Numerical investigation of particle deposition on converging slot-hole film-cooled wall

Abstract

Numerical research on the dilute particles movement and deposition characteristics in the vicinity of converging slot-hole(console) was carried out, and the effect of hole shape on the particle deposition characteristics was investigated. The EI-Batsh deposition model was used to predict the particle deposition characteristics. The results show that the console hole has an obvious advantage in reducing particle deposition in comparison with cylindrical hole, especially under higher blowing ratio. The coolant jet from console holes can cover the wall well. Furthermore, the rotation direction of vortices near console hole is contrary to that near cylindrical hole. For console holes, particle deposition mainly takes place in the upstream area of the holes.

Keywords

gas–solid flow / particle deposition / film-cooled wall / converging slot film cooling hole / numerical simulation

References

[1] LuoK, NixAC, KangB S. Effects of syngas particulate fly ash deposition on the mechanical properties of thermal barrier coating on simulated film-cooled turbine vane components [J]. International Journal of Clean Coal & Energy, 2014, 3(1): 54-64

[2] HamedA, TabakoffW C, WenglarzR. Erosion and deposition in turbomachinery [J]. Journal of Propulsion & Power, 2006, 22(2): 350-360

[3] SundaramN, TholeK A. Effects of surface deposition, hole blockage, and thermal barrier coating spallation on vane endwall film-cooling [J]. ASME Journal of Turbomachinery, 2006, 129(3): 599-607

[4] BrunK, NoredM, KurzR. Particle transport analysis of sand ingestion in gas turbine engines [J]. ASME Journal of Engineering for Gas Turbines and Power, 2011, 134(1): 141-146

[5] LawsonS A, TholeK A. Effects of simulated particle deposition on film cooling [J]. Journal of Turbomachinery, 2009, 133(2): 41-51

[6] SreedharanS S, TaftiD K. Effect of blowing ratio on early stage deposition of syngas ash on a film-cooled vane leading edge using large eddy simulations [J]. Journal of Turbomachinery, 2013, 135(6): 522-535

[7] DavidsonF T, KistenmacherD A, BogardD G. A study of deposition on a turbine vane with a thermal barrier coating and various film cooling geometries [J]. Journal of Turbomachinery, 2014, 136(4): 1769-1780

[8] LawsonS A, TholeK A. Simulations of multi-phase particle deposition on endwall film-cooling holes in transverse trenches [J]. Journal of Turbomachinery, 2011, 134(5): 157-172

[9] TangC, ZhangJ-z. Deposition characteristics of tube bundles in particulate cross-flow [J]. Journal of Central South University: Science and Technology, 2015, 46(12): 4679-4685

[10] HamedA, TabakoffW, WenglarzR. Erosion and deposition in turbomachinery [J]. Journal of Propulsion and Power, 2006, 22(2): 350-360

[11] DobrowolskiB, WydrychJ. Evaluation of numerical models for prediction of areas subjected to erosion wear [J]. Applied Mechanics and Engineering, 2006, 11(4): 735-749

[12] Ei-BatshHModeling particle deposition on compressor and turbine blade surfaces [D], 2001, Vienna, Vienna University of Technology

[13] ShahA, TaftiD K. Transport of particulates in an internal cooling ribbed duct [J]. ASME Journal of Turbomachinery, 2007, 129: 816-825

[14] WammackJ E, CrosbyJ, FletcherD, BonsJ P, FletcherT H. Evolution of surface deposits on a high pressure turbine blade, part I: Physical characteristics [J]. Journal of Turbomachinery, 2008, 130(2): 53-59

[15] RozatiA, TaftiD K, SreedharanS S. Effects of syngas ash particle size on deposition and erosion of a film cooled leading edge [J]. Journal of Turbomachinery, 2008, 133(133): 589-598

[16] AiW G, MurrayN, FlercherT H, HardingS, LewisS, BonsJ P. Deposition near film cooling holes on a high pressure turbine vane [J]. Journal of Turbomachinery, 2008, 134(4): 825-835

[17] AiW G, FletcherT H. Computational analysis of conjugate heat transfer and particulate deposition on a high pressure turbine vane [J]. ASME Journal of Turbomachinery, 2012, 134(134): 74-89

[18] AiW G, MurrayN, FletcherT H. Effect of hole spacing on deposition of fine coal fly ash near film cooling holes [J]. ASME Journal of Turbomachinery, 2009, 134(4): 0141021

[19] ZhouJ-h, ZhangJ-z. Numerical investigation on particle deposition inside turbine cascade [J]. Acta Aeronautica et Astronautica Sinica, 2013, 34112492-2499

[20] BunkerR S. A review of turbine shaped film cooling technology [J]. ASME Journal of Heat Transfer, 2005, 127(4): 441-453

[21] SargisonJ E, OldfieldM L G, GuoS M, LockD, RawlinsonA J. Flow visualization of the external flow from a converging slot-hole film-cooling geometry [J]. Experiments in Fluids, 2005, 38(3): 304-318

[22] YaoY, ZhangJ-z. Investigation on film cooling characteristics from a row of converging slot-holes on flat plate[J]. Science in China: Technology Science, 2011, 54(7): 1793-1800

[23] LiuC-l, ZhuH-r, BaiJ-t, XuD-c. Film cooling performance of converging slot-hole rows on a gas turbine blade[J]. International Journal of Heat and Mass Transfer, 2010, 53(23): 5232-5241

[24] YaoY, ZhangJ-z, TanX-m. Numerical study of film cooling from converging slot-hole on a gas turbine blade suction side [J]. International Communications in Heat and Mass Transfer, 2014, 52(2): 61-72

[25] GosmanA D, IoannidesE. Aspects of computer simulation of liquid fuelled combustor [J]. Journal of Energy, 1983, 7(6): 482-490

[26] BrachR, DunnP. A Mathematical model of the impact and adhesion of microspheres [J]. Aerosol Science and Technology, 1992, 16(1): 51-64

[27] SoltaniM, AhmadiG. On particle adhesion and removal mechanism in turbulent flows [J]. Journal of Adhesion Science and Technology, 1994, 8(7): 763-785