NUMERICAL CHARACTERIZATION OF A JET IMPINGEMENT COOLING SYSTEM USING COUPLED HEAT TRANSFER ANALYSIS


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Kacar E. N. , ERBAY L. B.

ASME Turbo Expo: Turbine Technical Conference and Exposition, Montreal, Kanada, 15 - 19 Haziran 2015 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1115/gt2015-43371
  • Basıldığı Şehir: Montreal
  • Basıldığı Ülke: Kanada

Özet

In this study jet impingement cooling method is investigated with coupled analysis. Total cooling rate is observed for the specific jet impingement configuration using both finite volume and finite element methods. The specific configuration contains single row of jets of separate four rowed impingement cooling system. This single row is placed at the suction side of vane near trailing edge. For the observation, fmite volume analysis is carried out via Fluent program. CFD model, which uses constant hot wall (target surface) temperature, is validated using the test case available in the literature. Constant wall temperature is 1250 K and hot gas of system is at 1500 K with 800 kPa. Moreover, conditions of cooling air are 500 K and 400 kPa. All conditions are determined to simulate specifications of a vane of middle class engine. The coupled solution is performed to calculate realistic heat transfer coefficient (htc) values. It involves concurrent execution of finite element analysis and fmite volume analysis for aero-thermal optimization. Iterations are carried out via exchanging heat transfer coefficient values for finite element analysis and metal temperature values for finite volume analysis. At the end of three iterations, 8.1 % decrease of htc values is obtained and optimum metal temperature values for the specified cooling configuration are calculated.