TY - JOUR AB - 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. VL - 16 IS - 2 SN - 1726-0531 DO - 10.1108/JEDT-07-2017-0070 UR - https://doi.org/10.1108/JEDT-07-2017-0070 AU - Zhou Binghua AU - Xue Yiguo AU - Li Mingtian AU - Li Zhiqiang AU - Zhang Xueliang AU - Tao Yufan PY - 2018 Y1 - 2018/01/01 TI - Longitudinal jet ventilation calculation and application of long highway tunnel T2 - Journal of Engineering, Design and Technology PB - Emerald Publishing Limited SP - 256 EP - 269 Y2 - 2024/03/28 ER -