Showing papers by "Preeti Aghalayam published in 2015"
TL;DR: In this article, the authors studied spalling behavior of a lignite coal, which is characterized by high moisture and volatile matter, and suggested a possible underlying mechanism, and measured the rate of spalling using an experimental setup under the UCG-like conditions.
22 citations
TL;DR: In this paper, a ducted laminar premixed V-flame was studied and the role of flame dynamics was investigated using high-speed imaging, showing that each dynamical state is characterized by a particular sequence of flame behavior.
Abstract: Combustion instability is a nonlinear process with interaction between combustion and acoustics. The nonlinearity in the combustion process is observed in the flame dynamics. In our study of a ducted laminar premixed V-flame, we varied the distance between the flame anchor and the duct exit. We observed that the thermoacoustic system bifurcates from a stable state to a frequency locked state, followed by quasi-periodicity, period 3 oscillations, and finally chaotic oscillations. During the occurrence of these dynamical states, the role of flame dynamics is investigated using high speed imaging. We observed wrinkle formation, its propagation and growth along flame front, rollup of the flame, separation, and annihilation of flame elements during instability. From the present study it is found that each dynamical state is characterized by a particular sequence of flame behavior, highlighting the role of nonlinear flame dynamics in establishing the observed dynamical state.
18 citations
TL;DR: In this article, the effect of exhaust gas recirculation (EGR) on NOx emissions and in Compression Ignition (CI) engines at various conditions is investigated. And the results show that EGR is a potential option for controlling in-cylinder NOx.
5 citations
TL;DR: In this article, the authors developed a transient model for packed bed reactors, which takes into account the formation of N2O as an undesirable byproduct during the reduction of NO.