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研究生:廖俊榮
研究生(外文):Chun-Jung Liao
論文名稱:火災煙柱模式與補氣系統對中庭建築煙控系統設計之影響分析
論文名稱(外文):The analysis of fire plume model and air inlet system on smoke management system desigh in the atrum
指導教授:楊冠雄楊冠雄引用關係
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:87
中文關鍵詞:火災
外文關鍵詞:Firesmoke exhaust systemPlume
相關次數:
  • 被引用被引用:13
  • 點閱點閱:512
  • 評分評分:
  • 下載下載:149
  • 收藏至我的研究室書目清單書目收藏:0
當火災發生時,煙會由火源上升至屋頂,在沿著天花板橫向擴散至牆壁,然後煙層會累積在天花板下方並開始沈積。煙層的沈積速率取決於火災產生的煙量。目前此部分之研究,大都集中於探討空曠區域的Axisymmetric plume,但對於發生於建築物邊緣之Wall plume或Corner plume,則未有太多相關研討。另外,設計者對於估算火場當中的發煙量時,通常只是簡單的由火載量大小作為判斷。但是鮮少有設計者考慮到有關補氣方面的問題。因此本文之主要目的便是探討不同的煙柱模式與補氣系統對於中庭建築排煙系統之影響。
本文首先經由文獻收集世界上有關中庭建築煙控系統的設計準則及火災煙柱捲吸率預測公式,分別將其套用於不同的火災煙柱模式下,當在火災發生於牆邊與牆角時,適合使用何種預測公式。再者,針對補氣口大小對於機械排煙與自然排煙系統,與不同建築物尺寸做一整體研究,觀察補氣口大小對於煙層淨高的影響,並設法找出其規律性。
最後,本文將會提出以何種煙柱捲吸率預測公式及煙柱模式,作為火災設計考量最為安全。以及補氣口在各種不同的補氣、排煙系統中,會產生何種不同的效果,並對於煙層最後穩定高度的影響狀況。這些都可供日後消防安全設計者作為設計參考依據,進而使設計者能獲得最佳的煙控系統。
In case of fire, the smoke plum will reach the roof creating a ceiling jet leading to the edge and starting to descend. The smoke descending rate depends heavily on the smoke production rate and the way it was produced. Recent research has been concentrated on the smoke produced in an axi-symmetric plume model, but rarely on wall or corner plume models. In addition, the smoke production rate was estimated based on different fire sizes, which neglected the effect introduced by the make-up air, and is the main theme of this study.
During the earlier stage of this study, the calculation models to predict the smoke entrainment rate was analyzed to identify its effectiveness in calculating the smoke production rate under cornered fires. In addition, the effect of the make-up air on the mechanical and natural smoke exhaust system was analyzed to calculate the corresponding smoke descending rate.
Finally, the optimal calculation model to be utilized for the performance-based fire engineering designs of smoke management systems will be proposed, so that the make-up air effect can also be coupled during the design process.
目錄I
圖目錄III
表目錄VII
符號說明VIII
摘要XI
摘要(英文)X
第一章緒論1
1-1研究背景與目的1
1-2研究方法2
1-3研究內容與步驟4
第二章文獻回顧6
2-1火災煙柱模式6
2-2牆與牆角火災煙柱(Wall and Corner Plume)模式7
2-3補氣口對於煙層高度之影響10
第三章 理論分析11
3-1 場模式11
3-2 格點配置14
3-3 FDS程式驗證17
3-4 選擇煙捲吸率預測公式與N值決定19
第四章 結果與討論28
4-1 Wall plume 與 Corner plume煙捲吸率28
4-2自然補氣口對煙層高度之影響(機械排煙)……….…40
4-3機械補氣對煙層高度之影響(機械排煙)…………….52
4-4自然補氣口煙層高度之影響(自然排煙)…………….54
4-5機械補氣對煙層高度之影響(自然排煙)63
第五章 結論67
參考文獻70
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