OPEN ACCESS
A dynamic indentation experiment is presented for assessment of the adhesive behavior of a range of coatings in erosive defouling of commercial aircraft engines using CO2 dry-ice. A series of experiments is presented in which particles made from a reference material (polyoxymethylene – POM) and from CO2 dry-ice are made to impact compressor airfoils under a range of impact angle and velocity conditions. The
airfoils investigated are coated with an indicator material (PTFE), which is typically used to visualise the defouling effect in large scale compressor defouling experiments. In addition, fouled compressor airfoils taken from service and coated with a fouling typically found in low-pressure compressor stages are investigated. The energy required for the reference particles (POM) to create a defouling effect for the different coatings is determined by an experimental evaluation of their coefficient of restitution. This energy requirement is assumed to be fouling specific. Empirical defouling functions are presented. They correlate the defouling effect for both particle materials under various impact conditions. The empirical correlations are developed into a simulation procedure to predict particle impact erosion and energy dissipation of coated surfaces in numerical indentation simulations.
aircraft engine defouling, CO2 dry-ice blasting, HSC experiment, solid particle restitution
[1] Kurz, R. & Brun, K., Fouling mechanisms in axial compressors. Journal of Engineering for Gas Turbines and Power, 134, pp. 1–9, 2012. https://doi.org/10.1115/1.4004403
[2] Syverud, E., Brekke, O. & Bakken, L.E., Axial compressor deterioration caused by saltwater ingestion. Proceedings of GT2005, ASME Turbo Expo, Reno-Tahoe, Nevada, USA, pp. 1–11, 2005.
[3] Meher-Homji, C. & Bromley, A., Gas turbine axial compressor fouling and washing. Proceedings of the 33rd Turbomachinery Symposium, pp. 163–191, 2004.
[4] Syverud, E. & Bakken, L.E., Online water wash tests of ge j85-13. Proceedings of GT2005, ASME Turbo Expo, Reno-Tahoe, Nevada, USA, pp. 1–9, 2005.
[5] Giljohann, S., Braeutigam, K., Kuhn, S., Annasiri, S. & Russ, G., Investigations into the on-wing cleaning of commercial jet engines with co2 dry ice blasting. Deutscher Luft- und Raumfahrkongress, Berlin, Germany, pp. 1–9, 2012.
[6] Rudek, A., Russ, G. & Duignan, B., Particle laden flow investigations in special pur- pose dry-ice blasting applications. International Journal of Computational Methods and Experimental Measurement, 4, pp. 393–402, 2016. https://doi.org/10.2495/cmem-v4-n4-393-402
[7] Finnie, I., Erosion of surfaces by solic particles. Wear, 3, pp. 87–103, 1960. https://doi.org/10.1016/0043-1648(60)90055-7
[8] Grant, G. & Tabakoff, W., Erosion prediction in turbomachinery resulting from environmental solid particles. Journal of Aircraft, 12, pp. 471–478, 1975. https://doi.org/10.2514/3.59826
[9] Chen, X., McLaury, B.S. & Shirazi, S.A., Numerical and experimental investigation of the relative erosion severity between plugged tees and elbows in dilute gas/solid two- phase flow. Wear, 261, pp. 715–729, 2006. https://doi.org/10.1016/j.wear.2006.01.022
[10] Zhang, Y., McLaury, B.S., Shirzai, S.A. & Russell, R.D., Simulations of particle-wall- turbulence interactions, particle motion and erosion in with a commercial CFD code. Proceedings of FEDSM2006, 2006 ASME Joint US - European Fluids Engineering Summer Meeting, Miami, Florida, USA, pp. 1–16, 2006.
[11] Oka, Y.I., Okamura, K. & Yoshida, T., Practical estimation of erosion damage caused by solid particle impact part 1: Effects of impact parameters on a predictive equation. Wear, 259, pp. 95–101, 2005. https://doi.org/10.1016/j.wear.2005.01.039
[12] Oka, Y. & Yoshida, T., Practical estimation of erosion damage caused by solid particle impact part 2: Mechanical properties of materials directly associated with erosion damage. Wear, 259, pp. 102–109, 2005. https://doi.org/10.1016/j.wear.2005.01.040
[13] Li, D., Elalem, K., Anderson, M. & Chiovelli, S., A microscale dynamical model for wear simulation. Wear, 225–229, pp. 380–386, 1999. https://doi.org/10.1016/s0043-1648(98)00368-8
[14] Chen, Q. & Li, D., Computer simulation of solid particle erosion. Wear, 254, pp. 203–210, 2003. https://doi.org/10.1016/s0043-1648(03)00006-1
[15] Kim, J.H., Joob, H.G. & Lee, K.Y., Simulation of solid particle erosion in WC-NI coated wall using CFD. Journal of Materials Processing Technology, 224, pp. 240–245. https://doi.org/10.1016/j.jmatprotec.2015.01.022
[16] Zhang, H. & Dong, X., Finite element analysis of multiple solid particles erosion in cermet coating. Surface and Coatings Technology, 262, pp. 184–190, 2015. https://doi.org/10.1016/j.surfcoat.2014.12.040
[17] Djurovic, B., Jean, E., Papini, M., Tangestanian, P. & Spelt, J.K., Coating removal from fiber-composites and aluminum using starch media blasting. Wear, 224, pp. 22–37, 1999. https://doi.org/10.1016/s0043-1648(98)00308-1
[18] Li, M.Z., Liu, W.W., Qing, X.C., Yu, Y., Liu, L.H., Tang, Z.J., Wang, H.J., Dong, Y.Z. & Zhang, H.C., Feasibility study of a new approach to removal of paint coatings in remanufacturing. Journal of Materials Processing Technology, 234, pp. 102–112, 2016. https://doi.org/10.1016/j.jmatprotec.2016.03.014
[19] Cernuschi, F., Guardamagna, C., Capelli, S., Lorenzoni, L., Mack, D.E. & Moscatelli, A., Solid particle erosion of standard and advanced thermal barrier coatings. Wear, 348–349, pp. 43–51, 2016. https://doi.org/10.1016/j.wear.2015.10.021
[20] Weston, D.P., Shipway, P.H. & Harris, S.J., Coating removal from an industrial poly- propylene blend by cryogenic blasting: The development of substrate damage. Wear, 258, pp. 392–401, 2005. https://doi.org/10.1016/j.wear.2004.01.021
[21] Zouari, B. & Touratier, M., Simulation of organic coating removal by particle impact. Wear, 253, pp. 488–497, 2002. https://doi.org/10.1016/s0043-1648(02)00141-2
[22] Shipway, P.H., Bromley, J.P.D. & Weston, D.P., Removal of coatings from polymer sub- strates by solid particle blasting to enhance reuse or recycling. Wear, 263, pp. 309–317, 2007. https://doi.org/10.1016/j.wear.2006.11.032
[23] Papini, M. & Spelt, J.K., The plowing erosion of organic coatings by spherical particles. Wear, 222, pp. 38–48, 1998. https://doi.org/10.1016/s0043-1648(98)00274-9
[24] Hutchings, I.M. & Winter, R.E., The erosion of ductile metals by spherical particles. Journal of Applied Physics, 8, pp. 8–17, 1975. https://doi.org/10.1088/0022-3727/8/1/010
[25] Hutchings, I.M., Winter, R.E. & Field, J.E., Solid particle erosion of metals: The removal of surface material by spherical projectiles. Proceedings of the Royal Society of London Series A, Mathematical and Physical Sciences, 348, pp. 379–392, 1976.
[26] Hutchings, I., Further studies of the oblique impact of a hard sphere against a ductile solid. International Journal of Mechanical Sciences, 23, pp. 639–646, 1981. https://doi.org/10.1016/0020-7403(81)90018-7
[27] Sundararajan, G. & Shewmon, P.G., The oblique impact of a hard ball against ductile, semi-infinite target materials experiment and analysis. International Journal of Impact Engineering, 6, pp. 3–22, 1987. https://doi.org/10.1016/0734-743x(87)90003-0
[28] Tirupataiah, Y. & Sundararajan, G., A dynamic indentation technique for the charac- terization of the high strain rate plastic flow behaviour of ductile metals and alloys. Journal of Mechanics and Physics of Solids, 39, pp. 243–271, 1991. https://doi.org/10.1016/0022-5096(91)90005-9
[29] Barnocky, G. & Davis, R.H., Elastohydrodynamic collision and rebound of spheres: Experimental verification. Physics of Fluids, 31, pp. 1324–1329, 1988. https://doi.org/10.1063/1.866725
[30] Davis, R.H., Rager, D.A. & Good, B.T., Elastohydrodynamic rebound of spheres from coated surfaces. Journal of Fluid Mechanics, 468, pp. 107–119, 2002. https://doi.org/10.1017/s0022112002001489
[31] Papini, M. & Spelt, J.K., Organic coating removal by particle impact. Wear, 213, pp. 185–199, 1997. https://doi.org/10.1016/s0043-1648(97)00062-8
[32] Wall, S., John, W., Wang, H.C. & Goren, S.L., Measurements of kinetic energy loss for particles impacting surfaces. Aerosol Science and Technology, 12, pp. 926–946, 1990. https://doi.org/10.1080/02786829008959404
[33] Gondret, P., Hallouin, E., Lance, M. & Petit, L., Experiments on the motion of a solid sphere toward a wall: from viscous dissipation to elastohydrodynamic bouncing. Physics of Fluids, 11, pp. 2803–2805, 1999. https://doi.org/10.1063/1.870109
[34] Gondret, P., Lance, M. & Petit, L., Bouncing motion of spherical particles in fluids. Physics of Fluids, 14, pp. 643–652, 2002. https://doi.org/10.1063/1.1427920
[35] Kleis, I. & Hussainova, I., Investigation of particle wall impact process. Wear, 233–235, pp. 168–173, 1999. https://doi.org/10.1016/s0043-1648(99)00175-1
[36] Kleis, I. & Kulu, P., Solid particle erosion. Springer, 2008.
[37] Hussainova, I., Schade, K.P. & Tisler, S., Dynamic coefficients in impact mechanics. Proceedings of Estonian Academic and Scientific Engineering, 12, pp. 26–39, 2006.
[38] Hussainova, I. & Schade, K.P., Correlation between solid particle erosion of cermets and particle impact dynamics. Tribology International, 41, pp. 323–330, 2008. https://doi.org/10.1016/j.triboint.2007.09.001