Swirling flow generates rotating flows, turbulence and free jet wakes at the downstrean of swirler in combustion chamber. Swirling flow generates complex interaction between pressure gradients and fluid flow. To study the flow behavior and its effect in combustion chamber, experimental procedure is performed and recirculation zone is found out by using unsymetrical six vanes swirler.Here vanes used are of 45° at exit of swirler and 10° at inlet to the flow.To find out three dimentional velocities, five hole probe is used with multi tube manometer.To findout velocity at inlet duct anemometer is used. To validate experimental results, three dimentional flow within the flow geometry and through the swirler have been simulated by means of computational fluid dynamics(CFD) usind the code FLUENT Swirler applicable for producing CRZ (Central Recirculating Zone) to control length & stability of flame. Whole assembly design includes inlet pipes, Swirler, diffuser, expansion chamber, and tailpipe.The core objective of this study is to present the details of the experimental swirl flow. The flow through 8 blades at 45° rotating vane swirler is studied by using CFD Ansys. Present work gives complete behaviour and knowledge about recirculation zone & effect of guide vanes.