Final Scientific/Technical Report

Chang, Yale¹  Thomas, Michael E.¹  Siegrist, Karen M.² 

[1]Johns Hopkins University, Laurel, MD (United States). Applied Physics Laboratory

[2]Johns Hopkins University, Laurel, MD

关键词: Solid propellant fire characterization;    materials forensics;    optics measurements;    environmental specification;    test and evaluation;    substrates concrete steel ablative;    particle size distribution;    surrogates;    thermochemistry analysis;    Doppler lidar;    micro pulse lidar;    plume rise;    pyrometry;    GPU;    microbolometer;   

DOI  :  10.2172/1159228
RP-ID  :  DOE-JHUAPL--00466-1 & 2
PID  :  OSTI ID: 1159228

美国|英语

来源: SciTech Connect

【 摘 要 】

JHU/APL conducted solid propellant fire characterization tests in warm, humid, ambient conditions near sea level. Yttria and ceria surrogate materials were placed in the fires. The substrates simulating ground surfaces were concrete from a Kennedy Space Center launch pad, and steel covered with a protective ablative material representing a launch platform. In-situ instrumentation consisted of witness materials, thermocouples, air handlers, filters, and cascade impactors; remote instrumentation consisted of optical cameras and spectrometers. Test and analysis team members included the Naval Air Warfare Center Aircraft Division, Sandia National Laboratories (SNL), Alliant Techsystems, and the Johns Hopkins University. Test data were analyzed, reported, and delivered, including plume rise and transport captured on video. Derivation of the alumina particle size distributions formed the basis for condensing vapor and agglomeration estimates. Assessment of alumina mass in the plume, along with the surrogate fraction from filter forensics, provided an estimate of airborne surrogate mass. Technical interchange meetings were held with SNL and the Jet Propulsion Laboratory. Specifications for the fire environment were developed and delivered. A thermochemistry model that simultaneously provides the maximum temperature and heat flux was developed and delivered. An SPIE paper on 3D pyrometry of the fire was written and presented.