 1187, OTHR
Program Element Code(s): 140700
Award Agency Code: 4900
Fund Agency Code: 4900
Assistance Listing Number(s): 47.041

ABSTRACT

Proposal Number: CBET-0645063
Principal Investigator: Marshall, Andre W.
Affiliation: University of Maryland, College Park
Proposal Title: CAREER: Exploring Jet Fragmentation and Atomization for Combustion and Fire Suppression Systems


Atomization research has received attention for over a century owing to many fascinating occurrences of liquid fragmentation phenomena in nature and to countless industrial applications requiring sprays for liquid dispersion, including fuel injectors and fire-suppressant delivery. The liquid-jet atomization process takes place in two major steps. Primary atomization occurs when oscillations in the jet are amplified under favorable conditions, causing the body of the jet to break up into drops. Secondary atomization occurs if the initial drops exceed a critical size, and it results in continued disintegration of drops until a sufficiently small size is reached. The break-up behavior, associated aerodynamics, and location of the initial drops is critical in determining the dispersion and disintegration characteristics of the resulting spray; however, limited quantitative droplet formation data is available because of diagnostic difficulties with interrogating the dense spray in this region.

This research focuses on the science of atomization and sprays at the stage of primary atomization where a liquid jet first breaks into drops. The breakup will be studied by multiple laser diagnostic techniques and by modeling, which in turn will be compared to data from commercial liquid injectors. This is a challenging and widely important problem, accompanied by a measure of risk but going directly to the key issue of determining droplet size distribution and its source. Furthermore, the research will aid successful development of scientific and design models by providing both fundamental insights and a comprehensive database for testing.

Broad Impacts: A key aspect of the CAREER grant is to create substantial societal impact through its education plan. The awardee's proposed middle-school "Saturday Science Laboratory" has the potential to capture the interest of students at a key moment when they are open to the possibility and reality of using science. The University of Maryland College Park is well situated to reach a large and diverse population of students and their instructors as well. By particular outreach to underrepresented minorities, the award recipient intends to increase their potential for becoming scientists and engineers.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

Note:  When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

Marshall, Andre "Unraveling Fire Suppression Sprays" Fire Safety Science â?? Proceedings of the Tenth International Symposium , 2011
Marshall, A. W. "Unraveling Fire Suppression Sprays" Proceedings of the Tenth International Symposium on Fire Safety Science , 2011
Ren, N; Baum, HR; Marshall, AW "A comprehensive methodology for characterizing sprinkler sprays" PROCEEDINGS OF THE COMBUSTION INSTITUTE , v.33 , 2011 , p.2547 View record at Web of Science 10.1016/j.proci.2010.06.10
Ren, N.Baum, H. R.Marshall, A. W., "A Comprehensive Methodology for Characterizing Sprinkler Sprays" Proceedings of the Combustion Institute , v.33 , 2011 , p.2547
Ren, N., Blum, A., Do, C., and Marshall, A. W. "Atomization and Dispersion Measurements in Fire Sprinkler Sprays" Atomization and Sprays , 2009
Ren, N.Blum, A.Do, C.Marshall, A. W., "Atomization and Dispersion Measurements in Fire Sprinkler Sprays" Atomization and Sprays , 2009
Ren, N., Blum, A. F., Zheng, Y. H., Do, C., and Marshall, A. W. "Quantifying the Initial Spray from Fire Sprinklers" Ninth International Symposium on Fire Safety Science , 2008
Ren, N. Blum, A. F.Zheng, Y. H.Do, C.Marshall, A. W. "Quantifying the Initial Spray from Fire Sprinklers" Proceedings of the Ninth International Symposium on Fire Safety Science , 2008
Yinghui Zheng and Andre Marshall "Characterization of the Initial Spray from a Jet in Crossflow" Atomization and Sprays , v.7 , 2011 , p.575 10.1615/AtomizSpr.2011003714
Zheng, Y. H., Marshall, A. W. "Characterization of the Initial Spray from a Jet in Crossflow" Atomization and Spray , v.7 , 2011

Please report errors in award information by writing to: awardsearch@nsf.gov.

Print this page

Back to Top of page