Simulations Study of Thermal Flow Structure in an Innovative Burner with Cap-induced Premixing Combustion
Date Issued
2010
Date
2010
Author(s)
Zhang, Shu-Kai
Abstract
This study focuses on numerical simulation for bluff body burner with Fluent6.2, We compare numerical results with the experimental ones by disk bluff body and cap bluff body. The annulus air jet velocity is fixed and the central fuel jet velocity is changed, the flame structure is classified into three stable modes: recirculation zone flame, jet-dominated flame and jet-like flame. We compare recirculation zone by cold reacting flow and combusting flow, and observed the CH and OH mole fraction distribution. Followings are the purpose to use cap bluff body: first, we make fuel and air to be premixed in the cap bluff body. Then, recirculation zone let the mixed gas be secondly mixed, as the mixed gas drift out from the cap bluff body. This can make the mixing process better and improve combustion efficiency.
Subjects
disk bluff body
cap bluff body
recirculation zone
Type
thesis
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