A comparative study on the relationship between estimates of critical velocity and number of jet fans for smoke control - A 'Fire-JF' contour map in road tunnels

Hyo-Gyu* Kim; Eun-Soo Kim; Nam-Young Kim; Chang-Woo Lee

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2004 Vol.6, Issue 4 Next Page

A comparative study on the relationship between estimates of critical velocity and number of jet fans for smoke control - A 'Fire-JF' contour map in road tunnels 임계속도와 제연팬 용량의 상관관계 연구 - 도로터널의 제연팬 특성도 연구

31 December 2004. pp. 269-278

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Abstract

Recently, critical velocity has become a topic to attract most interests from the researchers in the field of tunnel safety. As the minimum velocity to prevent smoke backlayering during a fire, many equations have been proposed so far, and the following three equations are being considered as a standard method in Korea to calculate the capacity of smoke extraction fans. Equation by Kennedy based on Froude number, Tetzner’s equation with additional variable, β to modify the Kennedy's equation, and the equation with the concept of super critical velocity by Wu are studied in this paper for the comparative purpose. A contour map describing the relationship between the critical velocity and the capacity of smoke extraction fans is proposed as a tool to calculate the number of jet fans for smoke control during a fire in the local tunnels,

Keywords

Critical velocity

smoke control

‘Fire-Jet Fan’ contour map

road tunnel

최근 임계속도 (critical velocity)는 터널안전 분야의 연구자들로부터 많은 관심을 끌고 있는 주제가 되고 있다. 이러한 임계속도는 화재시 화재연의 역류 (backlayering)를 방지하기 위한 최소유속으로써 지금까지 많은 식들이 제안되고 있으며, 다음의 3가지 식들이 제연팬의 용량을 산정하기 위한 국내 기준으로 고려되고 있다. Froude 수에 기초한 Kennedy 식, Kennedy 식을 수정하여 β 변수값을 고려한 Tetzner 식, 그리고 초임계속도(super critical velocity) 개념을 도입한 Wu 식 등이 본 연구의 비교 분석대상이며, 또한 임계속도와 제연팬 용량간의 관계를 보여주는 등고선도 (제연팬 특성도)는 국내 도로터널의 화재시 제연팬의 대수를 산정하기 위한 툴로써 제시되고 있다.

키워드

임계속도

제연

제연팬 특성도

도로터널

References

1. W.D. Kennedy, (1996), “Critical Velocity: Past, Present and Future”, The One Day Seminar of Smoke and Critical Velocity in Tunnels, ITC (London).

2. NFPA Code 502, (2001), “Standard for Road tunnels, Bridges, and Other Limited Access Highways”, 2001 Edition.

3. D.Tetzner et al, (1999), “Critical Velocity- Com-parative Assessment of Test Results and CFD Simulation”, Tunnel Fires and Escape from Tunnels, ITC, pp. 181-190.

4. 한국도로공사, (2002.12), “고속도로 터널 방재시스템 연구 (최종보고서)”, 한국기계연구원 (KIMM), pp. 75-77.

5. Y.Wu et al, (2000), “Control of smoke flow in tunnel fires using longitudinal ventilation system - a study of the critical velocity”, 10th ISAVVT, pp. 639-657.

6. D.Ris, (1970), “Duct fires”, Combustion & Science Technology.

7. 한국도로공사, (2002.10), “고속도로 터널 환기시설 설계기준”.

8. 김효규, 이창우 외, (2003.6), “지역별 소요환기량 특성도를 활용한 제트팬 환기방식 가능 터널제원 결정연구”, 한국암반공학회, Vol. 13, No. 3, pp. 235-243.

9. 김은수, 김효규, 소충섭, (2003.12), “터널 방재계획의 재조명”, 대한토목학회, 제3회 터널 시공기술 향상 대토론회 논문집, pp. 31-51.

10. TVENT, (2003.6), “2003년도 1/4～2/4분기 정기모임 자료집 (주제: 임계속도에 대하여)”.

11. FHA, (1995.11), “Memorial Tunnel Fire Ventilation Test Program (Test Report)”, Massa. Highway Dept. & Federal Highway Admin., pp. 8-32.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 6
No :4
Pages :269-278

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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