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http://dx.doi.org/10.3795/KSME-B.2006.30.9.913

Three-Dimensional Flow and Aerodynamic Loss Downstream of a Turbine Rotor Blade with a Squealer Tip  

Chae, Byoung-Joo (금오공과대학교 기계공학부)
Lee, Sang-Woo (금오공과대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.9, 2006 , pp. 913-920 More about this Journal
Abstract
Three-dimensional flow and aerodynamic loss in the tip-leakage flow region of a high-turning first-stage turbine rotor blade with a squealer tip have been measured with a straight miniature five-hole probe for the tip gap-to-chord ratio, h/c, of 2.0%. This squealer tip has a indent-to-chord ratio, $h/{st}/c$, of 5.5%. The results are compared with those for a plane tip $(h_{st}/c=0.0%)$. The squealer tip tends to reduce the mass flow through the tip gap and to suppress the development of the tip-leakage vortex. Therefore, it delivers lower aerodynamic loss in the near-tip region than the plane tip does. At the mid-span, however, the aerodynamic loss has nearly the same value for the two different tips.
Keywords
Squealer Tip; Tip Clearance; High-Turning Turbine Rotor Blad; Aerodynamic Loss;
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  • Reference
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