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UID:0-420@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20171101T163000

DTEND;TZID=Asia/Jerusalem:20171101T173000

DTSTAMP:20230530T180339Z

URL:https://aerospace.technion.ac.il/events/experimental-investigation-of-
 the-hydrogen-peroxide-solid-hydrocarbon-hypergolic-ignition/

SUMMARY:The Timnat Prize Seminar - Experimental Investigation of the Hydrog
 en Peroxide – Solid Hydrocarbon Hypergolic Ignition
DESCRIPTION:Lecturer:David Andres Castaneda\n Faculty:Department of Aerospa
 ce Engineering\n Institute:Technion – Israel Institute of Technology\n L
 ocation:Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n
  Abstract: \n Details: \n The research examines the idea of using hypergol
 ic ignition in a hybrid motor. The main advantages of the hybrid motor are
  the facts that it is simple\, controllable and exhibits shut-off and re-i
 gnition capability. The ignition delay between the fuel and the oxidizer h
 as to be minimal and provide the adequate heat release to assure combustio
 n.\nHydrogen peroxide is considered as an excellent oxidizer in hybrid sys
 tems. Wernimont and Heister investigated the performance of a hybrid rocke
 t motor that used hydrogen peroxide and polyethylene. Ignition was achieve
 d by using a catalytic bed\, which decomposed hydrogen peroxide and allowe
 d the fuel to burn with the oxidizer. However\, the introduction of a cata
 lytic bed increases weight and affects the performance of the motor.\nThe 
 ignition of the solid hydrocarbon fuel (HTPB or PE) in a hybrid system can
  be accomplished by utilizing a hypergolic combination of oxidizer and fue
 l. For an efficient hybrid system\, the ignition of the fuel grain has to 
 be fast and effective\, i.e.\, to obtain low ignition delay and high heat 
 release. High performance materials and direct hypergolic ignition between
  the solid fuel and the oxidizer seems to be a suitable solution for the m
 entioned above. Research has been conducted on the ignition delay obtained
  from the hypergolic ignition of gelled kerosene with suspended catalyst/r
 eactive particles as done by Natan et al\, showing that the addition of ca
 talyst in a gelled inert fuel can allow efficient hypergolic ignition.\nTh
 at same idea can be implemented in a hybrid motor in which the catalyst is
  embedded in the solid fuel to allow ignition upon contact with the hydrog
 en peroxide. Within the frame of the present work the ignition delay and f
 easibility of a hypergolic ignition between a liquid oxidizer and a solid 
 hydrocarbon fuel was investigated. Various catalysts and fuel types at dif
 ferent conditions have been studied. The effects of the concentration of t
 he catalyst in the fuel\, the fuel temperature and the ambient pressure on
  the ignition delay were investigated.\nThis was done by conducting drop-o
 n-solid tests in a combustion bomb in which the ignition delay was measure
 d using a high-speed camera.\nThe results indicate that this solution can 
 be implemented to obtain a hybrid hypergolic igniter.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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