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Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages

Haugen, Christina G. M.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677

Abstract Details

2014, Doctor of Philosophy, Ohio State University, Mechanical Engineering.
Three-passage serpentines with aspect ratios of 1:1, 1:2, and 1:6 were numerically studied using computational fluid dynamics and heat transfer. A CFD modeling methodology was systematically developed that balanced accurately resolving the flow physics with minimizing the computational cost, targeting industrial preliminary design requirements. The method was benchmarked against two published data sets consisting of turbulators on the leading and trailing walls in skewed 45 deg; to the flow offset parallel configuration with a fixed rib pitch to height ratio of 10 and a rib height to hydraulic diameter of 0.1 to 0.058, utilizing Reynolds numbers of 25,000 and 50,000 and rotation number ranging from 0 and 0.25. Predictions were completed to study the effects of changing aspect ratio between 1:1, 1:2, and 1:6 and changing rotation numbers from 0 to 0.3. The 1:6 aspect ratio predictions varied from the lower aspect ratios. Differences included flow recirculation along the leading wall of the first passage for rotation numbers greater than or equal to 0.2 and high Nusselt numbers immediately downstream of the turn for the wall opposite the Coriolis force direction. Overall enhancement values for the test section showed the aspect ratio has a greater influence on Nusselt numbers than rotation.
Michael Dunn, Ph.D (Advisor)
Jen-Ping Chen, Ph.D (Committee Member)
Randall Mathison, Ph.D (Committee Member)
Mohammad Samimy, Ph.D (Committee Member)
Jeffrey Rambo, Ph.D (Committee Member)
315 p.
Mechanical Engineering
aspect ratio; serpentine; heat transfer; Nusselt number; rotation number; Reynolds number; Dean vortices; coriolis force; buoyancy force; turbulator; computational fluid dynamics; CFD; blade; internal passages; turbine; mid-circuit; pumping; HOST; OSU

Recommended Citations

Citations

  • Haugen, C. G. M. (2014). Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677

    APA Style (7th edition)

  • Haugen, Christina. Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages. 2014. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677.

    MLA Style (8th edition)

  • Haugen, Christina. "Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages." Doctoral dissertation, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677

    Chicago Manual of Style (17th edition)

osu1412698677
395
© 2014, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.