1380 lines
107 KiB
Text
1380 lines
107 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<head>
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<h1 class="nist-page__title">Fighting Fire with Fire-Breathing Dragons</h1>
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<div class="daterange"><time datetime="2016-06-22T12:00:00Z">June 22, 2016</time>
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<span>By: </span>
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<figure class="nist-image--lightbox nist-image" data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2019/08/02/Landscape_view_of_wildfire_near_Highway_63_in_south_Fort_McMurray.jpg?itok=uyguvrB7" data-media-id="380226">
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<img loading="lazy" src="/sites/default/files/styles/960_x_960_limit/public/images/2019/08/02/Landscape_view_of_wildfire_near_Highway_63_in_south_Fort_McMurray.jpg?itok=0zkygKDb" width="960" height="600" alt="A line of cars with fire and smoke nearby" title="Highway 63 fire" typeof="foaf:Image" />
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<p>Fort McMurray residents evacuating along Highway 63 as the fire encroaches on the area.</p>
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<div class="nist-image__credit">
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<span class="nist-image__credit-label">Credit:</span>
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DarrenRD [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons
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<p>I’m a dragon wrangler. While that might sound like something straight out of Harry Potter or Game of Thrones, this isn’t fantasy, this is serious science.</p><p>As a dragon wrangler, or more colloquially, a fire researcher, my job is to help protect people and property from fire’s devastating effects. My area of expertise is wildfires, and in particular wildfires that threaten whole communities, which we call Wildland-Urban Interface (WUI) fires. In the U.S. alone there are more than 80,000 wildfires every year. About 2 to 3 percent of those fires threaten populated areas, putting 46 million structures and over 120 million people at risk. And every year, we lose about 3,000 homes to these kinds of fires.</p><p>The <a href="https://en.wikipedia.org/wiki/2016_Fort_McMurray_wildfire">“Beast” wildfire</a> that swept through Fort McMurray, Canada, displaced 88,000 people for a month, destroyed about 2,400 homes, businesses and other buildings, and shut down almost a quarter of Canada’s oil production. For me, watching the news reports and seeing the violence with which that wildfire swept through the town underscored the need for more WUI fire research. The loss of forest, while part of the natural cycle, is unfortunate, but the loss of homes and lives is tragic and unnecessary.</p><p>WUI fires are a significant problem throughout the world. In the past few years, wildfires have affected Australia, Brazil, Chile, France, Greece, Portugal, Spain, and the U.S., and, as the Fort McMurray fire graphically illustrated, it seems like they are only getting worse.</p><p>In fact, President Obama was concerned enough that he recently signed an <a href="https://www.whitehouse.gov/the-press-office/2016/05/18/executive-order-wildland-urban-interface-federal-risk-mitigation">executive order</a> to look into the potential impact that WUI fires could have on federal buildings.</p><p>Part of the reason that WUI fires give us so much trouble is that we don’t know much about them. Historically, most fire researchers have studied fires inside buildings. But unlike a fire confined to a house, WUI fires are unconfined and exhibit incredibly complex behaviors driven by wind, weather, the kind of vegetation, and other factors. When vegetation and structures burn in WUI fires, pieces of burning material known as firebrands (embers) are carried off by the wind and start new fires. Showers of firebrands rained down on neighborhoods during the Fort McMurray fires and are a common characteristic of WUI fires worldwide.</p><p>While the dangers of firebrand showers have been known for decades, little research has been done on them because it’s difficult to realistically replicate and measure them. To do this, me and my colleagues at NIST had to invent an entirely new experimental approach—the <a href="https://www.nist.gov/laboratories/tools-instruments/standard-firebrand-generator">NIST Firebrand Generator</a>—but we just call it the Dragon.</p><p>You can learn more about our Dragon technology by watching the video below.</p><div class="nist-video" data-media-id="567621">
|
||
<div class="video-embed-field"><div class="video-embed-field-lazy" data-video-embed-field-lazy="<div class="video-embed-field-provider-youtube video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allowfullscreen="allowfullscreen" src="https://www.youtube.com/embed/sCchaVOBIMY?autoplay=1&amp;start=0&amp;rel=0&amp;mute=1"></iframe>
|
||
</div>
|
||
"><img alt="Fire breathing NIST dragon" loading="lazy" src="/sites/default/files/video_thumbnails/sCchaVOBIMY.jpg" typeof="foaf:Image">
|
||
<button class="video-embed-field-lazy-play"></button>
|
||
<div class="video-embed-field-lazy-title">Fire breathing NIST dragon</div>
|
||
</div>
|
||
</div>
|
||
|
||
</div>
|
||
<p>We use the Dragon to generate controlled, repeatable firebrand showers that act just like those from real WUI fires, a feat for which California Fire Chief Ethan Foote and I won <a href="https://www.nfpa.org/About-NFPA/Awards/Harry-C-Bigglestone-Award">an annual award from the National Fire Protection Association.</a></p><p>Without standard laboratory test methods, fire researchers can’t evaluate or compare how well different building materials and architectural features like roofs and walls resist being ignited by firebrands. Our current understanding of how well these different building components stand up to WUI fires is still mainly based on informal reports made by untrained observers. As a result, the limited number of WUI building codes and standards we have lack scientific rigor and do not explicitly address firebrand exposure.</p>
|
||
<figure class=" align-center nist-image--lightbox nist-image" role="group">
|
||
<div data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2019/08/19/NIST-dragon.jpg?itok=UtNoiL0-" data-media-id="380221">
|
||
|
||
<img height="671" loading="lazy" src="/sites/default/files/styles/960_x_960_limit/public/images/2019/08/19/NIST-dragon.jpg?itok=nZJQIuDs" typeof="foaf:Image" width="960">
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
<figcaption class="nist-image__caption">Typical of what you might find in your or your neighbor's backyard, we set up an outside corner section of cedar fencing with a bed of shredded hardwood mulch next to it in the foreground. We exposed the cedar fencing to wind-driven firebrand showers moving at 8 meters per second from the mouth of the NIST Dragon. The firebrands first produced smoldering fires in the shredded mulch bed before beginning to flame a few minutes later. </figcaption>
|
||
</figure>
|
||
|
||
<p>To develop firebrand-specific test standards, we need to design full-scale experiments that evaluate—piece by piece and feature by feature—a structure’s vulnerabilities to firebrand showers. For example, in WUI fires, firebrands may penetrate building vents, ignite wood decks and fences adjacent to structures, and blow under tile roofs, all of which could set the building on fire.</p><p>It is critical for us to understand the performance of various full-scale building components when exposed to firebrand showers so that we can zero in on these and other weak points. In turn, this will help us determine how big we need to make building component sections in order to do realistic standard laboratory tests.</p><p>Because firebrand showers are blown by the wind, and wind plays a major role in whether a structure ignites, our experiments also have to take wind into account. To do that, my colleagues and I, in partnership with the <a href="http://www.kenken.go.jp/english/">Building Research Institute (BRI)</a> and the <a href="http://nrifd.fdma.go.jp/english/">National Research Institute of Fire and Disaster (NRIFD)</a>, set up our first international duty station in Japan. BRI maintains one of the only full-scale wind tunnel facilities in the world designed specifically for fire experimentation, the <a href="http://www.kenken.go.jp/english/information/introduction/facilities/shosai/03.html">Fire Research Wind Tunnel Facility (FRWTF)</a>. NRIFD has a smaller-scale wind facility that houses a smaller version of the NIST Dragon, which we call the Baby Dragon.</p><p>The marriage of NIST’s Dragon technology and these experimental facilities is helping us gain new insights into how wind-driven firebrands interact with individual building components and whole structures.</p>
|
||
<figure class=" align-center nist-image--lightbox nist-image" role="group">
|
||
<div data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2019/08/19/baby-dragon.png?itok=5Cj9beyg" data-media-id="380231">
|
||
|
||
<img height="717" loading="lazy" src="/sites/default/files/styles/960_x_960_limit/public/images/2019/08/19/baby-dragon.png?itok=IGI9V-q4" typeof="foaf:Image" width="809">
|
||
|
||
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|
||
|
||
</div>
|
||
<figcaption class="nist-image__caption">We exposed this section of a full-scale concrete tile roofing assembly to firebrand showers moving at 6 meters per second. We determined the size of roofing assembly to use by observing full-scale roofing assembly performance exposed to firebrand showers using the NIST Dragon at BRI. Our experiments showed that firebrands are able to slip under the roof tiles. </figcaption>
|
||
</figure>
|
||
|
||
<p>It’s great to see that other research laboratories worldwide are reproducing our Dragon technology. For example, the <a href="https://disastersafety.org/">Insurance Institute for Business and Home Safety</a> has used the NIST Dragon design to generate firebrand showers in its new wind tunnel facility, which is ideal for large-scale demonstrations. Europe’s largest wildland fire institute, ADAI, with the University of Coimbra in Portugal, has developed the Portuguese Baby Dragon, which they based on our original design.</p><p>So, while the dragons I work with might not be exactly like the ones you find in Harry Potter or Game of Thrones, I still think they're pretty cool. In particular, I’m looking forward to what they’re going to teach us about how to build more fire-resilient—you might even say “dragon-proof”—buildings.</p>
|
||
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|
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|
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<a href="/blogs/taking-measure/categories/248371">Buildings and Construction</a>,
|
||
<a href="/blogs/taking-measure/categories/248376">Building codes and standards</a>,
|
||
<a href="/blogs/taking-measure/categories/248586">Fire</a>,
|
||
<a href="/blogs/taking-measure/categories/2746901">Fire dynamics and science</a>,
|
||
<a href="/blogs/taking-measure/categories/248596">Fire fighting</a>,
|
||
<a href="/blogs/taking-measure/categories/248601">Fire modeling</a>,
|
||
<a href="/blogs/taking-measure/categories/248606">Fire risk reduction</a>,
|
||
<a href="/blogs/taking-measure/categories/2746911">Wildland urban interface fire</a>,
|
||
<a href="/blogs/taking-measure/categories/248946">Materials</a>,
|
||
<a href="/blogs/taking-measure/categories/249051">Metrology</a> and
|
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about="/blogs/taking-measure/authors/sam-manzello" class="nist-teaser"
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<div class="entity-reference"> <a href="/blogs/taking-measure/authors/sam-manzello" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2017/08/15/smanzello.jpg?itok=BVM-zcTC" width="100" height="100" typeof="foaf:Image" />
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|
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|
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|
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<div class="nist-teaser__content">
|
||
<div class="text-with-summary"><p>Samuel L. Manzello is a mechanical engineer in NIST’s Fire Research Division. Sam is fortunate to have conducted thousands of experiments, from floating onboard NASA’s Vomit Comet as part of his Ph.D. thesis on microgravity droplet combustion, to producing soot in combustion reactors to image its nanostructure using transmission electron microscopy, to harnessing the Dragon using large wind tunnels in Japan, just to name a few.</p></div>
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<div><div class="js-view-dom-id-b4c9e18cfb5649f361e69d9293af21cb2f539b2425ef0d6a8b076a8163527098">
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<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/insulation-melts-your-walls-and-could-reduce-your-energy-costs"><span>The Insulation That Melts in Your Walls — and Could Reduce Your Energy Costs</span>
|
||
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|
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|
||
<div class="daterange"><time datetime="2025-02-26T12:00:00Z">February 26, 2025</time>
|
||
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||
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<div class="text-with-summary"> Wherever humans go, we take some form of insulation with us to keep us at just the right temperature. But just because the idea is old doesn’t mean that there
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<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/drones-disaster-zones-how-advanced-3d-mapping-technology-can-help-first"><span>Drones in Disaster Zones: How Advanced 3D Mapping Technology Can Help First Responders Save Lives</span>
|
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|
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<div class="text-with-summary"> NIST is working to help emergency workers have more information in a crisis by encouraging the development of advanced drones at an affordable price.
|
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<h3 class="nist-teaser__title"><a href="/blogs/taking-measure/speeding-wheels-justice-how-nist-resources-can-help-crime-labs-work-faster"><span>Speeding Up the Wheels of Justice: How NIST Resources Can Help Crime Labs Work Faster</span>
|
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<div class="daterange"><time datetime="2025-01-08T12:00:00Z">January 8, 2025</time>
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<div class="text-with-summary"> Forensic science is not as easy as it looks on TV. But NIST resources are helping crime labs examine evidence more efficiently — so the justice system can work
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