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UID:0-341@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20190703T163000

DTEND;TZID=Asia/Jerusalem:20190703T173000

DTSTAMP:20230527T134855Z

URL:https://aerospace.technion.ac.il/events/ignition-characteristics-of-pl
 asma-reformed-n-heptane-in-a-homogeneous-charge-compression-ignition-engin
 e-a-modeling-study/

SUMMARY:The 2019 Timnat Prize Seminar - Ignition Characteristics of Plasma 
 Reformed N-Heptane in a Homogeneous Charge Compression Ignition Engine: A 
 Modeling Study
DESCRIPTION:Lecturer:Galia Faingold\n Faculty:Department of Aerospace Engin
 eering\n Institute:Technion – Israel Institute of Technology\n Location:
 Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstrac
 t: \n Details: \n Combustion processes can be greatly improved using react
 ive species created in non-equilibrium plasma for the initiation of fuel o
 xidation and pyrolysis. One such process is volumetric ignition\, inherent
  to homogeneous charge compression ignition (HCCI) engines. The HCCI engin
 e has high efficiency and low emissions of both nitrous oxide (NO) and car
 bon monoxide (CO)\, and does not produce soot particles. However\, HCCI te
 chnology is currently limited by control difficulties and has a narrow ope
 rating range when compared to the traditional compression ignition or spar
 k ignition engines.\nThe present study seeks to control ignition timing by
  reforming a fuel-air mixture in a plasma discharge. A small charge of n-h
 eptane/air mixture is subjected to a plasma discharge and then mixed with 
 a main charge in order to modify ignition characteristics. The effects of 
 the reformed charge on ignition timing are investigated using zero-dimensi
 onal time dependent models. Plasma reaction calculations employ an open-so
 urce zero-dimensional discharge solver ZDPlaskin\, incorporating BOLSIG+ t
 o obtain electron transport coefficient and for pre-processing the plasma 
 chemistry mechanism\, including rates of electron collision reactions. Ign
 ition delay of fuel-air mixture with species created in the discharge is c
 alculated using Cantera.\nIgnition delay was shortened significantly using
  a small amount of reformed fuel\, especially at low temperatures of 600 t
 o 800K. At higher temperatures\, the change is less pronounced\; however\,
  there is a decrease in ignition delay with the increase in activated spec
 ies molar mass. The results show potential as a method to control ignition
  timing in advanced engine technologies.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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DTSTART:20190329T030000

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