Multi-row film cooling characteristics on a vane endwall》.pdfVIP

International Journal of Heat and Mass Transfer 92 (2016) 23–33 Contents lists available at ScienceDirect International Journal of Heat and Mass Transfer journal homepage: www.else /locate/ijhmt Multi-row film cooling characteristics on a vane endwall Xueying Li ⇑, Jing Ren, Hongde Jiang Department of Thermal Engineering, Tsinghua University, Beijing 100084, PR China a r t i c l e i n f o a b s t r a c t Article history: The secondary flow vortices make the flow field near the endwall highly three-dimensional. The Received 8 May 2015 jet-to-secondary flow interaction and the interaction between multiple film rows are important for the Received in revised form 7 August 2015 understanding of endwall film cooling characteristics and the improvement of prediction method. Accepted 15 August 2015 Single row film cooling, three combinations of two-row film cooling as well as a full coverage configura- tion with five rows of film cooling on a typical flat vane endwall with matched averaged blowing ratios and density ratio to the engine condition were investigated experimentally. Detailed measurements of Keywords: adiabatic film cooling effectiveness distribution using PSP technique as well as the pressure distribution Film cooling Endwall of the endwall were performed. The single row film cooling results were used to test the applicability of Adiabatic fi