Application of laser diagnostics to the study of turbulence – flame interactions
Event details
| Date | 09.02.2016 |
| Hour | 14:00 › 15:00 |
| Speaker | Dr. Bruno Coriton, Combustion Research Facility, Sandia National Laboratories, Livermore, CA |
| Location | |
| Category | Conferences - Seminars |
Combustion is the workhorse of our energy and transportation industries and will continue to play an important role in the global economy for the foreseeable future. In light of increased concern with fossil fuel supplies and pollutant emissions, significant fundamental research advances toward the development of clean, highly-efficient and fuel-flexible technologies are essential. Practical combustion devices operate under turbulent conditions. By studying the interplay between turbulence and flame chemistry, my research addresses the conflicting requirements of low-emission, high efficiency schemes with high combustion stability. My research approach is to design and study compact, well-characterized laboratory flames, featuring key turbulent combustion dynamics encountered in more complex combustion systems such as engines, and to apply advanced laser-based diagnostics for quantitative analysis of important phenomena involved in these flames.
Intense turbulence – flame interactions can result in frequent localized extinctions that negatively impact the stability, efficiency and pollutant emissions of a combustion system. Understanding and predicting the conditions leading to frequent local flame extinctions are therefore key to the design of practical combustion devices. First, I will discuss how Laser Induced Fluorescence (LIF) imaging of CO, OH and CH2O was employed to probe the turbulent flame structure, key reaction rates and extinctions in turbulent premixed flames exposed to mixing with hot combustion products. Although it is not accounted for in the standard theoretical framework, flame mixing with combustion products, as encountered in practical combustion devices, affects the flame stability and frequency of localized extinctions. Second, I will show how recent developments using simultaneous high-speed, Tomographic Particle Image Velocimetry (TPIV) and OH LIF can be used to study the dynamics of localized extinctions in turbulent flames. High-speed laser diagnostic techniques have the potential to unveil entirely new insights into turbulent combustion dynamics.
Bio: Dr. Bruno Coriton’s research aims to develop improved combustion processes and technologies for energy production and transportation. He is a postdoctoral fellow in the Advanced Imaging Lab at the Combustion Research Facility of Sandia National Laboratories in California. He received his Ph.D. degree in Mechanical Engineering from Yale University and his B.S. degree in Aeronautical and Mechanical Engineering from l’Ecole Nationale Supérieure de Mécanique et d’Aérotechnique (ENSMA) in France.
Intense turbulence – flame interactions can result in frequent localized extinctions that negatively impact the stability, efficiency and pollutant emissions of a combustion system. Understanding and predicting the conditions leading to frequent local flame extinctions are therefore key to the design of practical combustion devices. First, I will discuss how Laser Induced Fluorescence (LIF) imaging of CO, OH and CH2O was employed to probe the turbulent flame structure, key reaction rates and extinctions in turbulent premixed flames exposed to mixing with hot combustion products. Although it is not accounted for in the standard theoretical framework, flame mixing with combustion products, as encountered in practical combustion devices, affects the flame stability and frequency of localized extinctions. Second, I will show how recent developments using simultaneous high-speed, Tomographic Particle Image Velocimetry (TPIV) and OH LIF can be used to study the dynamics of localized extinctions in turbulent flames. High-speed laser diagnostic techniques have the potential to unveil entirely new insights into turbulent combustion dynamics.
Bio: Dr. Bruno Coriton’s research aims to develop improved combustion processes and technologies for energy production and transportation. He is a postdoctoral fellow in the Advanced Imaging Lab at the Combustion Research Facility of Sandia National Laboratories in California. He received his Ph.D. degree in Mechanical Engineering from Yale University and his B.S. degree in Aeronautical and Mechanical Engineering from l’Ecole Nationale Supérieure de Mécanique et d’Aérotechnique (ENSMA) in France.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- IGM
Contact
- Prof J. Botsis