Hydraulic Modelling of Ventilation Patterns

35-Year-Old Foundations, Thule Air Base, Greenland
In February 1951 the secret project 'Blue Jay' to construct the base began. Timber piling were used in the foundations of boilers, generators, and other heavy...

Building Assessment Techniques for Indoor Air Quality Evaluations
Techniques for indoor air quality evaluations are presented and discussed. The techniques presented first focus on procedures to determine effective ventilation rates and pathways of air...

Progress Report of the Task Committee on Radiation in Engineering

Effect of Outdoor Parameters on Indoor Air Quality

Indoor Aldehyde Levels in Nonoccupational Environments of a Midwestern Town

Tokyo's Dainikoro Underwater Tube-Tunnel
The Tokyokou Dainikoro Tube-Tunnel is a four-lane highway tunnel which, when completed in 1980, will provide direct access to manmade islands in the Bay. The estimated cost is about 30...

Vented Hydroturbine Aeration and Power Foregone

Preventing the Underground Movement of Methane from Sanitary Landfills
Alternatives for controlling methane gas migration from sanitary landfills are evaluated. The conditions leading to explosions and fires from concentrations of methane are discussed. Advantages...

Tunnel and Shaft Sealing Methods Using Polyvinyl Chloride Sheet
This report decribes a newly developed sealing method for tunnels and shafts showing many advantages, such as the possibility of sealing on a wet and rough surface and the tight fixation...

Removal of Air from Water Lines by Hydraulic Means
Air is introduced into water transmission lines through vortices at intakes, pumps, vents, and other causes. This results in loss of capacity, surges and blow backs, difficulties in filtering...

Ventilated Approach Regions for Railway Tunnels
A possible method of reducing the magnitudes of the pressure transients generated when railway trains enter tunnels at high speeds is described. Some such method will be required in the...

Washington, D.C. Mall Tunnel
The 4,002 ft (1220 m) cut and cover tunnel crossing the Mall just west of the U.S. Capitol created some unusual construction and design problems. Three areas warrant special mention. These...

Tunnel under Alps Uses New, Cost-Saving Lining Method
Contractors of the Tauerntunnel through the Alps, near Salzburg, Austria, encountered very bad geology — heavily distorted, preloaded rock under an overburden up to 3,300 ft (1,000-m)...

Design Optimization for Biological Filter Models
Four different models are used: the Eckenfelder, the Galler-Gotaas, the National Research Council (NRC), and the Upper Mississippi and Great Lakes Board. Filter depth has the greatest...

Computer Simulation of Subway Environment
A designer-oriented computer program, designated the Single-Track Subway Environment Simulation model, has been developed to simulate multiple train operation in a single-train subway...

Hydraulically Ventilated Underground Filter
A model filter was dosed intermittently at four rates with a soluble carbon-limited feed water. It was found that aerobic conditions could be maintained at organic and hydraulic sidewall...

Surging in Laboratory Pipeline with Steady Inflow
Surges of head and discharge were studied experimentally in a laboratory pipeline which had check structures spaced at equal distances along the pipe. Surges developed when the downstream...

Drainage Characteristics of Digested Sludge
The synthesis of an optimal design for a sludge drying bed will depend on the creativeness of the designer and, in part, on the availability of sufficient information on the several dewatering...

Irrotational Flow Over Spillways of Finite Height
Potential theory is used to analyze free-surface, irrotational flow over spillways of finite height. Numerical values were obtained for free-surface coordinates, pressures on the surface...

 

 

 

 

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