Transcript CombustionTeam080609

Schlieren Visualization Method
Team Members:
Christopher Rauda
Richard Nguyen
Henry Luong
Advisors:
Dr. Trinh Pham
Dr. Darrell Guillaume
Combustion Project
Non-Reactive
Flow
Visualization
Schlieren
Reactive
Flow
Visualization
Exhaust
Particulates
Overview
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Project Objective
Background
Current Set Up
Progress
Questions
Project Objective
 To make a relationship between the Schlieren method and swirl
number.
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 = G φ / Gz r o
Where Gφ 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
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.
Z-Type Schlieren
Schlieren Setup
Slit
Condenser
lense
Parabolic
Mirrors
Light
Source
Current Progress
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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
Video
Questions
Non-Reactive Flow Visualization
Joe Ortega
Ana Ramos
Ana Siu
Duc Do
Advisors:
Dr. Trinh Pham
Dr. Darrell Guillaume
Overview
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Background
Objective
Equipment
Setup
Progress
Future Work
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
Objective
 To produce visual-flow field using:
♦ Laser
♦ Materials
 To capture field with a camera
 To analyze the images captured
Setup Equipment
 Laser/Optics Table Setup
♦ Melles Griot 35 mW-head Laser
 Red Dot
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Laser Stop
Laser Barrier
Laser Mount
Glass Rods
Glass-Rod Support
Tin Cans as mixing and combustion chamber prototypes
Flow Meter
Laser Flow Visualization Schematic
 The simplest method
of visualizing flow
structures
Glass
Rod
Test
area
Laser
Laser Mounts
Laser
Sheet
Optics Table
Combustion
Chamber
Laser
stop
Barrier
Setup
Barrier
Laser
stop
Power Box
Laser
Accomplishments
 Tested Laser beam through different materials
♦ Smoke Bombs
♦ Dry Ice
♦ Incense Sticks
 Partially Constructed Air-Smoke Mixing Chamber
♦ Used Incense
Dry Ice and Incense Experiments
Short-Term Goals
 Complete Air-Smoke Mixing Chamber
 Test Mixing Chamber with prototype chamber
Acknowledgements
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Dr. Trinh Pham
Dr. Darrell Guillaume
Christopher Reid
Juan Pablo Barquero
Tawana Guillaume
Robert Aguilar
Gustavo Aceves
NASA CSULA Combustion Team