Modeling on Temperature and Ventilation for Fire in a Tall, Narrow Atrium

Satoh, Hiroomi; Sugawa, Osami; Kurioka, Hitoshi

doi:10.3130/aija.59.1_9

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Q *~~/~ obtained from the experiments in the full scale atrium space and the reduced one. The detailed derivation of C is not discussed here, as it is defied by c -(j/(cD ~I ) )~'~(~K~/ ( I + K2))213(H2/A)y3 [12] including the opening factor of K=bxh/A,.…”

Section: Measurements and Observations A) Temperature And Velocitymentioning

confidence: 99%

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Plume Behavior In A Confined Tall And Narrow Space-as One Of Sub-models Of Plume For An Atrium Fire-

Hiroomi¹,

Sugawa²,

Kurioka³

et al. 1994

Fire Safety Science - Proceedings of the Fourth International S

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Experimental study on a flow behavior of flame and plume was carried out using a full scale atrium model and a reduced one having low-inlet and high-outlet openings under natural ventilation condition. Similarities between these spaces were pursued on representative ATIT in the space and on the inflow behavior which is represented by Froude number estimated at the lower opening(s). Interaction between inflow and flame/plume in the confined space was investigated using the reduced model with some variations of inlet opening arrangements. Temperatures and velocities were measured in a flame, plume, and in the confined space to characterize their vertical and horizontal distributions. Observations on visualized door jet(s), flame inclination (direction and angle), and flame heightnength were also conducted in the reduced model. Horizontal distributions of temperature and of velocity are well simulated by doubled Gaussians considering central core region and turbulent peripheral region. Decreasing mode of temperature and velocity along the ascending trajectory in of the core parts were similar to those obtained in an open space. Flame length which is affected by direct or indirect door jet(s) showed the similar manner against heat release rate but lower than these in an open space. And dimensionless flame shape was well correlated to the 3Yi3 power of dimensnsionless heat release rate modified with a Froude number. Overall entrainment into a conhed space is proportional to the 215 power of dimensnsionless heat release modified by a Grashof number. The confined flame affected with door jet(s) showed the normalized plume radius, b/z, increased about 1.9 times faster than it observed in a free plume in the lower region of the plume.

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Section: Measurements and Observations A) Temperature And Velocitymentioning

confidence: 99%

“…shows the representative temperature rise, ATIT, obtained from the both atrium spaces as a function of Q*d2/3/(CD.C1/2)[12], where -type(l50cm opening) Froude number evaluated at the inlet opening as a function of dimensionless modified heat release rate obtained from a full scale model atrium and a reduced one.…”

mentioning

confidence: 99%

Plume Behavior In A Confined Tall And Narrow Space-as One Of Sub-models Of Plume For An Atrium Fire-

Hiroomi¹,

Sugawa²,

Kurioka³

et al. 1994

Fire Safety Science - Proceedings of the Fourth International S

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COMPOSITION OF CONTEMPORARY ATRIUM BUILDINGS IN JAPAN : A study on architectural composition with volumetric units (4)

次郎

慶一郎

一成

1998

Transactions of AIJ

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The slロ dy 卩 s aim is to clarify tbe composilional characterislics of contemporary alrium buildings in j 叩 all and thcir rclation − ship 101he bui ［ ding function ， Materials 訂 e analyzed in two le ＞els of composition ；arrangemelltof space in circulatiol 甲 ath and visual openness in the alrium ． Comparing thc whole composi ヒion of lhe buildings ， lhree rundamellial composiIional rhelorics are struc 田 rized ；emphasis and easing ofcon 宣 rasnn circulation path and visual co 爪 rast by thc circula ↓ ion patl1 ，

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Flame Inclination With Induced Wind Through Inlet Opening In A Tall And Narrow Atrium

Satoh¹,

Sugawa²,

Kurioka³

1997

Fire Safety Science - Proceedings of the 5th International Symp

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Inclination behavior of flames affected by the induced door jet(s) into a tall and narrow atrium space was studied experimentally. The inlet opening(s) were arranged to simulate the configuration of one door and two doors. Induced air velocity through door(s) was estimated considering stack effect and atrium space configuration. In the case where the separation between two doors is smaller than twice width of a door, door jets merged and affected the flame resulting the flame inclination, similar to the single door jet effects. The distribution of the door jet, not at and near the inlet opening but in the atrium space, showed the normal distribution curve. Those of merged door jets demonstrated the additivity of the configurational contribution based on the setting locations of doors. A simple model which gives the estimation of the attacking door jet velocity on a flame is presented considering door configurations, location and size of a fire source, heat release rate, and space factor of an atrium space.

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Modeling on Temperature and Ventilation for Fire in a Tall, Narrow Atrium

Cited by 3 publications

References 5 publications

Plume Behavior In A Confined Tall And Narrow Space-as One Of Sub-models Of Plume For An Atrium Fire-

Plume Behavior In A Confined Tall And Narrow Space-as One Of Sub-models Of Plume For An Atrium Fire-

COMPOSITION OF CONTEMPORARY ATRIUM BUILDINGS IN JAPAN : A study on architectural composition with volumetric units (4)

Flame Inclination With Induced Wind Through Inlet Opening In A Tall And Narrow Atrium

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