Taylor-Couette-Poiseuille flow heat transfer in a high Taylor number test rig
Article
Article Title | Taylor-Couette-Poiseuille flow heat transfer in a high Taylor number test rig |
---|---|
Article Category | Article |
Authors | Swann, Phillip B., Russell, Hugh and Jahn, Ingo H. |
Journal Title | Journal of the Global Power and Propulsion Society |
Journal Citation | 5, pp. 126-147 |
Number of Pages | 22 |
Year | 2021 |
Publisher | Global Power and Propulsion Society |
Place of Publication | Switzerland |
ISSN | 2515-3080 |
Digital Object Identifier (DOI) | https://doi.org/10.33737/jgpps/140252 |
Web Address (URL) | https://journal.gpps.global/Taylor-Couette-Poiseuille-flow-heat-transfer-in-a-high-Taylor-number-test-rig,140252,0,2.html |
Abstract | As technology advances, rotating machinery are operating at higher rotational speeds and increased pressures with greater heat concentration (i.e. smaller and hotter). This combination of factors increases structural stresses, while increasing the risk of exceeding temperature limits of components. To reduce stresses and protect components, it is necessary to have accurately designed thermal management systems with well-understood heat transfer characteristics. Currently, available heat transfer correlations operating within high Taylor number (above 1×10^10) flow regimes are lacking. In this work, the design of a high Taylor number flow experimental test rig is presented. A non-invasive methodology, used to capture the instantaneous heat flux of the rotating body, is also presented. Capability of the test rig, in conjunction with the use of high-density fluids, increases the maximum Taylor number beyond that of previous works. Data of two experiments are presented. The first, using air, with an operating Taylor number of 8.8± 0.8 ×10^7 and an effective Reynolds number of 4.2± 0.5 ×10^3, corresponds to a measured heat transfer coefficient of 1.67 ± 0.9 ×10^2 W/m2K and Nusselt number of 5.4± 1.5×10^1. The second, using supercritical carbon dioxide, demonstrates Taylor numbers achievable within the test rig of 1.32±0.8×10^12. A new correlation using air, with operating Taylor numbers between 7.4×10^6 and 8.9×10^8 is provided, comparing favourably with existing correlations within this operating range. A unique and systematic approach for evaluating the uncertainties is also presented, using the Monte-Carlo method. |
Keywords | heat transfer; experimental investigation; taylor-couette-poiseuille flow |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 4012. Fluid mechanics and thermal engineering |
Byline Affiliations | University of Queensland |
https://research.usq.edu.au/item/z218v/taylor-couette-poiseuille-flow-heat-transfer-in-a-high-taylor-number-test-rig
Download files
38
total views13
total downloads1
views this month1
downloads this month