logo SBA

ETD

Digital archive of theses discussed at the University of Pisa

 

Thesis etd-02122013-113003


Thesis type
Tesi di laurea magistrale
Author
MACADDINO, FABIO ANTONINO
URN
etd-02122013-113003
Thesis title
INFLUENCE OF BOUNDARY LAYER THICKNESS ON THE NEAR-WAKE FLOW OF AN AXISYMMETIC BLUNT BASED BODY IN LAMINAR REGIME
Department
INGEGNERIA CIVILE E INDUSTRIALE
Course of study
INGEGNERIA AEROSPAZIALE
Supervisors
relatore Prof. Salvetti, Maria Vittoria
relatore Prof. Buresti, Guido
relatore Ing. Mariotti, Alessandro
Keywords
  • axisymmetric blunt based body
  • DNS
  • laminar regime
  • OpenFoam
Graduation session start date
05/03/2013
Availability
Withheld
Release date
05/03/2053
Summary
1 Introduction 2
1.1 Flow Regimes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Goals & Outline . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Geometry and Numerical Methodology 7
2.1 Geometry and Numerical Set-up . . . . . . . . . . . . . . . . . 7
2.2 Numerical Model . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Post-Processing . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Mesh and First Results 12
3.1 Mesh Sensitivity Analysis . . . . . . . . . . . . . . . . . . . . 12
3.2 Results: Re = 300 . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Results: Re = 800 . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Results: Re = 1500 . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Investigation On The Axisymmetric Regime 20
4.1 Autosimilarity Analysis . . . . . . . . . . . . . . . . . . . . . . 20
4.2 Curvature Analysis . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Delta Analysis: Dierent Body Lengths - Inlet Uniform . . . . 24
4.4 Delta Analysis: Dierent Body Lengths - Inlet  = 0:1 . . . . 30
4.5 Delta Analysis: Same Body Length=2D -Dierent Inlet Ve-
locity Prole . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
File