Research
Target of our research
Safety Engineering
・Understanding disaster phenomenon scientifically
・Structuring a high-reliability security system
Combustion Theory
・Basic combustion phenomenon
・Thermal hydrodynamics
Research topics
Gas Explosions
Assessment of confined and unconfined gas explosion is conducted. When propagating flame is accelerated due to the instability, pressure rise rate is increased in case of confined gas explosion, and blast wave is enhanced in case of unconfined gas explosion. As a result, acceleration of propagating flame is crucial for accurate estimation of gas explosion's risk. Experiments from laboratory scale to large scale are conducted in order to analyze the flame propagation phenomena and develope the assessment model of gas explosion.
Dust explosion
As a high risk industrial disaster, dust explosion is a complex phenomenon that flame propagates in the heterogeneous medium, where particles undergo heating, vaporization/pyrolysis, mixing with oxidizer, ignition, burning, and flame extinction. We aim to reveal flame propagating mechanism and evaluate the risk of submicron particle (0.1 – 1 µm).
Fire Whirl
Fire whirl is the phenomenon that behavior of fire changes by interaction between a flame and a swirl. It has been observed in large scale forest fire and in the Great Kanto Earthquake. Fire whirl causes increases of not only flame height also fuel consumption rate and fire spread rate, which contributes to expansion of fire damage. The mechanism and the influence of fire whirl are examined.