Pump Jet Geometry

Cheryl Clark, Engr Teacher, Victoria East High

Dr. Cable Kurwitz

Cheyn Worn, Grad Student, Nuclear Engr

Typical Ejector Pump

Research Objective• Characterize the performance of two-phase (vapor-

liquid) flow through an ejector.

• Current models assume single phase (liquid or gas) flow.

• Two-phase flow is difficult to model

• Engineers typically rely on correlations from experimental data

Experimental Procedure

• Gather data at different two-phase flow conditions for varying geometries within the ejector

Experimental Procedure

• Change the geometry of the ejector• Set the motive fluid flow• Vary the gas to liquid ratio in the suction by

varying power to the heater• Data is collected using Labview

Sight Glass

Boiler

Two Phase Flow

Data• Sixteen Instrument Readings:– Pressure– Differential Pressure (dP)– Temperature–Mass flow (suction and motive)

Typical Ejector Pump

F,P-HEATDP-1

F,P-EVAPDP-5

DP-2 DP-3 DP-4

Data Interpretation

• Plots made by dumping data from Labview to Excel and Matlab

Real World Applications

• Replacement of typical pumps that have moving parts with more passive and reliable ejector pumps

• Applications with a need for air conditioning in low power areas such as an airplane on the runway or a vehicle in space (no electrically driven pump)

• Utilize benefits of two phase flow

Research Lab

• Multidisciplinary

• Ejector Jet: Mechanical Engineering

• Applications: Aerospace, Nuclear, Chemical,

Mechanical

Dr. Cable Kurwitz

• Space Engineering Research Center and Nuclear Power Institute

• Doctorate in Nuclear Engineering• Licensed Professional Engineer• Wide Array of interdisciplinary subjects• Director of Systems Engineering Initiative

Summary• Gather experimental data on two-

phase ejector jet operation

• Wide variety of applications– Air condtioning systems– Vacuum distillation– Optimal mixing– Replace typical pumps

Acknowledgements

• TAMU E3 Program• National Science Foundation• Texas Workforce Commission• Nuclear Power Institute• Dr. Cable Kurwitz• Cheyn Worn