Junlin He
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Junlin He has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
- Fujun Niu
School of Environment and Geographic Sciences, Shanghai Normal University, Shanghai, China
1 shared publication - Haiqiang Jiang
School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
1 shared publication - Li Cheng
School of Marine Science and Engineering, South China University of Technology, Guangzhou 510640, China
1 shared publication - Wangtao Jiang
School of Civil and Environmental Engineering, Changsha University of Science and Technology, Changsha, China
1 shared publication - Yongdong Li
State Key Laboratory of Subtropical Building Science, South China Institution of Geotechnical Engineering, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China
1 shared publication
Latest Publications
- 5 April 2022
- Published by ASME International in Journal of Thermal Science and Engineering Applications
- Vol. 14 (9)
Numerical Studies for the Thermal Regime of a High-Speed Railway Tunnel Considering Piston Action on Seasonally Frozen Regions
Piston action describes the phenomenon that air at the train nose is pushed forward by the increased pressure and air at the train rear is drawn forward by the decreased pressure when a train passes through a tunnel. The variation of pressure changes the thermal environment inside the tunnel and promotes the frost damage generation in cold season. In this paper, a fluid-thermal-solid involving piston action is proposed. A high-speed railway tunnel that is located in the northeast of China is set in the background, and the influence of outside air temperature and train velocity on the thermal environment inside the tunnel are simulated and analyzed. The piston action can significantly change the temperature inside the tunnel, especially at the ends of tunnel. The temperature distribution is characterized by three zones, including disturbed zones at two sides of tunnel and undisturbed zone at tunnel middle. The freezing length is closely related to air temperature and train velocity. And also, the lengths are different at vault and rail of tunnel portal, which indicates that the anti-freezing measure should be different at these positions considering the cost. This paper can help us understand the temperature evolution process of tunnels under the action of piston wind and provide some guidelines for structural design of cold regional tunnels.
- 5 April 2022
- Published by ASME International in Journal of Thermal Science and Engineering Applications
- Vol. 14 (9)
Numerical Studies for the Thermal Regime of a High-Speed Railway Tunnel Considering Piston Action on Seasonally Frozen Regions
Piston action describes the phenomenon that air at the train nose is pushed forward by the increased pressure and air at the train rear is drawn forward by the decreased pressure when a train passes through a tunnel. The variation of pressure changes the thermal environment inside the tunnel and promotes the frost damage generation in cold season. In this paper, a fluid-thermal-solid involving piston action is proposed. A high-speed railway tunnel that is located in the northeast of China is set in the background, and the influence of outside air temperature and train velocity on the thermal environment inside the tunnel are simulated and analyzed. The piston action can significantly change the temperature inside the tunnel, especially at the ends of tunnel. The temperature distribution is characterized by three zones, including disturbed zones at two sides of tunnel and undisturbed zone at tunnel middle. The freezing length is closely related to air temperature and train velocity. And also, the lengths are different at vault and rail of tunnel portal, which indicates that the anti-freezing measure should be different at these positions considering the cost. This paper can help us understand the temperature evolution process of tunnels under the action of piston wind and provide some guidelines for structural design of cold regional tunnels.