An efficient winglet coverage for aeroengine turbine blade flat tip and its loss map

Jae Sung Jeong, Seon Woo Bong and Sang Woo Lee

Energy, 2022, vol. 260, issue C

Abstract: The stage efficiency of an axial-flow turbine is influenced considerably by the leakage loss over its blade tip. The objective of this experimental study is (i) to find the best winglet coverage for the blade flat tip in an aeroengine turbine cascade of strong reaction and (ii) to know its full aerodynamic performance. In order to do this, aerodynamic losses for seven different winglets of new streamlined design are measured and then the loss map for the best winglet is completed with the variations of h/s (tip gap-to-span ratio) and w/p (winglet width-to-pitch ratio) for the first time, by employing five-hole probe measurement system. The result shows that double-sided winglets lead to lower loss than single-sided ones and the double-sided winglet covering pressure-side and upstream suction-side is found to be the best one. The loss map for the best winglet reveals that higher h/s leads to higher loss for any w/p, and higher w/p results in lower loss for any h/s. With increasing h/s, the loss reduction by the best winglet of w/p = 5.0% becomes more considerable and is closer to that by the one of w/p = 10.0%. Regardless of h/s, the present best winglet tip has lower loss than the full squealer tip that is widely employed in modern gas turbines.

Keywords: Aeroengine turbine blade; Flat tip; Tip clearance gap; Winglet coverage; Winglet width; Loss map (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222020473
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:260:y:2022:i:c:s0360544222020473

DOI: 10.1016/j.energy.2022.125153

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().