BEGIN:VCALENDAR

VERSION:2.0

PRODID:-//wp-events-plugin.com//6.6.4.4//EN

TZID:Asia/Jerusalem

X-WR-TIMEZONE:Asia/Jerusalem
BEGIN:VEVENT

UID:0-385@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20180507T163000

DTEND;TZID=Asia/Jerusalem:20180507T173000

DTSTAMP:20230527T140810Z

URL:https://aerospace.technion.ac.il/events/apparatus-and-experiments-for-
 thermal-conductivity-study-of-ablative-materials/

SUMMARY:Apparatus and Experiments for  Thermal Conductivity Study of  Ablat
 ive Materials
DESCRIPTION:Lecturer:Ramin Shilav\n Faculty:Department of Aerospace Enginee
 ring\n Institute:Technion – Israel Institute of Technology\n Location:Cl
 assroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract:
  \n Details: \n Research on performance of thermal protection systems is s
 ignificant for the development of products for aerospace applications\, su
 ch as internal insulation for solid rocket motors\, nozzles\, and external
  thermal protection insulation. Ablative materials are used as sacrificial
  material against the combination of high temperatures and high heat flux 
 to the protected vessel. The unique chemical and physical characteristics 
 of these materials face successfully the thermo-chemical ablation and mech
 anical erosion of the surface. Variation of thermal conductivity with temp
 erature cannot be predicted\, and there is a need to determine it experime
 ntally. Since most reactions which influence the thermal conductivity of t
 he ablative material occur up to a temperature of 1200K\, it was decided t
 o develop such an apparatus.\nIn the present work\, the development of a t
 hermal conductivity apparatus for research of ablative materials is presen
 ted. Derivation of a semi-empirical model for determining the instantaneou
 s thermal conductivity of the ablative material has been implemented succe
 ssfully. Verification testing of the apparatus was carried out in order to
  determine the accuracy and sensitivity of results. Four compositions of E
 PDM-based insulation in addition to PTFE as a reference material were test
 ed. Results were compared to relevant results from the literature and to a
  well-established apparatus\, revealing good agreement. It was found that 
 it is possible to determining the specific heat as well as the thermal dif
 fusivity of the ablative material\, once the temperature dependent density
  is experimentally determined. The conducted experiments revealed the infl
 uence of the following parameters on the temperature dependent thermal con
 ductivity: Curing agent of the ablative material\, reinforcing fibers and 
 fire retardant agents.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

END:VEVENT

BEGIN:VTIMEZONE

TZID:Asia/Jerusalem

X-LIC-LOCATION:Asia/Jerusalem

BEGIN:DAYLIGHT

DTSTART:20180323T030000

TZOFFSETFROM:+0200

TZOFFSETTO:+0300

TZNAME:IDT

END:DAYLIGHT

END:VTIMEZONE
END:VCALENDAR