Enhancement of heat transfer in the leading edge of gas turbine blade with various rib turbulators

Jinhun Kim, Jeong Ju Kim, Minho Bang, Taehyun Kim, Hee Seung Park, Hyung Hee Cho

Research output: Contribution to journalArticle

Abstract

This study investigated heat transfer characteristics and improvement in a triangular channel with a rounded leading edge and rib turbulator. The channel cross section has a 120° fillet on the leading edge of the equilateral triangle. The Reynolds number based on hydraulic diameter is 30,000. The angles of the rib turbulator are 45° and 90°. The rib height to hydraulic diameter ratio is 0.079 and the rib pitch to height ratio is 8. In a triangular channel with a large curvature of leading edge, the changing pressure field caused by the rib turbulator accelerates the flow and increases heat transfer. The 90° rib showed higher heat transfer than 45° rib on the leading edge region. To further improve the heat transfer, the effect of a pin added between the ribs and rib length extension was studied. As a result, the thermal performance factor was enhanced by 4 % and 9 %, respectively.

Original languageEnglish
Pages (from-to)281-288
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume44
Issue number5
DOIs
Publication statusPublished - 2020 May

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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