Development of an Active Grid Adapted to a Low-Swirl Burner and Measurements of Turbulent Properties of the Flow FieldReport as inadecuate




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* Corresponding author 1 JAXA - Japan Aerospace Exploration Agency Tokyo 2 EM2C - Laboratoire d-Énergétique Moléculaire et Macroscopique, Combustion

Abstract : The aim of this research is to design a bi-plane active grid to enhance turbulent flow downstream of a low- swirl burner. The active grid is a variation of the original form devised by Makita in 1991. First, adequate ranges for experimental parameters are sought using non-reacting flow. While turbulent intensity is of major interest, homogeneity, isotropy, and integral scale near the nozzle exit are also analyzed by measuring mean and turbu- lent velocities. In addition, a fully developed inertial subrange is demonstrated by energy spectra analysis. When premixed reacting flow is tested, a turbulent Karlovitz number higher than unity is achieved under vari- ous conditions. It indicates that the flame produced is in the thin reaction zone regime on the Peters- diagram. The measurements are implemented using both hot-wire anemometry and particle image velocimetry.





Author: Inkyu Jeon - Shigeru Tachibana - Laurent Zimmer - Akira Nishizawa -

Source: https://hal.archives-ouvertes.fr/



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