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Design calculation for longitudinal ventilation in extra long tunnel with air ejecting and blowing system(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年05期
Page:
81-85
Research Field:
Publishing date:
2009-10-20

Info

Title:
Design calculation for longitudinal ventilation in extra long tunnel with air ejecting and blowing system
Author(s):
LU Kangcheng1;  WU Yimin1; 2
1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China
Keywords:
tunnel engineering;  extra long highway tunnel;  longitudinal ventilation with air ejecting and blowing system;  design calculation
PACS:
U453.5
DOI:
-
Abstract:
Based on aerodynamics, this paper deduces the new fundamental formulas for calculations the pressure increasing at ejecting and blowing mouths, consistence of CO, required quantity and pressure of air at the controlling crosses of extra long highway tunnel. The special results are in the following aspects: to determine the pressure increasing at the ejecting mouth considering the influence of the angle between the tunnel and ejecting mouths; to construct a new method to determine the quantity of required air by the polluted air; to put forward the necessary and sufficient condition of the amount and pressure at different sectors in extra long tunnel; to build a new analysis model for the ventilation design according the common structure of ejecting and blowing mouth in China. These conclusions can be used in design calculation for extra long tunnel ventilation with air ejecting and blowing system, and in perfection of the related specifications. 3 figs, 10 refs.

References:

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Memo

Memo:
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Last Update: 2009-10-20