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TECHNICAL PAPERS

The Application of Advanced Methods in Analyzing the Performance of the Air Curtain in a Refrigerated Display Case

[+] Author and Article Information
Homayun K. Navaz

Kettering University, Flint, MI 48504

Ramin Faramarzi

Southern California Edison Company, Irwindale, CA 91702

Morteza Gharib

California Institute of Technology, Pasadena, CA 91125

Dana Dabiri

California Institute of Technology, Pasadena, CA 91125

Darius Modarress

Viosense Corporation, Pasadena, CA 91106

J. Fluids Eng 124(3), 756-764 (Aug 19, 2002) (9 pages) doi:10.1115/1.1478586 History: Received March 14, 2001; Revised January 14, 2002; Online August 19, 2002
Copyright © 2002 by ASME
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References

Faramarzi,  R., 1999, “Efficient Display Case Refrigeration,” ASHRAE J., Nov., pp. 46–51.
Stribling,  D., Tassou,  S. A., and Mariott,  D., 1999, “A Two-Dimensional CFD Model of a Refrigerated Display Case,” ASHRAE Trans., Nov., pp. 88–94.
Navaz, H. K., 2000, ROYA© : A 2-D/3-D Code for Compressible, Incompressible Flows and Heat Transfer in Solids, Users Manual.
Willert,  C. E., and Gharib,  M., 1991, “Digital Particle Image Velocimetry,” Exp. Fluids, 10, pp. 181–193.
Westerweel,  J., Dabiri,  D., and Gharib,  M., 1997, “The Effect of a Discrete Window Offset on the Accuracy of Cross-Correlation Analysis of PIV Recordings,” Exp. Fluids, 23, pp. 20–28.
Gharib, M., and Dabiri, D., 1999, An Overview of Digital Particle Image Velocimetry in Flow Visualization: Techniques and Examples, Smiths, A. and Lim, T. T., eds.
Navaz,  H. K., and Dang,  A. D., 1994, “The Development of the Liquid Thrust Chamber Performance (LTCP) Code for Turbulent Two-Phase Flow Combustion of Dense Sprays,” Final Report Prepared for NASA/MSFC, Contract No. NAS8-38798.
Navaz,  H. K., and Berg,  R. M., 1999, “Formulation of Navier-Stokes Equations for Moving Grid and Boundary,” J. Propul. Power, 15(1), Jan.–Feb.
Navaz,  H. K., and Berg,  R. M., 1998, “Numerical Treatment of Multi-Phase Flow Equations with Chemistry and Stiff Source Terms,” J. of Aerospace Science and Technology, 2(3), Mar.–Apr., pp. 219–229.
Dang, A. L., Navaz, H. K., and Coats, D. E., 1988, “PNS Solution of Non-Equilibrium Reacting Flow In Rocket Nozzles,” 25th JANNAF Combustion Meeting, NASA/MSFC, Huntsville, AL.
Berker,  D. R., Coats,  D. E., Dang,  A. L., Dunn,  S. S., and Navaz,  H. K., 1990, “Viscous Interaction Performance Evaluation Routine for Nozzle Flows with Finite Rate Chemistry, (VIPER),” Final Report (Phase III) and Computer Users’ Manual, Prepared for the Air Force Astronautics Laboratory, Edwards Air Force Base, California, Report No. AL-TR-90-042.

Figures

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(a) Case schematics and sensor locations with discharge and return grills. (b) Schematic of the display case with dimensions. (c) Simulator and dummy products used in the display case. (d) Multi-deck display case used in the present study.
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Typical DPIV experimental setup
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Computational grid and zones
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Air velocity profile at the display case outlet for Scenario 1
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Mean velocity and streamline fields for Scenario 1
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Axial velocity contours at the opening
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Components of velocity profile along the display case opening as predicted by the CFD and DPIV techniques for Scenario 1
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CFD results for temperature contours in Scenario 1
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Infrared image of the tested display case with corresponding temperature profile
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Velocity profile at the discharge grill for test Scenario 3 predicted by the DPIV technique
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Mean vertical velocity and streamline fields for test Scenario 3
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Components of velocity profile along the display case opening as predicted by the CFD and DPIV techniques for Test Scenario 3
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Temperature contours for test Scenario 3
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Infiltration rate as a function of the discharge air average velocity and temperature by parabolic curve fit
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Infiltration rate as a function of the discharge air average velocity and temperature by linear curve fit

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