Flame stability of a micro can-type afterburner for a SOFC

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper is fundamental studies on an afterburner for a 20kW class home cogeneration solid oxide fuel cell (SOFC) hybrid system. The proposed burner is a micro size can-type with a baffle plate having multi air holes set annularly and an opposite arranged single fuel and air nozzle in the center. This geometry is suitable to enhance the fuel and air mixing and to stabilize the flame in the ultra lean fuel of the effluent from SOFC stack in the MGT. The blow off limits and flame shape are discussed with the flow structure behind the baffle plate which measured by using a particle image velocimetry (PIV). The formed flames can be classified into four groups which are a premixed flame, a partially premixed flame, a partially nonpremixed flame, and a nonpremixed flame depend on the pilot air jet velocity, the baffle plate holes air jets velocity, and the clearance of the fuel nozzle exit and baffle plate, even when the flow rate of the fuel is same. When the premixed flame formed side by the fuel nozzle, the fuel is preheated approximaiely 750K. The counter-rotating vortices are formed behind the baffle plate and the vortices play a key role for the fuel and air mixing as well as the flame stabilization. The pilot jet not only controlled the flame position but also enhanced the fuel and air mixing. Especially, the pilot jet is important to form the premixed flame near the blow off conditions, and the desirable velocity is close to the air jets velocity of the baffle plate holes. However, there are some ineffective conditions for the pilot air jet.

Original languageEnglish
Title of host publicationASME International Mechanical Engineering Congress and Exposition, Proceedings
Pages355-360
Number of pages6
Volume3
DOIs
Publication statusPublished - 2009
Event2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA
Duration: 2008 Oct 312008 Nov 6

Other

Other2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
CityBoston, MA
Period08/10/3108/11/6

Fingerprint

Solid oxide fuel cells (SOFC)
Air
Nozzles
Vortex flow
Flow structure
Hybrid systems
Fuel burners
Velocity measurement
Effluents
Stabilization
Flow rate
Geometry

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Yahagi, Y. (2009). Flame stability of a micro can-type afterburner for a SOFC. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (Vol. 3, pp. 355-360) https://doi.org/10.1115/IMECE2008-67171

Flame stability of a micro can-type afterburner for a SOFC. / Yahagi, Yuji.

ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 3 2009. p. 355-360.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yahagi, Y 2009, Flame stability of a micro can-type afterburner for a SOFC. in ASME International Mechanical Engineering Congress and Exposition, Proceedings. vol. 3, pp. 355-360, 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008, Boston, MA, 08/10/31. https://doi.org/10.1115/IMECE2008-67171
Yahagi Y. Flame stability of a micro can-type afterburner for a SOFC. In ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 3. 2009. p. 355-360 https://doi.org/10.1115/IMECE2008-67171
Yahagi, Yuji. / Flame stability of a micro can-type afterburner for a SOFC. ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 3 2009. pp. 355-360
@inproceedings{a3156fc283694cd0832fd2539379b31b,
title = "Flame stability of a micro can-type afterburner for a SOFC",
abstract = "This paper is fundamental studies on an afterburner for a 20kW class home cogeneration solid oxide fuel cell (SOFC) hybrid system. The proposed burner is a micro size can-type with a baffle plate having multi air holes set annularly and an opposite arranged single fuel and air nozzle in the center. This geometry is suitable to enhance the fuel and air mixing and to stabilize the flame in the ultra lean fuel of the effluent from SOFC stack in the MGT. The blow off limits and flame shape are discussed with the flow structure behind the baffle plate which measured by using a particle image velocimetry (PIV). The formed flames can be classified into four groups which are a premixed flame, a partially premixed flame, a partially nonpremixed flame, and a nonpremixed flame depend on the pilot air jet velocity, the baffle plate holes air jets velocity, and the clearance of the fuel nozzle exit and baffle plate, even when the flow rate of the fuel is same. When the premixed flame formed side by the fuel nozzle, the fuel is preheated approximaiely 750K. The counter-rotating vortices are formed behind the baffle plate and the vortices play a key role for the fuel and air mixing as well as the flame stabilization. The pilot jet not only controlled the flame position but also enhanced the fuel and air mixing. Especially, the pilot jet is important to form the premixed flame near the blow off conditions, and the desirable velocity is close to the air jets velocity of the baffle plate holes. However, there are some ineffective conditions for the pilot air jet.",
author = "Yuji Yahagi",
year = "2009",
doi = "10.1115/IMECE2008-67171",
language = "English",
isbn = "9780791848647",
volume = "3",
pages = "355--360",
booktitle = "ASME International Mechanical Engineering Congress and Exposition, Proceedings",

}

TY - GEN

T1 - Flame stability of a micro can-type afterburner for a SOFC

AU - Yahagi, Yuji

PY - 2009

Y1 - 2009

N2 - This paper is fundamental studies on an afterburner for a 20kW class home cogeneration solid oxide fuel cell (SOFC) hybrid system. The proposed burner is a micro size can-type with a baffle plate having multi air holes set annularly and an opposite arranged single fuel and air nozzle in the center. This geometry is suitable to enhance the fuel and air mixing and to stabilize the flame in the ultra lean fuel of the effluent from SOFC stack in the MGT. The blow off limits and flame shape are discussed with the flow structure behind the baffle plate which measured by using a particle image velocimetry (PIV). The formed flames can be classified into four groups which are a premixed flame, a partially premixed flame, a partially nonpremixed flame, and a nonpremixed flame depend on the pilot air jet velocity, the baffle plate holes air jets velocity, and the clearance of the fuel nozzle exit and baffle plate, even when the flow rate of the fuel is same. When the premixed flame formed side by the fuel nozzle, the fuel is preheated approximaiely 750K. The counter-rotating vortices are formed behind the baffle plate and the vortices play a key role for the fuel and air mixing as well as the flame stabilization. The pilot jet not only controlled the flame position but also enhanced the fuel and air mixing. Especially, the pilot jet is important to form the premixed flame near the blow off conditions, and the desirable velocity is close to the air jets velocity of the baffle plate holes. However, there are some ineffective conditions for the pilot air jet.

AB - This paper is fundamental studies on an afterburner for a 20kW class home cogeneration solid oxide fuel cell (SOFC) hybrid system. The proposed burner is a micro size can-type with a baffle plate having multi air holes set annularly and an opposite arranged single fuel and air nozzle in the center. This geometry is suitable to enhance the fuel and air mixing and to stabilize the flame in the ultra lean fuel of the effluent from SOFC stack in the MGT. The blow off limits and flame shape are discussed with the flow structure behind the baffle plate which measured by using a particle image velocimetry (PIV). The formed flames can be classified into four groups which are a premixed flame, a partially premixed flame, a partially nonpremixed flame, and a nonpremixed flame depend on the pilot air jet velocity, the baffle plate holes air jets velocity, and the clearance of the fuel nozzle exit and baffle plate, even when the flow rate of the fuel is same. When the premixed flame formed side by the fuel nozzle, the fuel is preheated approximaiely 750K. The counter-rotating vortices are formed behind the baffle plate and the vortices play a key role for the fuel and air mixing as well as the flame stabilization. The pilot jet not only controlled the flame position but also enhanced the fuel and air mixing. Especially, the pilot jet is important to form the premixed flame near the blow off conditions, and the desirable velocity is close to the air jets velocity of the baffle plate holes. However, there are some ineffective conditions for the pilot air jet.

UR - http://www.scopus.com/inward/record.url?scp=70149092509&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70149092509&partnerID=8YFLogxK

U2 - 10.1115/IMECE2008-67171

DO - 10.1115/IMECE2008-67171

M3 - Conference contribution

AN - SCOPUS:70149092509

SN - 9780791848647

VL - 3

SP - 355

EP - 360

BT - ASME International Mechanical Engineering Congress and Exposition, Proceedings

ER -