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