کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7153248 | 1462473 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of mechanical smoke exhaust on smoke spread in underground tunnel
ترجمه فارسی عنوان
تأثیر اگزوز دود مکانیکی بر گسترش دود در تونل زیرزمینی
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کلمات کلیدی
گسترش دود، طول رفلکس، شبیه سازی عددی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
The model of a tunnel in Beijing is established, and the smoke reflux, the smoke reflux length and the influence of longitudinal wind speed on temperature distribution of the tunnel vault are studied using numerical simulation method. The length of the tunnel is 150â¯m, the cross section is circular, the height of the tunnel is 6.3â¯m and the width is 6â¯m. The simulation results show that the smoke reflux length of the subway tunnel fire decreases with the increase of the longitudinal positive pressure wind speed, and the reflux length decreases linearly with the increase of wind speed when the reflux length is more than 10â¯m. The gradient of the reflux length decreases with the increase of the wind speed when the distance from the fire source decreases. The temperature curve of tunnel vault is consistent. Under the same fire source heat release rate, the flue gas temperature decreases with the increase of ventilation wind speed, and the distance between the highest temperature of the ceiling and the fire source decreased with the increase of the longitudinal ventilation wind speed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Case Studies in Thermal Engineering - Volume 12, September 2018, Pages 47-54
Journal: Case Studies in Thermal Engineering - Volume 12, September 2018, Pages 47-54
نویسندگان
Hai jun Tao, Guoqing Zhu, Yu Xia, Yongchang Zhao,