Schlieren Visualization Method

1
Schlieren Visualization Method
Team Members Christopher Rauda Richard
Nguyen Henry Luong
Advisors Dr. Trinh Pham Dr. Darrell Guillaume
2
Combustion Project
Exhaust Particulates
Schlieren Reactive Flow Visualization
Non-Reactive Flow Visualization
3
Overview

• Project Objective
• Background
• Current Set Up
• Progress
• Questions

4
Project Objective

• To make a relationship between the Schlieren
  method and swirl number.

5
Background

• The strong favorable effects of applying swirl to
  injected air and fuel are used to stabilize the
  high intensity combustion process and an
  efficient clean combustion
• Swirl is characterized by
• S Gf / Gz ro
• Where Gf and Gz are tangential and axial
  momentum
• Swirl number calculation approaches

aUniversity of Patras, Department of Mechanical
Engineering and Aeronautics, Laboratory of
Applied Thermodynamics, Greece
6
Background

• What is Schlieren?
• Schlieren method illustrates density gradients.
• This method utilizes optical mirrors and lenses
  to produce an image.
• These are the range in densities found within the
  flow.

7
Z-Type Schlieren
8
Schlieren Setup
Slit
Condenser lense
Light Source
Parabolic Mirrors
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
Current Progress

• Successful Schlieren set up
• Construction of flow meter mount
• Installation of pressure gages
• Created connection of tubing to combustion
  chamber
• Air
• Fuel
• Initial test of combustion chamber

13
Video
14
Questions
15
Non-Reactive Flow Visualization

• Joe Ortega
• Ana Ramos
• Ana Siu
• Duc Do

Advisors Dr. Trinh Pham Dr. Darrell Guillaume
16
Overview

• Background
• Objective
• Equipment
• Setup
• Progress
• Future Work

17
Background

• Non Reactive Flow
• Making transparent fluid flow visible without
  combustion
• Non-reactive flow visualization consists of laser
  tomography imaging technique used to create
  laser sheet to light fluid flow
• Using this method to appreciate the flow
  structures and compare with reactive flow

18
Objective

• To produce visual-flow field using
• Laser
• Materials
• To capture field with a camera
• To analyze the images captured

19
Setup Equipment

• Laser/Optics Table Setup
• Melles Griot 35 mW-head Laser
• Red Dot
• Laser Stop
• Laser Barrier
• Laser Mount
• Glass Rods
• Glass-Rod Support
• Tin Cans as mixing and combustion chamber
  prototypes
• Flow Meter

20
Laser Flow Visualization Schematic

• The simplest method of visualizing flow structures

Laser Sheet
Glass Rod
Barrier
Laser stop
Test area
Laser
Combustion Chamber
Optics Table
Laser Mounts
21
Setup
Barrier
Laser stop
Power Box
Laser
22
Accomplishments

• Tested Laser beam through different materials
• Smoke Bombs
• Dry Ice
• Incense Sticks
• Partially Constructed Air-Smoke Mixing Chamber
• Used Incense

23
Dry Ice and Incense Experiments
24
Short-Term Goals

• Complete Air-Smoke Mixing Chamber
• Test Mixing Chamber with prototype chamber

25
Acknowledgements

• Dr. Trinh Pham
• Dr. Darrell Guillaume
• Christopher Reid
• Juan Pablo Barquero
• Tawana Guillaume
• Robert Aguilar
• Gustavo Aceves
• NASA CSULA Combustion Team