Flow Behavior of Ejected Fire Flame and Plume from an Opening effect by External Side Wind

外部侧风打开效应导致喷射火焰和羽流的流动行为

• 批准号: 07650694
• 负责人: SUGAWA Osami
• 金额: $ 1.34万
• 依托单位: Center for Fire Science and Technology, Science University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650694/
• 关键词: Trajectory; Ejected Flame; External Wind; Flame Inclination; Opening; 開口(窓); 無次元発熱速度; フル-ド数

A reduced-scale experimental study was carried out to collect a knowledge of the effect of external side wind on the flow behavior of a flame/plume which is ejected from an opening of a fire compartment. The external side wind was given to the flame/plume at the various speeds of 0.06m/sec to 1.88m/sec. Upward velocities and temperatures of the flame/plume and in the hot current were measured systematically along the wall for vertical and horizontal directions. The equivelocity and temperature contours gave the location of the trajectory (trace of main flow axis) as the highest possibility of the appearance where highest upward velocity and temperature observed Decreasing modes of the temperature and upward velocity for vertical direction along the trajectory showed similar behaviors of those obtained in the flow from a line fire source. The slope of the trajectory inclined by side wind and of which slope was estimated based on the experimental data. A simplified model on the trajectory slope (or flame inclination slope) can be described by the coupled function of dimensionless heat release rate, Froude number and the aspect ratio of the opening base on the balance of buoyancy and inertia force of side wind as well as the aspect ratio of the opening and heat release rate.

通过实验研究，了解了外部侧风对从防火分区开口处喷出的火焰/羽流流动特性的影响。以0.06m/sec至1.88m/sec的各种速度向火焰/羽流提供外侧风。向上的速度和温度的火焰/羽流和在热的电流系统地测量沿着壁的垂直和水平方向。等速和温度等值线给出了轨迹的位置（主流轴的轨迹），作为观察到最高向上速度和温度的最高可能性出现的位置。沿轨迹的垂直方向沿着温度和向上速度的下降模式显示出与线火源流动中获得的行为相似的行为。侧风作用下弹道的斜率，并根据实验数据估算了其斜率。基于浮力和侧风惯性力的平衡，以及开孔长宽比与热释放率的关系，建立了无量纲热释放率、弗劳德数和开孔长宽比的耦合函数来描述弹道斜率（或火焰倾斜斜率）的简化模型。

项目成果

Daisuke Momita, Osami Sugawa, Yoshibumi Ohmiya, Atsuo Inoue, and Takao Wakamatsu: "Flow Behavior of Ejected Flame/Plume from an Opening Affected by External Wind" Annual Meeting of Japanese Assoc.on Fire Safety Engineering. 115-119 (1996)

Daisuke Momita、Osami Sukawa、Yoshibumi Ohmiya、Atsuo Inoue 和 Takao Wakamatsu：“受外部风影响的开口喷射火焰/羽流的流动行为”日本消防安全工程学会年会。

OSAMI SUGAWA et al.: "FLOW BEHAVIOR OF EJECTED FIRE/PLUME FROM AN OPENING EFFECTED BY EXTERNAL SIDE WIND" Proc.of 5th Conf.Int.Assoc.Fire Safety Science. 印刷中 (1997)

OSAMI SUGAWA 等人：“受外部侧风影响的开口喷射火焰/羽流的流动行为”Proc.of 5th Conf.Int.Assoc.Fire Safety Science 已出版（1997 年）。

Daisuke Momita, Osami Sugawa, Yoshibumi Ohmiya, and Takao Wakamatsu: "Flow Behavior of Ejected Flame/Plume from an Opening Affected by External Wind" Annual Meeting of the Arch.. Inst.of Japan. 85-86 (1996)

Daisuke Momita、Osami Sukawa、Yoshibumi Ohmiya 和 Takao Wakamatsu：“受外部风影响的开口喷射火焰/羽流的流动行为”日本建筑研究所年会。

OSAMI SUGAWA: "Flow Behavior of Ejected Flame/Plume from an Opoening" FIRE AND MATERIALS. (発表予定).

OSAMI SUGAWA：“开口处喷射火焰/羽流的流动行为”《火灾与材料》（待公布）。

OSAMI SUGAWA et al.: "FLOW BEHAVIOR OF EJECTER FIRE FLAME/PLUME FROM AN OPENING" Proc.5th Conf.Int.Assoc.on Fire Safety Science. (印刷中). (1997)

OSAMI SUGAWA 等人：“开口处喷射器火焰/羽流的流动行为”Proc.5th Conf.Int.Assoc.on 消防安全科学（1997 年）。