Fire Safety Science News #33 – August, 2012

The August, 2012 edition of Fire Safety Science News, the newly-renamed official newsletter of the IAFSS newsletter is now available online. The latest issues includes three featured articles on the toxicity and effectiveness of fire retardants, news from the membership, upcoming events and much more.

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UMD FPE Team Submits Entry to Flame Challenge

A group of FPE students, research staff and faculty members has teamed up during the last two weeks of March to prepare a video response to the question “What is a flame?” The question was asked by Alan Alda, actor, director, writer and science popularizer, in the form of an open science-outreach competition organized by Stony Brook University’s Center for Communicating Science. This apparently simple question is seen as an example of the type of challenges faced by engineers and scientists who typically struggle to communicate to the general public the relevance, interest and excitement of their work. To make things even worse (as well as more interesting), the “Flame Challenge” question was to be answered in a way that an 11-year-old would find intelligible and maybe even fun.

Because of mid-term exams and Spring Break, the FPE team was composed mostly of graduate students. The team included Paul Marcus Anderson (PhD student), Luis Bravo (PhD student), Haiwen Ding (former FPE graduate, currently a staff member of the UM Maryland Technology Enterprise Institute), Haiqing Guo (PhD student), Vivien Lecoustre (Research Associate), Isaac Leventon (PhD student) and Rosalie Wills (BS student). The team was advised by Professors Stas Stoliarov, Peter Sunderland and Arnaud Trouvé.

Entries to the “Flame Challenge” were accepted in different formats, including writing, video or graphics; the FPE team decided to submit a video. In a matter of a few days, the FPE team wrote a script, performed several experiments, made video recordings, enlisted two 10-year-old children (Jamel Johnson and Anthony Romero) from a local school (Mount Rainier Elementary School) to recite the text, and produced a movie that was then submitted by the April 2 deadline.

Entries have been submitted from all over the world and number up to several hundred (perhaps more than 1,000). Entries will be judged in part by panels of 11-year-olds (the Center for Communicating Science is working towards a goal of more than 10,000 young judges). Go Terps!

To learn more on the “Flame Challenge”, visit the “Flame Challenge” web site, the Center for Communicating Science web site or listen to the NPR interview of Alan Alda by Ira Flatow during the Science Friday show recorded on March 23, 2012.

For more information on the FPE entry to the “Flame Challenge” competition, please contact:
Prof. Arnaud Trouvé
Email: atrouve@umd.edu
Phone: 301-405-8209

A ‘Sound’ Experiment – DARPA Extinguishes Flames with Sound

Defense Advanced Research Projects Agency (DARPA) is showing off a new system that can put out flames using only sound [1]. It’s part of the U.S. defense agency’s Instant Fire Suppression program. Using two speakers arranged on either side of a pool fire, an acoustic field was emitted and engulfed the flame. The sound increases air velocity, which thins the boundary layer of the flame, making it weak and much easier to douse. “We have shown that the physics of combustion still has surprises in store for us” commented DARPA manager Matthew Goodman in a statement. “Perhaps these results will spur new ideas and applications in combustion research”. Lest you think this is really surprising, here are a couple of earlier mentions of the concept.

First, a Google search leads quickly to the Wikipedia entry for Charles Kellog [2] which cites the following from a 1926 newspaper article: “In The Sydney Morning Herald, Thursday, February 4, année 1926: Sound vibration – Extinguishes Fire: New-York, Feb. 2. 1926: Mr Charles Kellogg, a Californian scientist, give firemen here a demonstration of extinguishing a gas flame two feet high by tonal vibration. Mr Kellogg passed a bow, like an enlarged violin bow, swiftly across an aluminium tuning fork, producing a screech like an intense radio static. Instantly the yellow flame subsided to six inches and became a sputtering blue flare. Another movement of the bow completely extinguished the flame. Mr Kellogg claimed that in future buildings would have a scientifically-determined pitch, with a screech for extinguishing fires tuned in from a central firehouse, where it would be produced by a much larger bow. He said that the General Electric Company was experimenting with the matter”.

Second, from a book The Theory of Sound published in 1896 by Lord Rayleigh, 1904 Nobel Prize winner for Physics [3]: “Singing flames may sometimes replace electrically maintained tuning-forks for the production of pure tones, when absolute constancy of pitch is not insisted upon. In order to avoid progressive deterioration of the air, it is advisable to use a resonator open above as well as below. A bulbous chimney, such as are often used with paraffin lamps, meets this requirement, and at the same time emits a pure tone. Or an otherwise cylindrical pipe may be blocked in the middle by a loosely fitting plug (Phil. Mag. vol. vii. p. 149, 1879).

Vibrations capable of being maintained are not always self-starting. The initial impulse may be given by a blow administered to the resonator, or by a gentle blast directed across the mouth. In the striking experiments of Schaff’gotsch and Tyndall (Sound, 3rd edition, p. 224, 1875) a flame, previously silent, responds to a sound in unison with its own. In some cases the vibrations thus initiated rise to such intensity as to extinguish the flame.”

 

by Jack Watts. Fire Safety Institute, USA, and Associate Editor of Fire Safety Science News REFERENCES 1. Video: Darpa’s ‘Wall-of-Sound’ Fire Extinguisher, Wired, July 13, 2012. http://www.wired.com/dangerroom/2012/07/wall-of-sound-fire 2. Wikipedia contributors, ‘Charles Kellogg (naturalist)’, Wikipedia, The Free Encyclopedia, 26 June 2012, 20:24 UTC, http://en.wikipedia.org/w/index.php?title=Charles_Kellogg_(naturalist)[accessed 30 August 2012] 3. Rayleigh, John William Strutt, The Theory of Sound vol.II , 2nd ed., Macmillan, London, 1896, p. 228. —

FREE Student Membership

The Committee of the IAFSS are inviting all Fire Science and Engineering Students enrolled in bonafide courses or with registered PhDs to apply for Free membership of the Association. Membership will be valid until their studies have been completed. Go to Membership Page for details.

Obituary: Nora Helen Jason

After receiving her master’s degree, she accepted a position as cataloger, Sacramento State College, California. Areas of responsibility were: music, American history, psychology.
In 1967 she was selected as an Administrative Librarian with the Special Services Libraries, Germany. Two medium sized libraries in the Stuttgart area serving the service men and women and dependents provided managerial challenges with the American and German staff, library collection building, public relations, programs for the “troops,” including non-reading adults.
In 1969 Ms. Jason was promoted to Head Librarian, Special Services Libraries at McGraw Kaserne (Munich), Hospital Library and Dachau Library. With an Assistant Librarian and Larger staff it was possible to offer many more of the same activities except for a more diverse user population which also included University of Maryland students and retirees.
In 1971 Ms. Jason joined the Office of Fire Research and Safety staff to build a fire safety database for the National Aeronautics and Space Administration, Aerospace Safety Research and Data Institute (ASRDI). In a short time she was made the ASRDI Project Leader and successfully built the database which is now part of NASA RECON (their bibliographic database). The NASA work stimulated the beginning of the Fire Research Information Services and the building of the fire research collection. The collection has grown from zero to over 60,000 items during this time period. Access to the collection has been automated and national and international users can access the database, FIREDOC, from their home or office via modem, Web or Internet. FIREDOC contains the bibliographic reference, keywords, identifiers and (where possible) abstracts to the items in the collection.
In her capacity as Supervisor of the Fire Research Information Services, Ms. Jason has established national and international document exchange programs with her counterparts. As one of the driving forces of inFIRE (international network of Fire Information and Reference Exchange) she has been instrumental in developing products, e.g., a Union List of Serials, for use by the fire information community. Special projects also have been done for government agencies; for example, NASA, Minerals Management Service. Ms. Jason was an observer at the Federal Pre-White House Conference on Libraries and Information Services held at the National Library of Medicine in November 1990 and the White House Conference on Libraries and Information Service, 1991. Ms. Jason was awarded the US Department of Commerce Bronze Medal in 1977 and 1999. She was awarded the Society of Fire Protection Engineers Director’s Award for the 1992 Outstanding Committee Chair, as the Chair of the inFIRE Advisory Committee. She is a member of the Special Libraries Association, inFIRE, and the Textile Information Users Council.
As a Guest Researcher, Ms. Jason was the Associated Editor of FIRE.GOV. It is an electronic newsletter for the fire service worldwide, bringing news of current international research to them. Technical reports, photographs, videos, and websites provide greater insight to the reader.