Prediction of central recirculation zone size for a complete burner-quarl-furnace system
In the swirl flow burning process of fuels, the central recirculation zone plays an important role in flame stabilization by providing a hot flow of recirculated combustion products, which reduce both the length of flame and the stabilized flame distance from the burner mouth. In this paper, a new modified swirl number, S exp xx, related to the characteristic size of the burner quarl, is introduced to correlate the isothermal and burning flows. Using a well-known two-dimensional computational model, the isothermal flow pattern in a complete burner-quarl-furnace system is computed. On this basis, the theoretical swirl number S exp xx is calculated and used as a correlation parameter for predicting the central recirculation zone size in burning flow conditions. Experimental tests for both nonreacting and reacting flows on the same complete burner-quarl-furnace system, for comparing the theoretical and experimental swirl number s exp xx, have been conducted, and the validity of this new correlation parameter has been proved. 11 references.
- Research Organization:
- Institute of Scientific Research and Engineering for Power Equipment, Bucharest, Rumania
- OSTI ID:
- 6759770
- Journal Information:
- AIAA J.; (United States), Journal Name: AIAA J.; (United States) Journal Issue: 3 Vol. 25; ISSN AIAJA
- Country of Publication:
- United States
- Language:
- English
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