Near nozzle flow field in flickering n-butane diffusion jet flames was investigated with a special focus on transient flow patterns of negative buoyance induced vortices. The flow structures were obtained through Mie scattering imaging with seed particles in a fuel stream using continuous-wave (CW) Argon-ion laser. Velocity fields were also quantified with particle mage velocimetry (PIV) system having kHz repetition rate. The results showed that the dynamic motion of negative buoyance induced vortices near the nozzle exit was coupled strongly with a flame flickering instability. Typically during the flame flickering, the negative buoyant vortices oscillated at the flickering frequency. The vortices were distorted by the flickering motion and exhibited complicated transient vortical patterns, such as tilting and stretching. Numerical simulations were also implemented based on an open source C++ package, LaminarSMOKE, for further validations.
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ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5721-2
PROCEEDINGS PAPER
Numerical and Experimental Study on Negative Buoyance Induced Vortices in N-Butane Jet Flames Available to Purchase
Suk Ho Chung
Suk Ho Chung
KAUST, Thuwal, Saudi Arabia
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Yuan Xiong
KAUST, Thuwal, Saudi Arabia
Min Suk Cha
KAUST, Thuwal, Saudi Arabia
Suk Ho Chung
KAUST, Thuwal, Saudi Arabia
Paper No:
AJKFluids2015-15294, V001T15A005; 5 pages
Published Online:
November 20, 2015
Citation
Xiong, Y, Suk Cha, M, & Ho Chung, S. "Numerical and Experimental Study on Negative Buoyance Induced Vortices in N-Butane Jet Flames." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 1: Symposia. Seoul, South Korea. July 26–31, 2015. V001T15A005. ASME. https://doi.org/10.1115/AJKFluids2015-15294
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