Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs

Tong Miin Liou, Shyy Woei Chang, Yi An Lan, Shu Po Chan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Detailed Nusselt number (Nu) distributions over the leading and trailing endwalls and the pressure drop coefficients (f) of a rotating transverse-ribbed two-pass parallelogram channel were measured. The impacts of Reynolds (Re), rotation (Ro) and buoyancy (Bu) numbers upon local and regionally averaged Nu over the endwall of two ribbed legs and the turn are explored for Re=5, 000-20, 000, Ro=0-0.3, and Bu=0.0015-0.122. It is aimed to study the combined buoyancy and Coriolis effects on thermal performances as the first attempt. A set of selective experimental data illustrates the isolated and interdependent Ro and Bu influences upon Nu with the impacts of Re and Ro on f disclosed. Moreover, thermal performance factors (TPF) for the channel tested are evaluated and compared with those collected from the channels with different cross-sectional shapes and endwall configurations to enlighten the relative heat transfer efficiency under rotating condition. Empirical Nu and f correlations are acquired to govern the entire Nu and f data generated. These correlations allow one to evaluate both isolated and combined Re, Ro and/or Bu impacts upon the thermal performances of the present rotating channel for internal cooling of gas turbine blades.

Original languageEnglish
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791850879
DOIs
Publication statusPublished - 2017 Jan 1
EventASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 - Charlotte, United States
Duration: 2017 Jun 262017 Jun 30

Publication series

NameProceedings of the ASME Turbo Expo
Volume5A-2017

Other

OtherASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
CountryUnited States
CityCharlotte
Period17-06-2617-06-30

Fingerprint

Buoyancy
Pressure drop
Heat transfer
Nusselt number
Turbomachine blades
Gas turbines
Cooling
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Liou, T. M., Chang, S. W., Lan, Y. A., & Chan, S. P. (2017). Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs. In Heat Transfer (Proceedings of the ASME Turbo Expo; Vol. 5A-2017). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2017-64265
Liou, Tong Miin ; Chang, Shyy Woei ; Lan, Yi An ; Chan, Shu Po. / Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs. Heat Transfer. American Society of Mechanical Engineers (ASME), 2017. (Proceedings of the ASME Turbo Expo).
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abstract = "Detailed Nusselt number (Nu) distributions over the leading and trailing endwalls and the pressure drop coefficients (f) of a rotating transverse-ribbed two-pass parallelogram channel were measured. The impacts of Reynolds (Re), rotation (Ro) and buoyancy (Bu) numbers upon local and regionally averaged Nu over the endwall of two ribbed legs and the turn are explored for Re=5, 000-20, 000, Ro=0-0.3, and Bu=0.0015-0.122. It is aimed to study the combined buoyancy and Coriolis effects on thermal performances as the first attempt. A set of selective experimental data illustrates the isolated and interdependent Ro and Bu influences upon Nu with the impacts of Re and Ro on f disclosed. Moreover, thermal performance factors (TPF) for the channel tested are evaluated and compared with those collected from the channels with different cross-sectional shapes and endwall configurations to enlighten the relative heat transfer efficiency under rotating condition. Empirical Nu and f correlations are acquired to govern the entire Nu and f data generated. These correlations allow one to evaluate both isolated and combined Re, Ro and/or Bu impacts upon the thermal performances of the present rotating channel for internal cooling of gas turbine blades.",
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Liou, TM, Chang, SW, Lan, YA & Chan, SP 2017, Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs. in Heat Transfer. Proceedings of the ASME Turbo Expo, vol. 5A-2017, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017, Charlotte, United States, 17-06-26. https://doi.org/10.1115/GT2017-64265

Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs. / Liou, Tong Miin; Chang, Shyy Woei; Lan, Yi An; Chan, Shu Po.

Heat Transfer. American Society of Mechanical Engineers (ASME), 2017. (Proceedings of the ASME Turbo Expo; Vol. 5A-2017).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Detailed Nusselt number (Nu) distributions over the leading and trailing endwalls and the pressure drop coefficients (f) of a rotating transverse-ribbed two-pass parallelogram channel were measured. The impacts of Reynolds (Re), rotation (Ro) and buoyancy (Bu) numbers upon local and regionally averaged Nu over the endwall of two ribbed legs and the turn are explored for Re=5, 000-20, 000, Ro=0-0.3, and Bu=0.0015-0.122. It is aimed to study the combined buoyancy and Coriolis effects on thermal performances as the first attempt. A set of selective experimental data illustrates the isolated and interdependent Ro and Bu influences upon Nu with the impacts of Re and Ro on f disclosed. Moreover, thermal performance factors (TPF) for the channel tested are evaluated and compared with those collected from the channels with different cross-sectional shapes and endwall configurations to enlighten the relative heat transfer efficiency under rotating condition. Empirical Nu and f correlations are acquired to govern the entire Nu and f data generated. These correlations allow one to evaluate both isolated and combined Re, Ro and/or Bu impacts upon the thermal performances of the present rotating channel for internal cooling of gas turbine blades.

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Liou TM, Chang SW, Lan YA, Chan SP. Isolated and coupled effects of rotating and buoyancy number on heat transfer and pressure drop in a rotating two-pass parallelogram channel with transverse ribs. In Heat Transfer. American Society of Mechanical Engineers (ASME). 2017. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/GT2017-64265