Research
What is autoignition?
- Flame stabilization of lifted jet flames has been a long-time research topic to understand the fundamentals of practical combustion devices
- As the inlet temperature exceeds the critical value, fuel/air mixture ignites without an external source of ignition
- Stabilization mechanism of autoignited lifted jet flames is not fully understood yet
- We numerically eluciate the fundamental characteristics of autoignited laminar/turbulent flames
DNS of turbulent flames
- High-fidelity simulations known as direct numerical simulations (DNS) of chemically reactive flows, wherein all turbulence and flame scales are numerically resolved, can uniquely provide unprecedented detail into the nuances of fine-scale `turbulence-chemistry' interactions that underpin the behavior of engines for heat and power generation and for transportation utilizing diverse fuels.
- We performed 3-D DNS study of autoignited hydrogen/air flame at autoignitive condition, revealing the stabilization mechanisms of the jet flames depending on the coflow air temperatures.
Supercricial reacting flows
- Any fluid which is (1) heated to a temperature above its critical temperature and (2) compressed to a pressure greater than its critical pressure is called supercritical fluid
- Supercritical fluid is a fluid acting as a gas, while being almost as dense as a liquid
- We developed real-fluid thermophysical models in OpenFOAM
