Schlieren Visualization Method Team Members: Christopher Rauda Richard Nguyen Henry Luong Advisors: Dr. Trinh Pham Dr. Darrell Guillaume
Dec 21, 2015
Schlieren Visualization Method
Team Members:Christopher Rauda
Richard NguyenHenry Luong
Advisors:Dr. Trinh PhamDr. Darrell Guillaume
Combustion ProjectCombustion Project
ExhaustExhaustParticulatesParticulates
SchlierenSchlierenReactive Reactive
Flow Flow VisualizationVisualization
Non-ReactiveNon-ReactiveFlowFlow
VisualizationVisualization
Overview
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 = Gφ / Gz ro
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
Parabolic Mirrors
Condenser lense
Light Source
Slit
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
Video
Questions
Non-Reactive Flow Visualization
Joe OrtegaAna Ramos
Ana SiuDuc Do
Advisors:
Dr. Trinh Pham
Dr. Darrell Guillaume
Overview
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
♦ 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
Laser
Glass Rod
Laser Sheet
BarrierLaser stop
Test area
Combustion Chamber
Optics TableLaser Mounts
Setup
Power Box
Laser
Laser stop
Barrier
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
Dr. Trinh Pham Dr. Darrell Guillaume Christopher Reid Juan Pablo Barquero Tawana Guillaume Robert Aguilar Gustavo Aceves NASA CSULA Combustion Team