Scramjet Propulsion
One of our core research area is propulsion science and engineering for the development of scramjet-powered hypersonic vehicles. We study fundamentals of fluid mechanics and combustion and their applications to the propulsion system. Particularly, scramjet inlet-isolator unstart, streamline-tracing inlet design, flow control, and supersonic combustion are the main focus of our research.
- Scramjet Unstart
Unstart refers a disgorgement of designed scramjet inlet flows due to mismatched upstream and downstream pressures, improper contraction of the captured flows, etc.
We study fundamentals of scramjet unstart and develop flow control methods to remedy the unstart issue in developing scramjet-powered vehicles.
- Streamline-tracing Inlets
For more efficient compression, streamline-tracing inlets have been investigated. In our group, we are particularly interested in developing a scoop-type inlet that could reduce drag and improve efficiency.
We conduct both experimental and computational studies for scoop inlets.
Plasma-assisted Tech.
Energy conversion, propulsion, and combustion systems can be benefited by plasma-assisted technologies. Among many plasma-assisted technologies, plasma-assisted fuel reforming, flow control, and combustion control are our research interests. We perform both fundamental and applied research for plasma-assisted technologies.
- Laser Ignition
Laser ignition can extend flammability limit of fuel-air mixtures, increase ignition probability, and enhance flame propagation. We study fundamental process and characteristics of optically-induced plasma discharges for various pulsing strategies.
- Plasma Flow Control
We study flow control by non-thermal plasma discharges such as dielectric barrier discharge and corona discharge.
- Plasma-assisted Fuel Reforming and Combustion
Fire/Wildland Fire
Fire and wildland fire are catastrophic events that threat our lives and properties. We must have a better way to fight against fire and wildfire. Improving fire-fighting technologies is one way, and at the same time, we must have a technology that can predict fire and wildland fire behaviors including ignition and fire spread. An accurate prediction tool will provide better knowledge for fire prevention and fighting.
However, accurate prediction of fire is not a trivial task. It requires multi-scale and multi-physics model development and extensive numerical and experimental studies to validate. We are trying to provide a better sense of phenomenon by conducting both experimental and numerical studies. One example of research activities in our lab is fire wind tunnel experiment. We developed a wind tunnel (currently hosted at WPI, MA USA) that can be deployed to forest so we can conduct experiments with real fuels in wildland. Also, we are currently developing additional wind tunnels (small- and mid-scales) at Korea University that can bridge multi-scale phenomena we have to deal with. Below is a description for the wind tunnel at WPI and example of fire spread experiments for a pine needle layer at 3 m/s wind speed.
국가
대한민국
소속기관
고려대학교 (학교)
연락처
02-3290-3356 https://sites.google.com/view/gplkorea
책임자
임성규 sim3@korea.ac.kr