Accession Number : ADA202034


Title :   Numerical Field Model Simulation of Full-Scale Fire Tests in a Closed Spherical/Cylindrical Vessel with Internal Ventilation


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Houck, Richard R.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA202034


Report Date : SEP 1988


Pagination or Media Count : 231


Abstract : Shipboard fires have plagued mariners for centuries; they still cause significant damage and casualties each year. Improved fire prevention and control require a sound knowledge of the phenomena of fire. At the same time, a study of fires in enclosed pressure vessels has been undertaken by the Navy using FIRE-1, a large pressure vessel, to conduct full-scale experimental fires. A computer model is being developed to simulate the FIRE-1 tests. This three- dimensional finite difference model uses a cylindrical/spherical coordinate system and includes the effects of turbulence, surface and flame radiation, internal ventilation, global and local pressure corrections, strong buoyancy, and conjugate boundary conditions. Given a heat release rate, the model computes temperature, pressure, density and velocity fields for the entire vessel. This thesis presents the internal ventilation feature of the model and compares the numerical results to a nonventilated case. Additional features such a combustion and gaseous radiation are being incorporated to more accurately model real fires. When validated, this model will become a useful tool for evaluating fire prevention and control procedures and equipment.


Descriptors :   *MATHEMATICAL MODELS , *SHIP FIRES , *THESES , *COMPUTERIZED SIMULATION , SIMULATION , VELOCITY , GLOBAL , SCALE MODELS , MODELS , VENTILATION , NUMERICAL ANALYSIS , RATES , TEST METHODS , BUOYANCY , TURBULENCE , GASES , BOUNDARIES , THREE DIMENSIONAL , FINITE DIFFERENCE THEORY , COMBUSTION , INTERNAL , PRESSURE , RELEASE , PRESSURE VESSELS , CASUALTIES , FIRES , FLAMES , HEAT , CONTROL , CORRECTIONS , FIRE PREVENTION , RADIATION


Subject Categories : SAFETY ENGINEERING


Distribution Statement : APPROVED FOR PUBLIC RELEASE