Studies on wake-affected heat transfer around the circular leading edge of blunt body

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Journal of Turbomachinery

DOI:https://doi.org/10.1115/1.2836688· OSTI ID:287456

Funazaki, K ^[1]

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1. Iwate Univ., Morioka, Iwate (Japan). Dept. of Mechanical Engineering

Detailed measurements are performed about time-averaged heat transfer distributions around the leading edge of a blunt body, which is affected by incoming periodic wakes from the upstream moving bars. The blunt body is a test model of a front portion of a turbine blade in gas turbines and consists of a semicircular cylindrical leading edge and a flat plate afterbody. A wide range of the steady and unsteady flow conditions are adopted as for the Reynolds number based on the diameter of the leading edge and the bar-passing Strouhal number. The measured heat transfer distributions indicate that the wakes passing over the leading edge cause a significant increase in heat transfer before the separation and the higher Strouhal number results in higher heat transfer. From this experiment, a correlation for the heat transfer enhancement around the leading edge due to the periodic wakes is deduced as a function of the Stanton number and it is reviewed by comparison with the other experimental works.

• Sponsoring Organization: USDOE
• OSTI ID: 287456
• Report Number(s): CONF-940626--
• Journal Information: Journal of Turbomachinery, Journal Name: Journal of Turbomachinery Journal Issue: 3 Vol. 118; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AUGMENTATION
GAS TURBINES
HEAT TRANSFER
STANDING WAVES
TURBINE BLADES