Outline Introduction Experiment Houston Results Conclusion Acknowledgements B.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony Weerasinghe June 18, 2007 Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony Weerasinghe B.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
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OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
B.U.R.S.T.: Bubbles in Reduced gravity and SlugTransitions
Stephen Brawner, Natalie J. Durgin, Nisha George, DanPederson, Anthony Weerasinghe
June 18, 2007
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Introduction
Experiment
Houston
Results
Conclusion
Acknowledgements
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
What is Two-phase flow?
Two-phase flow: The simultaneous flow of both gas and liquidstates
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Flow Patterns in Zero Gravity
I
Figure: Bubble flow
I
Figure: Slug flow
I
Figure: Annular Flow
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Flow Patterns in Zero Gravity
I
Figure: Bubble flow
I
Figure: Slug flow
I
Figure: Annular Flow
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Flow Patterns in Zero Gravity
I
Figure: Bubble flow
I
Figure: Slug flow
I
Figure: Annular Flow
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Big Picture
We want to understand two-phase flow better so that we don’thave to avoid it.
I The rapid change between liquid and gas phases causeproblems for water treatment, petroleum production, andspace station facilities.
I Slug formation in pipes leads to rapid changes in pressure andmass flow, which can seriously damage pipelines and causeplant shutdowns. It is difficult to predict slug transitions.
I Presently, complex controls attempt to evade two-phase flow.
I System complexity increases maintenance and functionalitycosts.
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Big Picture
We want to understand two-phase flow better so that we don’thave to avoid it.
I The rapid change between liquid and gas phases causeproblems for water treatment, petroleum production, andspace station facilities.
I Slug formation in pipes leads to rapid changes in pressure andmass flow, which can seriously damage pipelines and causeplant shutdowns. It is difficult to predict slug transitions.
I Presently, complex controls attempt to evade two-phase flow.
I System complexity increases maintenance and functionalitycosts.
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Big Picture
We want to understand two-phase flow better so that we don’thave to avoid it.
I The rapid change between liquid and gas phases causeproblems for water treatment, petroleum production, andspace station facilities.
I Slug formation in pipes leads to rapid changes in pressure andmass flow, which can seriously damage pipelines and causeplant shutdowns. It is difficult to predict slug transitions.
I Presently, complex controls attempt to evade two-phase flow.
I System complexity increases maintenance and functionalitycosts.
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Big Picture
We want to understand two-phase flow better so that we don’thave to avoid it.
I The rapid change between liquid and gas phases causeproblems for water treatment, petroleum production, andspace station facilities.
I Slug formation in pipes leads to rapid changes in pressure andmass flow, which can seriously damage pipelines and causeplant shutdowns. It is difficult to predict slug transitions.
I Presently, complex controls attempt to evade two-phase flow.
I System complexity increases maintenance and functionalitycosts.
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Buble/Slug Transition
Hypothesized bubble-slug transition occurs at:
ReGS
ReLS= K1Su−2/3 (1)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Apparatus
Figure: ApparatusStephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Schematic
Figure: Schematic
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Water System
Figure: Water System
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Air System
Figure: Air System
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Houston!
Figure: BURST Team
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Figure: Vomit Bags
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Figure: Floating
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Figure:
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Figure:
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Figure:
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Conclusion
Analysis still being conducted.
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions
OutlineIntroductionExperiment
HoustonResults
ConclusionAcknowledgements
Acknowledgements
I Professor Jon Jacobsen: Faculty Advisor
I Professor Cardenes: Faculty Advisor
I Professor Duron: DAQ Donor
I Dr. Stan Love: Mudd Astronaut
I Dr. Donn Sickorez: Policy and Affairs (NASA)
I Mr. John Yaniec: Technical/Safety Advisor (NASA)
I Mr. Dominic Delrosso: Technical/Flight Advisor (NASA)
Stephen Brawner, Natalie J. Durgin, Nisha George, Dan Pederson, Anthony WeerasingheB.U.R.S.T.: Bubbles in Reduced gravity and Slug Transitions