Modeling Thermal Environments in Large Blast/Thermal Simulator (LB/TS).

The work reported herein was conducted in support of the use of aluminum-liquid oxygen LOX thermal radiation simulators TRS in the planned large blastthermal simulator LBTS. The type of TRS is the so-called flame or torch TRS. The tasks performed during this work consisted of the following activities 1 the TRS predictor models were extended to account for different burn rates, 2 conditions unique to the LBTS were considered from a modeling viewpoint, 3 four camera systems were used to characterize the spectral and temperature variations of a four nozzle TRS, 4 calorimeter baffles were designed, constructed, and used to obtain source-resolved irradiance data. Relationships to scale TRS output to fuel flow rate were hypothesized and compared to available data. The results are encouraging but inconclusive. With the existence of source-resolved irradiance data, an improvement was made to the TRS predictor models this improvement has applicability to TRS use in predicting free field environments. The photographic and spectral measurement made in the visible were useful to understanding the TRS flame structure. The baffled calorimeter experiments yielded data directly usable to improve models.