Paper Title:
Preparation of Turbulated Cooling Hole for Gas Turbine Blade Using Electrochemical Machining
  Abstract

With the development of high performance of gas turbine engine, there is a tendency to design the ribs in the cooling hole in order to improve the heat transfer and cooling efficiency in a cooling passage. This paper focuses on a machining method of the burbulated cooling hole. The cooling hole is formed by electrochemical machining (ECM) process using a shaped electrode. The ribs on the hole wall form using ECM after the shaped electrode is lowed into the bottom of the straight hole machined in advance. The experimental results indicate that machining efficiency increases obviously. Various parameters affecting the forming of the cooling hole, such as voltages, electrolyte concentrations, and the material of the workpiece, are discussed in detail. Furthermore, the flow field and temperature field of the different type of cooling hole are analyzed using computational fluid dynamics (CFD) model and finite element method. Result shows that the heat transfer coefficient in rib channels could enhances significantly

  Info
Periodical
Edited by
Dongming Guo, Tsunemoto Kuriyagawa, Jun Wang and Jun’ichi Tamaki
Pages
699-704
DOI
10.4028/www.scientific.net/KEM.329.699
Citation
M. Wang, D. Zhu, N. S. Qu, C.Y. Zhang, "Preparation of Turbulated Cooling Hole for Gas Turbine Blade Using Electrochemical Machining", Key Engineering Materials, Vol. 329, pp. 699-704, 2007
Online since
January 2007
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