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

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

Bibliographic Details
Main Author: Haugen, Christina G. M.
Language:English
Published: The Ohio State University / OhioLINK 2014
Subjects:
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
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-osu14126986772021-08-03T06:27:41Z Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages Haugen, Christina G. M. 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 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. 2014 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677 http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic 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
spellingShingle 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
Haugen, Christina G. M.
Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
author Haugen, Christina G. M.
author_facet Haugen, Christina G. M.
author_sort Haugen, Christina G. M.
title Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
title_short Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
title_full Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
title_fullStr Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
title_full_unstemmed Numerical Investigation of Thermal Performance for Rotating High Aspect Ratio Serpentine Passages
title_sort numerical investigation of thermal performance for rotating high aspect ratio serpentine passages
publisher The Ohio State University / OhioLINK
publishDate 2014
url http://rave.ohiolink.edu/etdc/view?acc_num=osu1412698677
work_keys_str_mv AT haugenchristinagm numericalinvestigationofthermalperformanceforrotatinghighaspectratioserpentinepassages
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