ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
With the development of high performance of gas turbine engine, there is a tendency todesign the ribs in the cooling hole in order to improve the heat transfer and cooling efficiency in acooling passage. This paper focuses on a machining method of the burbulated cooling hole. Thecooling hole is formed by electrochemical machining (ECM) process using a shaped electrode. Theribs on the hole wall form using ECM after the shaped electrode is lowed into the bottom of thestraight hole machined in advance. The experimental results indicate that machining efficiencyincreases 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 usingcomputational fluid dynamics (CFD) model and finite element method. Result shows that the heattransfer coefficient in rib channels could enhances significantly
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.699.pdf
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