Affiliation:
1. The Ohio State University Aerospace Research Center, Department of Mechanical and Aerospace Engineering, , 2300 West Case Road, Columbus, OH 43235
Abstract
Abstract
In this article, the role of mineral composition was assessed for Air Force Research Laboratory Test Dust (AFRL), for deposition in a realistic gas turbine engine environment. Experiments were performed on an effusion cooling test article with a coolant flow temperature of 894 K and surface temperature of 1144 K. Aerosolized dust with a 0–10 µm particle size distribution was delivered to the test article. The mineral recipe of AFRL was altered such that the presence of each of the five components ranged from 0% to 100%, and capture efficiency, hole capture efficiency, blockage per gram, and normalized deposit height were reported. Results are compared to a previous study of the intermineral synergies in an impingement cooling jet at the same temperature conditions. Despite differences in experimental facility flow geometry, overall agreement was found between the trends in the deposition behavior of the dust blends. The strong deposition effects that were observed were shown to be related to adhesion forces of particles, mechanical properties, and chemical properties of the dust minerals. Supplemental testing was performed in a high-temperature (1425–1650 K) impinging jet (200–260 m/s) to evaluate mineral effects at hot gas path conditions. Capture efficiency and morphology of dust deposits are reported. The capture efficiency in this regime was shown to correlate well with temperature, with chemical effects being secondary. An attempt was made to predict capture efficiency using chemical assessments such as a ratio of bases to acids, Ca:Si ratio, and optical basicity with only modest success.
Reference44 articles.
1. Wood, C. A., Slater, S. L., Zonneveldt, M., Thornton, J., Armstrong, N., and Antoniou, R. A., 2017, “Characterisation of Dirt, Dust and Volcanic Ash: A Study on the Potential for Gas Turbine Engine Degradation,” DST-Group-TR-3367, Australian Government Department of Defence, Victoria, Australia.
2. Role of Environment Deposits and Operating Surface Temperature in Spallation of Air Plasma Sprayed Thermal Barrier Coatings;Borom;Surf. Coat. Technol.,1996
3. Formation of High-Temperature Minerals From an Evaporite-Rich Dust in Gas Turbine Engine Ingestion Tests;Elms;ASME J. Turbomach.,2021
4. Unpacking Intermineral Synergies and Reactions During Dust Deposition in an Impingement Coolant Jet;Nied;ASME J. Turbomach.,2023
5. Protectiveness of Pt and Gd2Zr2O7 Layers on EB-PVD YSZ Thermal Barrier Coatings Against Calcium–Magnesium–Alumina–Silicate (CMAS) Attack;Wang;Ceram. Int.,2015
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