Computational fluid dynamics analysis of external recirculation flow at updraft gasifier using ejector

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Abstract

Gasification process at updraft gasifier produces the amount of more tar than the other gasifier type. To reduce tar at updraft gasifier, it is carried out recirculation of pirolysis gas into combustion zone. Ejector is an equipment used to entrain the secondary fluid flow by moving momentum and energy from high velocity of primary flow (jet). Research carries out the simulation of isothermal 3D using Computational Fluid Dynamics (CFD) to obtain the maximum of recirculation flow at updraft gasifier using ejector. The result of simulation shows that change of nozzle diameter gives great influence at change of total flow for resirculation compared with the change of diameter and length of mixing area and nozzle exit position (NXP). The maximum of resirculation flow 81 lpm at nozzle diameter 0.75 cm.

Original languageEnglish
Title of host publication4th International Meeting of Advances in Thermofluids, IMAT 2011
Pages936-941
Number of pages6
DOIs
Publication statusPublished - 1 Dec 2012
Event4th International Meeting of Advances in Thermofluids, IMAT 2011 - Melaka, Malaysia
Duration: 3 Oct 20114 Oct 2011

Publication series

NameAIP Conference Proceedings
Volume1440
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Meeting of Advances in Thermofluids, IMAT 2011
Country/TerritoryMalaysia
CityMelaka
Period3/10/114/10/11

Keywords

  • CFD
  • ejector
  • external recirculation
  • maximum flow
  • updraft gasifier

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