Abstract The mesh significantly influences the quality of numerical results in computational fluid dynamics (CFD) problems due to its correlation with turbulence models. In present paper a structured was generated using Gmsh and two semi-structured meshes were snappyHexMesh determine suitable distribution for simulating unsteady cavitation around plane convex hydrofoil. simulation conducted by ...

In this study, the effect of different blade shapes on aerodynamic performance NACA series airfoils under a wide variety working conditions at Reynolds number Re = 700,000 was explored. The SST k-ω turbulence model used for CFD method to investigate leading edge erosion airfoils. results indicated that an optimal thickness range exists considering erosion. If airfoil too thin or thick, increase...

To analyze the influence of tapered form two upper vertices a rectangular cube placed in channel and impact insertion hollow center obstacle, three-dimensional study was executed using K-ω SST turbulence model. Different models were presented to examine features flow with Reynolds number Re=4×104. The kinetic energy, 2D 3D time-averaged streamlines, trace-lines, streamwise velocity profiles, pr...

Thermal jet flows are the type of flow frequently encountered in engineering applications. This article aims to determine if SST k-ω turbulence model, including Low-Reynold Correction, accurately estimates Nusselt number impinging flow; because this, computational results were compared with experimental studies. comparison was made on a line (r/D) from stagnation point exit. In this article, he...

The optimization of radial guide vane structure is the key measure to reduce hydraulic loss component. research model for this paper a multistage centrifugal pump with vane. Based on SST k–ω turbulence and using CFD numerical simulation technology imitate forecast performance. influences blade numbers return circumferential distribution position transportability are studied. internal fluidity c...

In order to improve the hydraulic performance of integrated pump gate, flow pattern inlet and outlet gate is improved. This paper adopts SST k-ω turbulence model numerically calculate initial scheme verifies its internal through experiments, then adds optimizes design horn pipes orthogonal optimization. The research results conclude that significantly improved after adding horn. Under condition...

tip leakage loss introduces major part of losses of the rotor in axial gas turbines. therefore, the rotor blade tip has a considerable effect on rotor efficiency. to understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). various blade tip configurations such ...