Ventilation systems analysis during tornado conditions. Progress report, January--June 1975

Technical Report · Sat Nov 01 00:00:00 EST 1975

DOI:https://doi.org/10.2172/4134378· OSTI ID:4134378

Bennett, G A; Gregory, W S; Smith, P R

The principal concern of this investigation is to develop the capability to simulate the dynamic effects of a tornado depressurization on a ventilation system. The basic formulation and solution of the two-zone series model ventilation subsystem is based on lumped parameter component response equations, the isothermal compression of air, and the conservation of mass. Solutions based on these assumptions are also presented for the two-zone series model with natural bypass, the two-zone series model with recirculation, and the natural branching model. A parameter study is presented comparing the effects of changes in system resistance, system capacitance, and variable tornado depressurization rates. The adaptability of the basic formulation to adiabatic compression of air and the addition of duct resistance is examined. A quasi-steady formulation is introduced and preliminary considerations of the importance of inertia are presented. Preliminary conclusions in this area indicate that inertial effects can be neglected. For relatively long ducts slow shock development appears possible. Work on the effect of tornado depressurization rates as related to shock development and on the importance of inertia effects is continuing. (auth)

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• NSA Number: NSA-33-009242
• OSTI ID: 4134378
• Report Number(s): LA-6120-PR
• Resource Relation: Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N42700* -Engineering-Safety Engineering
N40450 - Chemistry-Radiochemistry & Nuclear Chemistry-Reactor Fuel Processing
420600* -Engineering-Safety Engineering
*AIR CLEANING SYSTEMS- SAFETY
*FUEL FABRICATION PLANTS- AIR CLEANING SYSTEMS
*FUEL REPROCESSING PLANTS- AIR CLEANING SYSTEMS
CONTAINMENT
DEPRESSURIZATION
DUCTS
EARTH ATMOSPHERE
HAZARDS
OPERATION
RADIATION PROTECTION
SHOCK WAVES
TORNADOES
VENTILATION