Pre-swirl system design including inlet duct shape by using cfd analysis

Hyungyu Lee, Jungsoo Lee, Sangwook Kim, Jin Soo Cho, Donghwa Kim

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

1 Citation (Scopus)

Abstract

Fluid characteristics of two different types of duct shapes were studied and the pre-swirl nozzle was designed for partial annulus duct shape by using computational fluid dynamics. The fully annulus inlet duct shape and partial annulus inlet duct shape which are installed in front of the pre-swirl nozzles were compared from aerodynamic perspective. The new pre-swirl nozzle was designed for partial annulus inlet duct shape to resolve aerodynamic disadvantage of partial annulus duct. Design process of new pre-swirl nozzles included the optimization process to maximize the discharge coefficient. Three different pre-swirl system were compared using the discharge coefficient, swirl ratio and temperature drop. The experiments of base pre-swirl system were conducted to validate the CFD methodology and to predict the real pre-swirl system. The scale of experimental rig was one half of real pre-swirl system. As a results, the partial annulus duct with previous preswirl nozzles showed 1.1% lower discharge coefficient compared with the fully annulus duct. The new designed preswirl nozzle with partial annulus duct increased the discharge coefficient about 1.43% than the case of partial annulus duct with previous pre-swirl nozzle, and showed 0.4% lower discharge coefficient compared with the fully annulus duct shape. The swirl ratio was same through the three pre-swirl models because the three models had the same throat area. The temperature drop was measured between the inlet duct and the exit of receiver holes. In the cases of partial annulus inlet duct, the temperature drop was lower than the fully annulus inlet duct case. The new pre-swirl nozzles could resolve the aerodynamic loss occurred in the case of partial annulus duct with previous nozzles.

Original languageEnglish
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume5B-2018
ISBN (Print)9780791851098
DOIs
StatePublished - 2018 Jan 1
EventASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, GT 2018 - Oslo, Norway
Duration: 2018 Jun 112018 Jun 15

Other

OtherASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, GT 2018
CountryNorway
CityOslo
Period18/06/1118/06/15

Fingerprint

Ducts
Systems analysis
Nozzles
Aerodynamics
Computational fluid dynamics
Discharge (fluid mechanics)
Temperature

Cite this

Lee, H., Lee, J., Kim, S., Cho, J. S., & Kim, D. (2018). Pre-swirl system design including inlet duct shape by using cfd analysis. In Heat Transfer (Vol. 5B-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2018-76323
Lee, Hyungyu ; Lee, Jungsoo ; Kim, Sangwook ; Cho, Jin Soo ; Kim, Donghwa. / Pre-swirl system design including inlet duct shape by using cfd analysis. Heat Transfer. Vol. 5B-2018 American Society of Mechanical Engineers (ASME), 2018.
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abstract = "Fluid characteristics of two different types of duct shapes were studied and the pre-swirl nozzle was designed for partial annulus duct shape by using computational fluid dynamics. The fully annulus inlet duct shape and partial annulus inlet duct shape which are installed in front of the pre-swirl nozzles were compared from aerodynamic perspective. The new pre-swirl nozzle was designed for partial annulus inlet duct shape to resolve aerodynamic disadvantage of partial annulus duct. Design process of new pre-swirl nozzles included the optimization process to maximize the discharge coefficient. Three different pre-swirl system were compared using the discharge coefficient, swirl ratio and temperature drop. The experiments of base pre-swirl system were conducted to validate the CFD methodology and to predict the real pre-swirl system. The scale of experimental rig was one half of real pre-swirl system. As a results, the partial annulus duct with previous preswirl nozzles showed 1.1{\%} lower discharge coefficient compared with the fully annulus duct. The new designed preswirl nozzle with partial annulus duct increased the discharge coefficient about 1.43{\%} than the case of partial annulus duct with previous pre-swirl nozzle, and showed 0.4{\%} lower discharge coefficient compared with the fully annulus duct shape. The swirl ratio was same through the three pre-swirl models because the three models had the same throat area. The temperature drop was measured between the inlet duct and the exit of receiver holes. In the cases of partial annulus inlet duct, the temperature drop was lower than the fully annulus inlet duct case. The new pre-swirl nozzles could resolve the aerodynamic loss occurred in the case of partial annulus duct with previous nozzles.",
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Lee, H, Lee, J, Kim, S, Cho, JS & Kim, D 2018, Pre-swirl system design including inlet duct shape by using cfd analysis. in Heat Transfer. vol. 5B-2018, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, GT 2018, Oslo, Norway, 18/06/11. https://doi.org/10.1115/GT2018-76323

Pre-swirl system design including inlet duct shape by using cfd analysis. / Lee, Hyungyu; Lee, Jungsoo; Kim, Sangwook; Cho, Jin Soo; Kim, Donghwa.

Heat Transfer. Vol. 5B-2018 American Society of Mechanical Engineers (ASME), 2018.

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

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AB - Fluid characteristics of two different types of duct shapes were studied and the pre-swirl nozzle was designed for partial annulus duct shape by using computational fluid dynamics. The fully annulus inlet duct shape and partial annulus inlet duct shape which are installed in front of the pre-swirl nozzles were compared from aerodynamic perspective. The new pre-swirl nozzle was designed for partial annulus inlet duct shape to resolve aerodynamic disadvantage of partial annulus duct. Design process of new pre-swirl nozzles included the optimization process to maximize the discharge coefficient. Three different pre-swirl system were compared using the discharge coefficient, swirl ratio and temperature drop. The experiments of base pre-swirl system were conducted to validate the CFD methodology and to predict the real pre-swirl system. The scale of experimental rig was one half of real pre-swirl system. As a results, the partial annulus duct with previous preswirl nozzles showed 1.1% lower discharge coefficient compared with the fully annulus duct. The new designed preswirl nozzle with partial annulus duct increased the discharge coefficient about 1.43% than the case of partial annulus duct with previous pre-swirl nozzle, and showed 0.4% lower discharge coefficient compared with the fully annulus duct shape. The swirl ratio was same through the three pre-swirl models because the three models had the same throat area. The temperature drop was measured between the inlet duct and the exit of receiver holes. In the cases of partial annulus inlet duct, the temperature drop was lower than the fully annulus inlet duct case. The new pre-swirl nozzles could resolve the aerodynamic loss occurred in the case of partial annulus duct with previous nozzles.

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Lee H, Lee J, Kim S, Cho JS, Kim D. Pre-swirl system design including inlet duct shape by using cfd analysis. In Heat Transfer. Vol. 5B-2018. American Society of Mechanical Engineers (ASME). 2018 https://doi.org/10.1115/GT2018-76323