Details

Autor(en) / Beteiligte

• TAGAWA, Masato
• MATSUBARA, Fumiyuki
• SUGITA, Kazuhiko
• OHTA, Yasuhiko

Titel

Heat Transport Characteristics of a Non-Premixed Turbulent Flame Formed in a Curved Rectangular Duct

Ist Teil von

• Transactions of the Japan Society of Mechanical Engineers Series B, 2001/11/25, Vol.67(663), pp.2856-2863

Ort / Verlag

The Japan Society of Mechanical Engineers

Erscheinungsjahr

2001

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Heat transport characteristics of a non-premixed turbulent flame formed in a curved rectangular duct (180° bend) are investigated experimentally. Key turbulence quantities of velocity and thermal fields such as Reynolds stress components and turbulent heat fluxes are measured using a combined LDV and fine-wire thermocouple technique. These measurements show direct evidence of the occurrence of counter-gradient heat transport, which can be ascribed to the existence of a strong pressure gradient in the radial direction of the curved duct. The schlieren photography for visualizing the density field reveals totally different behavior of the burned gas parcels between the high- and the low-pressure sides of the flow, and the observations may help us explain the mechanism of the occurrence of the counter-gradient heat transport in turbulent flows with combustion.