Validation of Standard K-Εmodel for the Analysis of Annular Diffuser
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 4
Abstract
A diffuser is a device for converting the kinetic energy of an incoming fluid into pressure. As the flow proceeds through the diffuser there is continuous retardation of the flow resulting in conversion of kinetic energy into pressure energy. Such a process is termed as diffusion. Diffuser forms an important part in flow machinery and structures. The present study involves the CFD analysis of adiffuser to evaluate the proximity of various models. The diffuser considered in the present case has both the hub and casings are diverging with unequal angles and hub angle keeping constant as 5°. The geometries of all the diffusers are calculated for constant area ratio 2 and cone angle 10°, 15°, 20°, 25°. The characteristic quantity such as pressure recovery coefficient distribution at hub and casing walls at various sections .Numerical predictions, made using Computational Fluid Dynamics (CFD), are presenteddescribing the behavior of the performance of conical diffuser with turbulence model i.e.Renormalization-group, STDk-εmodel.STDk-ε model is a new model to be used in this type of application that needs to be compared with wellestablishedmodels. The grid for the conical type geometry of the diffuser was created usingthe GAMBIT package, and the predictions from the CFD models have been obtained.
Authors and Affiliations
Nagendra K. Sharma, Ashish Dixit
Keywords
Related Articles
- EP ID EP24026
- DOI -
- Views 264
- Downloads 9
Design and Analysis of Exhaust Manifold in Diesel Engine
This project aims in re-designing an exhaust manifold by determining the thermal stresses and deflections exhibited under various operating conditions with different materials and temperatures. The objective is to ensur...
Optical Character Recognition.
Character Recognition (CR) is the process of recognizing handwritten characters. It is an active area of research and it is used in various applications such as reading license plate numbers, document processing, readin...
Exfoliated Graphite Fortified MgO-C Refractories
MgO-C refractories have found the wide range of applicability in basic oxygen furnace, electric arc furnace and in steel ladle, due to good thermal shock resistance and improved slag-corrosion resistance at elevated tem...
Design Of Enhanced 3d-Dwt for Image Transformation
The looseness of images has developed which is grown as to be a significant factor in the field of image dispensation. To lessen the volume of image there are a set of techniques in order to attain compressed picture as...
Performance Evaluation of Forced FED Micro Channels for High Heat Flux Cooling Applications
High heat flux cooling is required in many applications such as power electronics, plasma-facing components, high heat-load optical components, laser diode arrays, X-ray medical devices, and power electronics in hybrid...