An improved spark ignition model has been developed and implemented into the KIVA-3V code. In this model, the spark ignition kernel growth is tracked by Lagrangian particle markers. The effects of turbulent flow and spark discharge energy on the kernel growth are considered. After the ignition kernel size exceeds a critical size related to the integral turbulent length scale of the flow, the tu...

The present study uses large-eddy simulations (LES) to identify the underlying mechanism that governs ignition and stabilization mechanisms of ECN Spray A flame for different injection pressures (Pinj) ambient temperatures (Tam). Two Pinj 50 MPa 150 MPa, as well two Tam 750 K 900 are considered. numerical model is validated against experimental fuel penetration, radial mixture fraction distribu...

Europium-doped yttrium silicate (Y2SiO5:Eu ) nanophosphors were successfully synthesized by flame spray pyrolysis method. The effect of silicon concentration on the crystal structure and morphology of the Y2SiO5:Eu 3+ phosphors were investigated. Asprepared phosphor consists of spherical nanoparticles with filled morphology, high crystallinity, narrow size distribution, and intense photolumines...

A flame shape descriptor based on coordinates of edge of a flame is proposed. Artificial Neural Network is used to predict flame image edges .A flame with constant x-coordinate is used in the present study. Y-coordinates of flame edge are predicted using neural network. Recognition experiments were carried out using flame image sampled from a burning candle. The results show a good recognition ...

0010-2180/$ see front matter 2010 The Combust doi:10.1016/j.combustflame.2010.02.018 * Corresponding author. Address: University of Illin Mechanical & Industrial Engineering, 842 West Tayl 7022, USA. Fax: +1 312 413 0441. E-mail address: [email protected] (S.K. Aggarwal). Injector flow dynamics and primary breakup processes are known to play a pivotal role in determining combustion and emissions in d...

In the flame retardancy of biopolymer matrix and natural fibre reinforcement containing green composites, researchers face multiple challenges, such as low thermal stability, candlewick effect fibres compatibility issues. Cellulosic have been shown to char-promoting properties advantageously interact with intumescent systems. this work, melamine-polyphosphate was combined neat or flame-retardan...