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Enhancing Ejector Pump Performance: Two-Phase Flow Characterization and Applications

This research focuses on the performance characterization of two-phase (vapor-liquid) flow through ejector pumps, a significant advancement over current models that typically assume single-phase flow. By gathering experimental data with varying geometries and flow conditions, we aim to establish reliable correlations essential for engineers. Findings will support applications in aerospace, nuclear, and chemical industries where conventional pumps are inadequate, particularly in low-power environments. This multidisciplinary study involves collaboration among experts and utilizes advanced lab technologies to interpret and analyze flow data accurately.

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Enhancing Ejector Pump Performance: Two-Phase Flow Characterization and Applications

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  1. Pump Jet Geometry Cheryl Clark, Engr Teacher, Victoria East High Dr. Cable Kurwitz Cheyn Worn, Grad Student, Nuclear Engr

  2. Typical Ejector Pump

  3. 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

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

  5. 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

  6. Sight Glass

  7. Boiler

  8. Two Phase Flow

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

  10. Typical Ejector Pump F,P-HEAT DP-1 DP-2 DP-3 DP-4 F,P-EVAP DP-5

  11. Data Interpretation • Plots made by dumping data from Labview to Excel and Matlab

  12. 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

  13. Research Lab • Multidisciplinary • Ejector Jet: Mechanical Engineering • Applications: Aerospace, Nuclear, Chemical, Mechanical

  14. 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

  15. Summary • Gather experimental data on two-phase ejector jet operation • Wide variety of applications • Air condtioning systems • Vacuum distillation • Optimal mixing • Replace typical pumps

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

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