Diagnostics

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35th International Combustion Symposium a Resounding Success
Post, September 22, 2014 • Elaine Oran, a professor of engineering at the University of Maryland, gave the keynote address on “Understanding explosions: From catastrophic accidents to the creation of the universe.” (Photos by Dino Vournas) The 35th International Combustion Symposium, the premier conference on combustion science and application held on August 3–8 in San...
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A New Concept for Time-Resolved Fourier-Transform Spectroscopy
Post, November 22, 2013 • In developing the dual etalon frequency comb (DEFCOM) spectrometer, CRF researchers Haifeng Huang and David Chandler are refining a new concept for time-resolved Fourier-transform (FT) spectroscopy based on the interference between two transient frequency combs. By opening the door to many potential uses—including time-resolved, high-resolution, broad-band spectroscopy with a microsecond...
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CRF Researchers Make Significant Contributions to Laser Diagnostics in Combustion Conference
Post, September 6, 2013 • Tom Settersten, manager of the Combustion Chemistry and Diagnostics Department, chaired the biennial Laser Diagnostics in Combustion Gordon Research Conference, held August 11–16 in New Hampshire. Former CRF manager, Mark Linne (now director of the Combustion Engine Research Center at Chalmers University, Gothenburg, Sweden), who was vice-Chair for this meeting,...
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David Osborn Receives Lockheed Martin NOVA Award
Post, September 7, 2013 • David Osborn Chemist David Osborn was recently awarded a Lockheed Martin NOVA Award. This award honors individuals who have made outstanding contributions to Lockheed Martin’s mission and business objectives in the four categories of exceptional service, leadership, teamwork, and technical excellence. David received a Technical Excellence Award for his groundbreaking...

Negative Valve Overlap: A Key to Controlling Lean, Gasoline Auto-Ignition?
Post, October 21, 2013 • By Richard Steeper The drive for cleaner, more efficient engines has pushed research toward low-temperature gasoline combustion (LTGC) strategies that offer hope of achieving mandates for ultra-low engine-out emissions. Such strategies typically exploit auto-ignition to avoid the high-temperature flames associated with spark ignition. However, this approach makes LTGC control a...
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New Diagnostic Capability Provides 3-D Measurements of Turbulent Flame Dynamics Using High-Repetition Rate Tomographic Particle Image Velocimetry
Post, July 24, 2014 • Capturing turbulence–flame interaction structure and studying time–history effects requires high-speed volumetric measurements performed at repetition rates sufficiently fast to resolve the relevant flow time scales. Advances in the CRF’s imaging diagnostic capabilities are overcoming these challenges to provide a more complete picture of the structure and dynamics of turbulence–flame interactions....
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New Polarized-Depolarized Measurement Capability Extends Use of Raman/Rayleigh Methods to More Flame Types
Post, February 26, 2014 • By Robert Barlow Allowing single-shot measurements of all major species in nonsooting flames of simple fuels, such as H2 and CH4, spontaneous Raman scattering has been a key CRF laser diagnostic technique for fundamental turbulent-combustion studies. However, laser-induced fluorescence from soot precursors tends to interfere significantly with Raman scattering signals—limiting...
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New Take on an Old Laser Diagnostic Opens Up Additional Avenues for Combustion Research
Post, May 29, 2013 • Coherent anti-Stokes Raman spectroscopy (CARS)—one of the most powerful gas-phase spectroscopic techniques—has been widely used and refined over the last 40 years in many fields of chemical physics, from chemical sensing and standoff detection of biowarfare agents to measuring molecular dynamics. CARS has also been applied to numerous combustion research...
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Novel Spectroscopic Method Reveals Intermediates over a Broad Spectrum
Post, December 2, 2013 • CRF researcher Leonid Sheps has developed a new spectroscopic method, Time-Resolved Broadband Cavity-Enhanced Absorption Spectroscopy (TR-BB-CEAS). The new technique is capable of following the time evolution of transient intermediates as they are produced and consumed in a gas-phase chemical reaction by monitoring their absorption of near-UV to visible light (300–700...
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Paul Miles Appointed Manager of Engine Combustion Department
Post, July 8, 2014 • Paul Miles On June 6, Paul Miles became manager of the CRF’s Engine Combustion Department, which focuses on building the science base needed by industry to develop new generations of high-efficiency, clean engines. He took over the helm from departing manager Dennis Siebers, who recently retired from Sandia National Laboratories....

SAE International Honors CRF Researchers for Outstanding Presentations
Post, July 25, 2014 • Joseph Oefelein Solid technical work is great—but the ability to communicate effectively about that work is equally critical. To acknowledge the importance of good communication—and maintain a high quality of presentation at its technical meeting—SAE International established the SAE Excellence in Oral Presentation award in 1972. This year, two Sandians,...
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Sandia Engaged in Upcoming Combustion Symposium and Workshops
Post, April 29, 2014 • A number of CRF staff members are active in organizing the 35th International Symposium on Combustion. This biennial event, which brings together more than 1,000 scientists, engineers, and others from around the world to explore the latest developments in combustion science, will be held from August 3–8, 2014, at the...
Symposium on Comubstion Poster

Students and Professors Spend the Summer at Sandia under DOE’s WDTS Program
Post, August 20, 2014 • This past summer, the CRF was the research home to 11 students and 2 professors who participated in the DOE Office of Science's Workforce Development for Teachers and Scientists (WDTS) Program. By allowing students and professors to conduct research internships at national laboratories, this program is helping to develop the...
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Turbulent Jet Flame Database Generated for Sooty Fuels
Post, August 30, 2011 • Figure 1. Design drawings of burner (a and b), showing the central fuel tube surrounded by a perforated plate that supports small pilot flames for stabilizing high-speed flames. Photograph (c) of pilot flames and the base of an ethylene jet flame. The CRF has a long and distinguished history of...

VFP Professor Balint Sztaray Continues CRF Collaboration
Post, July 24, 2014 • Balint Sztaray, a professor of Chemistry at University of the Pacific Over the past two summers and a sabbatical semester in 2013, University of the Pacific (UOP) chemistry professor Balint Sztaray and his research group have been working with the CRF’s David Osborn on a project to improve the selectivity...
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Working Toward Success: A Look at the Engine Combustion Network
Post, October 12, 2012 • American industrialist Henry Ford once said, “If everyone is moving forward together, then success will take care of itself.” Ford was no doubt speaking on the basis of his business expertise but some 150 years later, his ideas of success are still in motion at the Combustion Research Facility (CRF)....
Pickett ECN Engine