The rotation speed of water at the inlet low hump outlet conduit has a great effect on its hydraulic performance. Therefore, influence different speeds loss and flow pattern is studied in this paper. By solving RANS equations RNG k-ε turbulence model, 3D field were calculated under speeds. To verify numerical results, model tests with guide vanes conducted. results show that along growth speed,...

In order to predict the atomization characteristics of process zirconia dry granulation accurately, influence nozzle outlet diameter on is analyzed. The VOF method and RNG k-ε turbulence model are applied numerically analyze flow field pressure-swirl nozzles with different diameters granulation, effects spray cone angle, liquid film thickness, pressure distribution velocity result shows that wh...

Abstract: The major effects of cylindrical and row trenched cooling holes with angles alpha=30, beta=0, alpha=40, beta=0 alpha=50, at BR=3.18 on the effectiveness film near combustor end wall surface is an important subject to study in detail. In current study, researchers used a FLUENT package 16/11 simulate 3-D model Pratt Whitney gas turbine engine. this research, RNG turbulence K-ε was anal...

The effects of projectile rotation on the internal and external flow fields supersonic fluidic element are numerically studied using sliding grid technique RNG k-ε turbulence model. rotating speed fields, switching time output characteristics studied. results show that: for field, there is no obvious change in field structure at low angular velocity; when velocity increases to 20 r/s, becomes o...

Abstract A computational study of a supersonic flow in the base region and nearest wake cylindrical body moving at speed has been carried out. In this case, “prehistory” was taken into account, i.e. configuration domain as close possible to real one. The use various RANS turbulence models for calculating analyzed. following were considered: 1) SST model; 2) Standard k– ε 3) RNG 4) Reynolds Stre...

As a general framework to determine a collision-free feedback motion strategies, the Random Neighborhood Graph (RNG) approach [19] defines a global navigation function over an approximate representation of the free configuration. In this paper, we improve the RNG approach in several aspects. We present an ANN-accelerated RNG construction algorithm to achieve near logarithmic running time in eac...