Numerical simulation of finite disturbances interacting with laminar premixed flames. Issue 4 (4th July 2018)

• Record Type: Journal Article
• Authors: Aslani, Mohamad; Regele, Jonathan D.
• Is Part Of: Combustion theory and modelling. Volume 22:Issue 4(2018)
• Page Start: 812
• Page End: 833
• Publication Date: 2018-07-04
• Subjects: finite disturbances -- laminar premixed combustion -- perturbed flame -- Richtmyer–Meshkov -- wavelet collocation method; Combustion -- Mathematical models -- Periodicals; 541.361
• DOI: 10.1080/13647830.2018.1457800
• Languages: English
• ISSNs: 1364-7830

Abstract

Abstract : Compression waves can be generated during combustion processes and subsequently interact with flames to augment their behaviour. The study of these interactions thus far has been limited to shock and expansion waves only. In this study, the interaction of finite compression waves with a perturbed laminar flame is investigated using numerical simulations of the compressible Navier–Stokes equations with single-step chemical kinetics. The interaction is characterised using three independent parameters: the compression wavelength, the pressure ratio of the disturbance, and the perturbation amplitude of the flame interface. The results reveal a wide range of behaviours in terms of flame length and heat release rate that could occur during such an interaction. The results are compared to the classical reactive Richtmyer–Meshkov instability and the role of baroclinic torque and vorticity generation are shown to be primary drivers of the flow instability.