Effects of enclosure on the performance of the weak-swirl burner
This paper reports a study of the velocity and scalar characteristics of the weak-swirl burner in enclosures. WSB utilizes a unique aerodynamic mechanism to stabilize lean burning premixed combustion over a wide range of equivalence ratios ({phi}) and power inputs. As the WSB was developed for fundamental research, previous works focused only on open WSBs. Recent success in adapting the WSB to practical use suggests that a better understanding of the WSB in enclosures is required for further development. Laser Doppler anemometry (LDA), and Mie scattering of oil droplets (MSOD), are used to measure the flame flowfields and flame crossing spectra of the WSB with an open flame, enclosed within a quartz cylinder and within a cylinder with a restricted exit. The flame of the enclosed WSB remained extremely stable and did not develop recirculation zones or audible characteristics. The only change observed was a greater divergence of the flowfield upstream of the reaction zone. Neither lengthening the enclosure nor restricting the flow downstream caused any noticeable difference in the operation of the WSB. This work has demonstrated that the WSB should be amenable for adaptation to a wide variety of low NO{sub x} applications.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 135079
- Report Number(s):
- LBL--37900; CONF-9510145--4; ON: DE96002555
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of lean premixed low-swirl burner for low NO{sub x} practical application
Dynamics of the flame flowfields in a low-swirl burner