Effects of Pressure-Side Winglet at an Elevation of Tip Surface on the Tip-Leakage Flow and Aerodynamic Loss Downstream of a Turbine Blade Equipped with Pressure-Side Squealer Tip
- Authors
- Cheon, Joo Hong; Lee, Sang Woo
- Issue Date
- Oct-2016
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- Gas Turbine; Unshrouded Tip; Pressure-Side Winglet; Pressure-Side Squealer; Total-Pressure Loss Coefficient
- Citation
- TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B, v.40, no.10, pp 645 - 651
- Pages
- 7
- Journal Title
- TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B
- Volume
- 40
- Number
- 10
- Start Page
- 645
- End Page
- 651
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/22017
- DOI
- 10.3795/KSME-B.2016.40.10.645
- ISSN
- 1226-4881
- Abstract
- Effects of pressure-side winglet width on the tip leakage flow and aerodynamic loss downstream of a turbine blade with a pressure-side squealer rim have been investigated for the tip gap-to-span ratio of h/s = 1.36%. The pressure-side squealer has a fixed height-to-span ratio of h(p)/s = 3.75% and the pressure-side winglet, which is installed at an elevation of tip surface, has width-to-pitch ratios of w/p = 2.64%, 5.28%, 7.92% and 10.55%. The results show that with increasing w/p, aerodynamic loss in the passage vortex region decreases, whereas that in the leakage flow region increases. As a result, the mass-averaged loss coefficient all over the measurement plane tends to decrease minutely with the increment of w/p. It is concluded that the pressure-side winglet for the pressure-side squealer tip can hardly contribute to the tip-leakge loss reduction.
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Collections - Department of Mechanical Engineering > 1. Journal Articles
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