CAJ | 학술논문

通过实验研究了沥青喷雾燃烧特性以及细水雾抑制沥青喷雾火的有效性.细水雾雾场特性由LDV/APV系统测量.实验中的温度数据由热电偶测量,沥青喷雾火自由燃烧时火焰结构则由热像仪获取.实验结果显示,喷雾火燃烧时最高温度发生在火焰团内部.当压力比比较高时(pw/Pf＞2.65),细水雾对沥青喷雾火有较好的抑制熄灭作用;而当压力比比较低高时(pw/pt≤2.65),细水雾只能抑制包围火焰团而无法彻底熄灭火焰.较高压力的细水雾能够有效地抑制熄灭沥青喷雾火.
통과실험연구료력청분무연소특성이급세수무억제력청분무화적유효성.세수무무장특성유LDV/APV계통측량.실험중적온도수거유열전우측량,력청분무화자유연소시화염결구칙유열상의획취.실험결과현시,분무화연소시최고온도발생재화염단내부.당압력비비교고시(pw/Pf＞2.65),세수무대력청분무화유교호적억제식멸작용;이당압력비비교저고시(pw/pt≤2.65),세수무지능억제포위화염단이무법철저식멸화염.교고압력적세수무능구유효지억제식멸력청분무화.
Burning behaviors of the spray bitumen mixture were investigated experimentally.Investigations of the suppression methods of this typical kind of fire were also included. The characteristics of water mist were tested by LDV/APV system. Temperatures were measured by thermocouples and the internal structure was observed by Thermography. Results indicated that the highest temperature was measured in the core of the spray. At the lower pressure ratio (pw/pf≤2.65), the water mist envelops the spray fire into a ball of fire. At the higher pressure ratio (pw/pf＞2. 65), the water mist suppressed the spray fire within a short time. The higher pressure water mist demonstrated higher efficiency for the suppression of spray fires.