Zhou, B; Xue, Y; Li, M; Li, Z; Zhang, X and Tao, Y (2018) Longitudinal jet ventilation calculation and application of long highway tunnel. Journal of Engineering, Design and Technology, 16(2), pp. 256-269. ISSN 1726-0531
Abstract
Purpose: When a vehicle passes through a long highway tunnel, the smoke it discharges accumulates in the tunnel. High smoke concentration has an important influence on the driver’s health and driving safety. The use of numerous jet fans to diffuse the smoke causes excessive energy consumption, so it is of significant practical value to design suitable tunnel ventilation. Design/methodology/approach: The study is based on the continuum hypothesis, incompressible hypothesis, steady flow hypothesis and similar hypothesis of gas in a long highway tunnel. These hypotheses calculate the gas emissions and wind demand in a long highway tunnel given the deployment of the jet fan program. Findings: This program selects each of the two 1120-type jet machine group and sets up 13 groups; each group has an interval of 184.5 m in the end. The analysis of air test results when the tunnel is in operation shows that CO and smoke concentrations meet the design requirements, which can provide reference for a similar engineering design later. Originality/value: At present, a highway tunnel is recognized at home and abroad by means of clearance of longitudinal ventilation, which is 2,000 m. In view of this, this paper is based on the theory of longitudinal jet ventilation of a highway tunnel, whose length is more than 2,000 m, to calculate the ventilation and apply it to a tunnel’s ventilation design.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | aerodynamics; jet fan; longitudinal jet; tunnel ventilation; wind |
| Index terms: | program, methodology, tunnel, gas emission, ventilation, energy consumption, aerodynamic, air quality, engineering design |
| Subjects: | energy systems, air quality, environmental health, infrastructure and transport systems, software systems, research methods, factor and component analysis, design process |
| Topics: | Digital Applications, Design Practice, Engineering Principles, Research Practice, Sustainability |
| Descriptive scope: | 3 PCT |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here