Engine Combustion

Direct Measurement of Key Molecule Will Increase Accuracy of Combustion Models

Sandia researchers are the first to directly measure hydroperoxyalkyl radicals—a class of reactive molecules denoted as “QOOH”—that are key in the chain of reactions that controls the early stages of combustion. This breakthrough has generated data on QOOH reaction rates and outcomes that will improve the fidelity of models used by engine manufacturers to create […]

By |March 3rd, 2015|Computational Modeling & Simulation, CRF, Energy, Facilities, News, News & Events, Sensors & Optical Diagnostics, Transportation Energy|Comments Off on Direct Measurement of Key Molecule Will Increase Accuracy of Combustion Models

New Polarized-Depolarized Measurement Capability Extends Use of Raman/Rayleigh Methods to More Flame Types

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 Combustion Research Facility (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 this method’s utility. Such fluorescence […]

By |April 23rd, 2014|Capabilities, CRF, Energy, Facilities, News, News & Events, Research & Capabilities, Sensors & Optical Diagnostics, Transportation Energy|Comments Off on New Polarized-Depolarized Measurement Capability Extends Use of Raman/Rayleigh Methods to More Flame Types

New Conceptual Insights into Diesel Engine Fuel-Injection Processes

By combining advanced theory and high-fidelity large eddy simulation, Combustion Research Facility (CRF) researchers Rainer Dahms and Joe Oefelein (both in 8351) have provided new conceptual insights that promise to improve the understanding and prediction of fuel-injection processes in high-pressure diesel engine conditions. Their results, which experiments performed by CRF researchers Lyle Pickett and Julien […]

By |April 15th, 2014|Capabilities, CRF, Energy, Facilities, News, News & Events, Research & Capabilities, Systems Analysis, Transportation Energy|Comments Off on New Conceptual Insights into Diesel Engine Fuel-Injection Processes

Lyle Pickett Named a Society of Automotive Engineers Fellow

Lyle Pickett (in Sandia’s Engine Combustion Dept.) was just elected to a Society of Automotive Engineers (SAE) Fellow-grade membership. He was selected based on his pioneering research on direct-injection engine fuel sprays and the international leadership he has brought to the field. His contributions are providing both a new understanding of the fundamentals of fuel […]

By |October 22nd, 2013|CRF, Energy, Facilities, News, News & Events, Transportation Energy|Comments Off on Lyle Pickett Named a Society of Automotive Engineers Fellow