A numerical code that simulates combustion phenomena occurring in a solid rocket motor is developed in this study using a preconditioning algorithm. A quasi-steady-combustion process was analyzed for a composite material in a submerged nozzle. The governing equations were solved using a dual-time stepping method combined with a finite volumemethod. Themass flux and pressure in the cell face wer...

Coal is a combustible material applicable to a variety of oxidation scenarios with conditions ranging from atmospheric temperature to ignition temperature. One of the most frequent and serious causes of coal fires is self-heating or spontaneous combustion. Opening an underground coal seam to mine ventilation air, such as long-wall gob and goaf areas and coal stockpiles, creates a risk of sponta...

Combustion, while being part of our everyday experience, is a complex phenomenon involving a multitude of reactions and dynamics. There is great value in understanding combustion through mathematical modelling, not only for its own sake, but also because of the applications of the developed model to combustion-based industrial processes or to that perennial environmental threat to populace, pro...

An adaptive mesh method is presented for numerical simulation of shock-induced combustion. The method is composed of two independent ingredients: a flow solver and a mesh redistribution algorithm. The flow solver is a finite-volume based second-order upwind TVD scheme, together with a lower–upper symmetric Gauss–Seidel relaxation scheme for solving the multispecies Navier–Stokes equations with ...

The presence of particle-associated polycyclic aromatic hydrocarbons (PAHs) was investigated in mixed residential/light industrial, industrial and commercial zones in summer 2000 and winter 2001 in Tangshan, China. Thirteen PAHs were measured with the total average concentrations (ng/m) of PAHs ranged from 26.5 to 313.6 in summer and from 142.4 to 672.4 in winter. The average concentrations of ...

Cylinder pressure simulation has grown to become an important tool when developing and evaluating new engine concepts and control strategies. A new formulation of zero-dimensional multi-zone models is developed and described. A general model structure is formulated that rely on a set of differential algebraic equations that are easy to solve. The selected formulation also results in models that...

• The flow field is found to vary greatly downstream of the perforated plate. conjugate heat transfer affects NO formation by relocating flame. preferential diffusion intensified due two-dimensionality flow. coupling effect these factors above determines generation rate. present work examines x emission characteristics a premixed micro-combustion system with plate implemented. For this, three-d...

engine performance depends on two main factors of engine speed and ignition time. ignition timing can affect engine life, fuel economy and engine power. in this paper, to study engine performance of peugeot 206 tu3a with comparison ratio of 10.5:1 and displacement of 1361cc in matlab software, a two-zone burned/unburned model with the fuel burning rate described by awiebe function was used for ...