[PDF] Top 20 Numerical simulation of 3D transonic flow in a compressor rotor

... impossible. Transonic flow through the compressor rotor is probably one of the most difficult problems in CFD, and hence it represents a considerable challenge for the development of numerical ... See full document

... of rotor blade tip clearance in turbomachines can highly affect their performances due to the characteristics of subsequent tip leakage ...this flow may highly influence the stable operation of the ... See full document

... Besides, the number of grooves has to be provided in order to compute the time it takes to cover one pitch for the male rotor. This allows the automatic scaling of the time step in order to satisfy the maximum CFL ... See full document

... and numerical results for M = ...the flow. At transonic speeds (M = ...and numerical results without blowing showed a more aft position of the shock wave in the CFD results with only small ... See full document

... blade compressor rotor configuration is where two separate blades are mounted on a common rotating ...blade rotor can do more work at the same loss level as a single blade, which would reduce the ... See full document

... and 3D flow field ...simulate flow regions in the surfaces of the S1 ...The flow regions were established using the EURANUS ...the 3D flow area of the rotor and stator ... See full document

... unsteady flow fields at various operating conditions and to determine the operating range of the compressor rotor at design ...the numerical analysis was to explain the flow mechanisms ... See full document

... momentum flow in the boundary layer is subjected to the sudden pressure rise across the ...shock-induced flow separations occur in the ...for flow separation in the rotor passage: one is on ... See full document

... suitable numerical algorithms, compu- tation of SBLI has become ...direct numerical simulation (DNS), with the advantages of resolving all scales of fluid mo- tions, has also been adopted for the ... See full document

... for numerical damping, and Baldwin-Lomax turbulence model was also ...a numerical simulation for stall cells in rotor-stator frame of a compressor, using viscous ...a numerical ... See full document

... first rotor is as part of a 3- blade row optimization (IGV-rotor-stator) of a high-pressure ...the transonic 1.5-stage compressor were calculated using a 3D Navier-Stokes solver ... See full document

... An initial series of calculations were conducted to check the independence of the general results of the model on the mesh size and numerical time step. For each turbulence model used, it was found that, either ... See full document

... The articles on this theme describe flow in horizontal channels [5,6]. In this work [5] the authors investigate condensation of water vapor on the walls of a channel. The gas flows with high velocity in the center ... See full document

... The principle in lake tapping is to provide a tunnel under a lake, leaving a short rock plug towards the lake floor below the tapping level. The final plug is then blasted, piercing the lake floor from underneath. This ... See full document

... Figure 14 shows part of the 3-D mesh used in the computational model for the bolt windage test rig. The angular extent of the sector simulated depends on the number of bolts. The periodic boundaries of this sector lie ... See full document

... Modifying the geometry after Fig. 2.4-2, the trivial condition, given by the continuity equation, was fulfilled – proportionally with increasing the chamber radius, its height is decreasing so that the cross section ... See full document

... pressure compressor to investigation the effect of inlet total pressure distortions on rotating ...near rotor tip leading edge causes the flow spillage and leads to stall ...and transonic ... See full document

... agricultural use, which cover 90% operations of the aerial crop dusting [6] ; due to the small scale cultivation and hilly terrain, small helicopter aerial spray equipment is the leading spraying equipment in Japan [7] . ... See full document

... Better results for solution of the flow field in a bound- ary layer gives low-Reynolds two-equation k −ω model. It adds two transport partial di ff erential equations for k and ω (rate of the energy dissipation) ... See full document

... instantaneous numerical results refering to the instantaneous times of Honji are thus averaged over a few timesteps of the simulations, mimicking a short time exposure of the physical ...smoother numerical ... See full document