Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2014008148
pages 169-191

DETERMINATION OF TOTAL SURFACE HEAT FLUX TO ABLATIVE INTERNAL INSULATORS IN SOLID ROCKET MOTORS VIA INVERSE HEAT CONDUCTION ANALYSIS

Heath T. Martin
The Pennsylvania State University, University Park, Pennsylvania, USA; The National Aeronautics and Space Administration, Marshall Space Flight Center, Huntsville, Alabama, USA
Ryan W. Houim
The Pennsylvania State University, University Park, PA 16802, USA
Matthew J. Degges
The Pennsylvania State University, University Park, Pennsylvania 16802, USA
Baoqi Zhang
Department of Mechanical and Nuclear Engineering The Pennsylvania State University, University Park, PA 16802 USA
Kenneth K. Kuo
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA

ABSTRAKT

In assessing the performance of ablative internal insulators in solid rocket motors (SRMs), it is useful to measure the total surface heat flux incident on the insulators. The simplicity of this proposition, however, belies the challenges involved in performing such a measurement. Any device installed in an SRM is subjected to both high temperatures and heating rates; therefore, one challenge is the selection of a gauge material that can not only survive this environment intact, but also deliver accurate and reliable measurements while exposed to these harsh conditions. A second, and more problematic, difficulty is that of introducing the gauge into the SRM environment in a manner that is minimally invasive and will yield results that are an accurate representation of that environment. In this study, a total heat flux gauge using graphite as the sensor material was designed, fabricated, and tested. Multiple micro-thermocouples were embedded at different depths in the graphite sensor, and their recorded temperature histories were utilized in an inverse heat conduction analysis to deduce the total heat flux to and instantaneous temperature of the sensor surface. The gauge was employed in six subscale SRM firings performed for a study of ablative internal insulation. This heat-flux measurement technique proved to be both robust, producing useful results for 9 of 11 total installations, and accurate, with total uncertainty as calculated from quantifiable elemental uncertainties being no greater than 7% of the deduced flux.


Articles with similar content:

ASSESSMENT OF THE PERFORMANCE OF ABLATIVE INSULATORS UNDER REALISTIC SOLID ROCKET MOTOR OPERATING CONDITIONS
International Journal of Energetic Materials and Chemical Propulsion, Vol.16, 2017, issue 1
Kenneth K. Kuo, Heath T. Martin, Andrew C. Cortopassi
INCORPORATING ENERGETIC CHAIN EXTENDERS TO POLYMERIC BINDERS FOR SOLID PROPELLANTS
International Journal of Energetic Materials and Chemical Propulsion, Vol.19, 2020, issue 4
Patrick Caton, Ben Alford, Miles Whitlow, Lawson Stancil, Craig Whitaker, Kendell Graser
FEASIBILITY STUDY FOR MEASURING VAPOR CHAMBER THERMAL DIFFUSIVITY BASED ON THE ANGSTROM METHOD
Heat Pipe Science and Technology, An International Journal, Vol.4, 2013, issue 1-2
Chen-I Chao, Wei-Keng Lin, Pei-Yu Yu, Han-Chou Yao
ANNULAR THERMAL-WAVE DIFFUSING MEASUREMENT METHOD FOR LOCAL THERMAL DIFFUSIVITY EVALUATION
Heat Transfer Research, Vol.47, 2016, issue 1
Feifan Chen, Boyu Zheng, Huilong Dong
FLUID THERMAL DIFFUSIVITY DETERMINATION BY A PULSE TRANSIENT TEMPERATURE TECHNIQUE
International Heat Transfer Conference 4, Vol.36, 1970, issue
Frank Goldner, Neil E. Todreas, Lewis Battist