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Study of the Temperature Distribution in a Road Tunnel Under the Effect of Two Ventilation Systems
Tunnel Fire Ventilation FDS Stratified Flow Temperature
2013/3/12
This paper proposes numerical investigations carried out on a small scale tunnel model airing to study the fire-induced smoke control by longitudinal and longitudinal-natural ventilation systems. We s...
Full-Ring Experimental Study of the Lining Structure of Shanghai Changjiang Tunnel
Shield-driven tunnel lining structure full-scale test load apparatus.
2014/4/10
Shanghai Changjiang Tunnel, 15 m in diameter, is one of the world’s largest shield-driven tunnels in diameter. Tongji University has recently carried out a test on the full-scale three-ring lining str...
Digging through the Heart of Reunified Berlin: Unbundling the Decision-Making Process for the Tiergarten-Tunnel Mega-Project
Mega-projects Berlin rail urban restructuring
2010/8/16
The Berlin Tiergarten tunnel project (VZB) consisted of a joint planning approval procedure for one road and several rail tunnels (inter-city, metro rail and city subway). The tunnels lead through the...
Digging through the Heart of Reunified Berlin：Unbundling the Decision-Making Process for the Tiergarten-Tunnel Mega-Project
Mega-projects Berlin rail urban restructuring
2010/3/16
The Berlin Tiergarten tunnel project (VZB) consisted of a joint planning approval procedure for one road and several rail tunnels (inter-city, metro rail and city subway). The tunnels lead through the...
EFFECT OF WALL PROXIMITY IN FLUID FLOW AND HEAT TRANSFER FROM A SQUARE PRISM PLACED INSIDE A WIND TUNNEL
flow separation square prism blockage ratio
2009/10/14
Experimental investigations in fluid flow and heat transfer have been carried out to study the effect of wall proximity due to flow separation around square prisms. Experiments have been carried out f...
Parameters Affecting the Determination of the Tunnel Threshold-Zone Luminance
Threshold-zone luminance Visual ability Duration time Perception probability Safe stopping
2009/10/14
In order to determine the level of the tunnel threshold-zone luminance, as series of visual experiments were conducted using a tunnel entrance simulator. For the experiments 110 observers were used. T...
FIRE SAFETY CASE STUDY OF A RAILWAY TUNNEL: SMOKE EVACUATION
tunnel fire safety smoke control simulation
2009/10/14
When a fire occurs in a tunnel, it is of great importance to assure the safety of the occupants of the tunnel. This is achieved by creating smoke-free spaces in the tunnel through control of the smoke...
Importance of Buoyancy and Chemistry Modelling in Steady RANS Simulations of Well-Ventilated Tunnel Fires
Tunnel fire Critical ventilation velocity Buoyancy modelling Chemistry modelling Steady simulations
2009/10/10
Numerical CFD simulation results are presented for well-ventilated fires in horizontal tunnels. Simulations are performed in the framework of steady Reynolds-Averaged Navier-Stokes modelling. As a tur...
Tunnel-Curvature´s Influence on the Propagation of the Consequences of Large-Scale Accidental Fire - a CFD-Investigation
CFD Large-scale fires RANS k-ε Tunnel-fires
2009/10/9
There is growing evidence for influence of irradiative heat-flux in the large scale confined fires onto the fire growth rate and subsequently there is a need to understand mentioned relationship regar...
果脯隧道式干燥机温湿度监控系统设计与试验（Monitoring and Controlling System of Temperature and Humidity for Tunnel-type Dryer）
隧道式干燥机 果脯 监控 系统设计 组态软件 试验
2010/5/5
设计了果脯隧道式干燥机多段温湿度监控系统。系统以可编程控制器与工控机为控制中心，基于组态软件的二次开发，对隧道式干燥机多段变温变湿干燥过程的温度、湿度和干燥时间进行实时监控和集中管理。运行试验表明，该系统实现了温湿度的参数设置、实时动画显示、趋势曲线、数据库查询、报表输出打印等功能，温度控制精度为2℃，相对湿度控制精度达到8%。 The temperature and humidity monit...
Optical methods used to optimise semiconductor laser structures with tunnel injection from quantum well to InGaAs/GaAs quantum dots
quantum dots optical properties lasers
2011/5/11
We present the results of optical measurements performed on structures consisting of an InGaAs quantum well (QW), separated by a thin barrier from a layer of self-assembled InGaAs quantum dots (QDs). ...
In-Cabin Commuter Exposure to Ultrafine Particles on Commuter Roads in and around Hong Kong’s Tseung Kwan O Tunnel
In-cabin commuter exposure Water-based particle counter Hong Kong Tseung Kwan O Tunnel Roadway measurements Ultrafine particles Nano-particles
2016/3/29
Over half a million cars pass through Hong Kong’s tunnels every day. Commuters, taxi drivers, and other drivers who pass through
these tunnels may be exposed to high levels of particulate matter and ...
Circulation Water Tunnel Tests on Slewing Motion of a Towed Ship in Wind
towed barge Slewing Motion
2009/3/27
This paper describes circulation water tunnel tests for investigating the wind effects on the course stability of a towed barge.
Design of a wind tunnel for separating flower parts of saffron
Technological devices and equipment Aerodynamic properties Wind tunnel
2010/1/19
Purpose: The separation possibility of stigma from the other parts of saffron flower using its aerodynamic
properties was studied and a vertical wind tunnel was designed on the basis of the obtained ...
COMPRESSIVE FAILURE MECHANISM OF DFORMED CONCRETE TUNNEL LININGS DUE TO A VERTICALLY CONCENTRATED LOAD
ground pressure cracking compressive behavior parabolic compressive softening model
2008/12/25
Concrete tunnels subjected to the ground pressure usually show a compressive failure mode. Moreover, due to an unbalanced soil constraint, deformed tunnels under an additional concentrated load will ...