Shower Head and Trailing Edge Cooling Influence on Transonic Vane Aero Performance

QC 20150217
An experimental investigation on a cooled nozzle guide vane has been conducted in an annular sector to quantify aerodynamic influences of shower head and trailing edge cooling. The investigated vane is a typical high pressure gas turbine vane, geometrically similar to a real engine component, operated at a reference exit Mach number of 0.89. The investigations have been performed for various coolant-to-mainstream mass-flux ratios. New loss equations are derived and implemented regarding coolant aerodynamic losses. Results lead to a conclusion that both trailing edge cooling and shower head film cooling increase the aerodynamic loss compared to an uncooled case. In addition, the trailing edge cooling has higher aerodynamic loss compared to the shower head cooling. Secondary losses decrease with inserting shower head film cooling compared to the uncooled case. The trailing edge cooling appears to have less impact on the secondary loss compared to the shower head cooling. Area-averaged exit flow angles around midspan increase for the trailing edge cooling.

Fridh, JensKTH,Kraft- och värmeteknologi(Swepub:kth)u1ouhj7i (author)
Fransson, TorstenKTH,Kraft- och värmeteknologi(Swepub:kth)u1yzxi2t (author)
Mamaev, BorisSiemens LLC Energy Oil & Gas Design Department, Russia(Swepub:kth)u1tpa5e5 (author)
Annerfeldt, MatsSiemens Industrial Turbomachinery AB, Finspång, Sweden,Gas Turbine (author)
Utriainen, EsaSiemens Industrial Turbomachinery AB, Finspång, Sweden,Gas Turbine Heat transfer (author)
KTHKraft- och värmeteknologi (creator_code:org_t)

By the author/editor: Saha, Ranjan, 19 ...; Fridh, Jens; Fransson, Torste ...; Mamaev, Boris; Annerfeldt, Mats; Utriainen, Esa

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Aerospace Engine ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

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