Soot particles originate from incomplete combustion, for example in engines or wildland fires, and pose a pollutant harmful to human health and significantly contributing to climate change. In their recent work a team at LTT Erlangen, in collaboration with Shanghai Jiao Tong University, developed a method to comprehensively investigate soot formation in turbulent flames. Following a laser pulse that heats up the particles, the subsequent thermal radiation can be detected and analyzed for quantities such as concentration and particle size. This size is on the order of a few tens of nanometers, less than a thousandth of the thickness of a human hair. With the help of optical fiber bundles, multiple specialized cameras and tomographic reconstruction methods they were able to obtain three-dimensional information.
By measuring several quantities simultaneously in 3D, they could follow the growth and oxidation of soot particles in turbulent flames and could correlate the information acquired to shed light on particle formation conditions.
One overarching goal of this research path of LMQ-member Stefan Will and his team at LTT Erlangen is the better understanding of (nano-)particle formation processes through optical diagnostics. This research also aims at the dedicated synthesis of engineered nanoparticles, which have eminent importance in composite materials, optoelectronics and medicine.
Further details can be found in their paper:
Tomographic single-shot time-resolved laser-induced incandescence for soot characterization in turbulent flames
Marcel N. Müller, Qian Wang, Weiwei Cai, Franz J.T Huber and Stefan Will
Proceedings of the Combustion Institute 40, 105262 (2024)
Soot particles originate from incomplete combustion, for example in engines or wildland fires, and pose a pollutant harmful to human health and significantly contributing to climate change. In their recent work a team at LTT Erlangen, in collaboration with Shanghai Jiao Tong University, developed a method to comprehensively investigate soot formation in turbulent flames. Following a laser pulse that heats up the particles, the subsequent thermal radiation can be detected and analyzed for quantities such as concentration and particle size. This size is on the order of a few tens of nanometers, less than a thousandth of the thickness of a human hair. With the help of optical fiber bundles, multiple specialized cameras and tomographic reconstruction methods they were able to obtain three-dimensional information.
By measuring several quantities simultaneously in 3D, they could follow the growth and oxidation of soot particles in turbulent flames and could correlate the information acquired to shed light on particle formation conditions.
One overarching goal of this research path of LMQ-member Stefan Will and his team at LTT Erlangen is the better understanding of (nano-)particle formation processes through optical diagnostics. This research also aims at the dedicated synthesis of engineered nanoparticles, which have eminent importance in composite materials, optoelectronics and medicine.
Further details can be found in their paper:
Tomographic single-shot time-resolved laser-induced incandescence for soot characterization in turbulent flames
Marcel N. Müller, Qian Wang, Weiwei Cai, Franz J.T Huber and Stefan Will
Proceedings of the Combustion Institute 40, 105262 (2024)