Premixed and stratified Liquefied Petroleum Gas (LPG)/air flames realized on a bluff body swirl-stabilized burner are studied in confined environment. A laboratory-scale is designed such way that it can independently investigate the effects of mixture stratification, swirl number, direction, Reynolds number broad range test conditions. total 80 different cases investigated, with four combinatio...

Oxides of Nitrogen are the major emission from a diesel engine. It is due to heterogeneous diffusion combustion system with fuel-rich regions, which produce high local temperature around the periphery of the spray where high formation rate of NO is promoted. Various techniques are therefore employed to reduce the NOX emission like EGR, SCR, etc. In this present work a rotating injector is a tec...

oxides of nitrogen are the major emission from a diesel engine. it is due to heterogeneous diffusion combustion system with fuel-rich regions, which produce high local temperature around the periphery of the spray where high formation rate of no is promoted. various techniques are therefore employed to reduce the nox emission like egr, scr, etc. in this present work a rotating injector is a tec...

The recirculation zone created through vortex breakdown mechanisms in swirling flows plays a vital role for aerodynamic stabilization of turbulent flames practical combustion systems. This interacts with the central (CRZ) an upstream bluff body and this leads to complex flow behavior that depends on blockage ratio swirl number. It has been previously observed bubble (VBB) merges CRZ at large nu...

The measurements of a turbulent swirl flow in the subchannels of a 5 x 5 rod array having typical mixing devices at the MATIS-H (Measurements and Analysis of Turbulence In SubchannelsHorizontal) facility have been analysed using a commercial CFD code of STAR-CCM+ 4.02 with a unit grid model having no unmatched grid interface. The main objectives of this analysis is to establish a proper CFD ana...

In this paper the static pressure field of an annular swirling jet is measured indirectly using stereo-PIV measurements. The pressure field is obtained from numerically solving the Poisson equation, taken into account the axisymmetry of the flow. At the boundaries no assumptions are made and the exact boundary conditions are applied. Since all source terms can be measured using stereo-PIV and t...

Internal combustion engines in now a days is the best available reliable source of power for all domestic, large scale industrial and transportation applications. The major issue arises at the efficiency of these engines. Every attempt made to improve these engines tends to attain the maximum efficiency. The performances of the diesel engines are enhanced by proper design of inlet manifold, exh...

Abstract—A 3C-2D PIV technique was applied to investigate the swirling flow generated by an axial plus tangential type swirl generator. This work is focused on the near-exit region of an isothermal swirling jet to characterize the effect of swirl on the flow field and to identify the large coherent structures both in unconfined and confined conditions for geometrical swirl number, Sg = 4.6. Eff...

In marine gas turbines, variations in rotational speed occur all the time. To ensure adequate cooling effects on turbine blades, valves need to be adjusted change pressure upstream of pre-swirl nozzle. Changing such will have significant local or overall parameters, as core swirl ratio, temperature, flow rate coefficient, moment axial thrust etc. this paper, we studied characteristics within sy...