Deposition of Ingested Volcanic Ash on Surfaces in the Turbine of a Small Jet Engine

• Published in: Advanced engineering materials Vol. 15; no. 10; pp. 986 - 994
• Main Authors: Shinozaki, Maya, Roberts, Kevin A., van de Goor, Bennie, Clyne, T. William
• Format: Journal Article
• Language: English
• Published: Weinheim Blackwell Publishing Ltd 01.10.2013; Wiley-VCH
• Subjects: Aerospace engines; Applied sciences; Continuous cycle engines: steam and gas turbines, jet engines; Deposition; Engines and turbines; Exact sciences and technology; Heating; Mathematical models; Mechanical engineering. Machine design; Metals. Metallurgy; Nozzles; Production techniques; Stokes number; Surface treatment; Turbines; Volcanic ash; Aube; Champagne-Ardenne; France; Europe; Heat treatment; Lagrangian; Volcanic ash; Surface coating; Particle motion; Turbojet; Numerical method; Microstructure
• ISSN: 1438-1656; 1527-2648
• DOI: 10.1002/adem.201200357

The deposition characteristics of ingested volcanic ash were studied using a small aeroengine. Deposition was assessed using a borescope. Deposition mainly occurred on the nozzle guide vane (see Figure). A numerical model has been used to predict particle acceleration and heating. It is observed that larger particles are more likely to adhere. Larger particles are predicted to be sufficiently hot and are more likely to hit surfaces. Estimated values of Stokes numbers are consistent with the observations.