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Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
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Author | Fu, Zhong-Yi Zhu, Hui-Ren Liu, Cun-Liang Liu, Cong Li, Zheng |
Copyright Year | 2016 |
Abstract | This paper experimentally investigates the film cooling performance of an enlarged turbine guide vane with full-coverage cylindrical hole film cooling in short duration transonic wind tunnel which can model realistic engine aerodynamic conditions and adjust inlet Reynolds number and isentropic exit Mach number independently. The effects of mass flow rate ratio (MFR=4.83%∼8.83%), inlet Reynolds number (Rein= 1.7×105∼5.7×105), and isentropic exit Mach number (Mais=0.81∼1.01) are investigated. There are five rows of cylindrical film cooling holes on the pressure side and four such rows on the suction side respectively. Another four rows of cylindrical holes are provided on the leading edge to obtain a showerhead film cooling. The surface heat transfer coefficient and adiabatic film cooling effectiveness are derived from the surface temperatures measured by the thermocouples mounted in the middle span of the vane surface based on transient heat transfer measurement method. Mass flow rate ratio is shown to have a significant effect on film cooling effectiveness. The increase of mass flow rate ratio increases film cooling effectiveness on pressure side, while increasing this factor has opposite effect on film cooling effectiveness on the suction side. At the same mass flow rate ratio, increasing the Reynolds number can enhance the film cooling performance, the expectation is that at low mass flow rate ratio condition increasing the Reynolds number decreases film cooling effectiveness on the pressure side. The heat transfer coefficient increases with the mass flow rate ratio increasing on both pressure and suction side. At middle and high inlet Reynolds number condition, in the region of 0.4 |
Sponsorship | International Gas Turbine Institute |
File Format | |
ISBN | 9780791849804 |
DOI | 10.1115/GT2016-56839 |
Volume Number | Volume 5C: Heat Transfer |
Conference Proceedings | ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition |
Language | English |
Publisher Date | 2016-06-13 |
Publisher Place | Seoul, South Korea |
Access Restriction | Subscribed |
Subject Keyword | Suction Temperature Wind tunnels Cascades (fluid dynamics) Reynolds number Thermocouples Transient heat transfer Flow (dynamics) Pressure Engines Guide vanes Coolants Film cooling Heat transfer coefficients Turbines Heat transfer Mach number |
Content Type | Text |
Resource Type | Article |
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