Professional paper
INFLUENCE OF VARIOUS MESH TYPES ON CAVITATION PHENOMENA IN THE INJECTION NOZZLE
Blaž Vajda
; University of Maribor, Faculty of Mechanical Engineering, Maribor, Slovenia
Zoran Žunić
; AVL-AST, Maribor, Slovenia
Želimir Dobovišek
; University of Maribor, Faculty of Mechanical Engineering, Maribor, Slovenia
Breda Kegl
; University of Maribor, Faculty of Mechanical Engineering, Maribor, Slovenia
Abstract
The evaporation of diesel fuel in the injection nozzle influences the injection characteristics and spray formation process significantly. In the presented paper the influence of various type of mesh on the cavitation phenomena is analysed. Since CPU (central processing unit) times are often high, partial models are used for the analysis. The numerical analysis is made for two types of fluid, diesel (D2) and biodiesel (B100), using computation fluid dynamic (CFD) program FIRE. The results are compared for various meshes and both types of fuel. The results show that higher pressure differences yield more cavitation in the injector nozzle holes and point out the importance of the structure of the mesh and its density.
Keywords
computational fluid dynamics CDFmodel; real model investigation viewpoint; theoretical model investigation viewpoint; numeric and graphic process modeling; mesh system of space coordinates; fluid flow through nozzles; fluid flow cavitation
Hrčak ID:
75306
URI
Publication date:
21.12.2011.
Visits: 1.920 *