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Equivalent Heat Load Test on Hot Aircraft Engine Components

Marek Mróz A.W. Orłowicz M. Tupaj M. Lenik

Archives of Foundry Engineering | 2023 | vol. 23 | No 1 | 34-36 | DOI: 10.24425/afe.2023.144277

Keywords Heat load Heat barrier Aircraft engines

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Abstract

The paper presents the assumptions and methodology for investigating equivalent heat load testing of hot aircraft engine components. The basic heat loads occurring in an aircraft engine during aircraft flight are characterised. Diagrams of the proposed heat loads are presented, together with the number of cycles, and a test bench is characterised and shown to enable equivalent heat load testing of aircraft engine components.

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Bibliography

[1] Hejwowski, T., Weroński, A. (2000). Manufacture of wear-resistant coatings. Lublin: Politechnika Lubelska. (in Polish).
[2] Research stand in WSK PZL Rzeszów.
[3] Chaur, - Jeng Wang, & Jiaun, - Sheng Lin (2002). The oxidation of MAR M247 superalloy with Na2SO4 coating. Materials Chemistry and Physics. 76, 123-129. DOI: 10.1016/S0254-0584(01)00527-2.
[4] Goebel, J.A., Petit, F.S. & Howard, G.W. (1973). Mechanism for the hot corrosion of nickel base alloys. Metallurgical Transactions. 4, 261-270. https://doi.org/10.1007/BF02649626.
[5] Su, C.Y., Lih, W.C., Chou, C.P. & Tsai, H.C. (2001). Activated diffusion brased repair for IN 738 hot section components of gas turbine. Journal of Materials Processing Technology. 115(3), 326-332.

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Authors and Affiliations

Marek Mróz

e-mail:

ORCID:

A.W. Orłowicz

e-mail:

ORCID:

M. Tupaj

e-mail:

ORCID:

M. Lenik

e-mail:

ORCID:

Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

Influence of Microstructure and Heat Transfer Surface on the Thermal Power of Cast Iron Heat Exchangers

Marek Mróz A.W. Orłowicz M. Tupaj M. Lenik M. Kawiński M.. Kawiński

Archives of Foundry Engineering | 2021 | vo. 21 | No 4 | 93-96 | DOI: 10.24425/afe.2021.138685

Keywords Vermicular cast iron heat exchanger Thermal power Calorimetric test

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Abstract

The paper presents the results of calorimetric tests of segment elements of fireplace inserts. The aim of the work was to optimize their thermal power by replacing the previously used gray cast iron with flake graphite with gray iron with vermicular graphite and replacing the existing geometry of the heat transfer surface with a more developed one. It turned out that the thermal power of the test segments made of cast iron with vermicular graphite was higher compared to the segments of the same shape made of gray cast iron with flake graphite. It was found that the use of segments made of vermicular cast iron with a ferritic matrix allowed for an increase in the thermal power value by dozen percent, compared to segments of the same shape made of vermicular cast iron with a pearlitic matrix. The test results showed that the thermal power of the test segments depends on the variant of the development of both the heat receiving surface and the heat giving off surface. The highest value of the thermal power was obtained when ribbing in the form of a lattice was used on both of these surfaces, and the lowest when using flat surfaces.

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Bibliography

[1] Directive (2005/32/EC) EUPS Eco-design.
[2] European energy policy (2007). Bruksela 10.02.2007, COM 2007.
[3] Kubica, K. (2010). Conditions for cleaner combustion of solid fuels in domestic thermal energy production installations. Gliwice: Projekt FEWE.
[4] Research report no. 317OA314 (2014). Built-in fireplace insert for solid fuel. Performance tests. Kraków: Instytut Nafty i Gazu. Zespół Laboratoriów Badawczych Sieci, Instalacji i Urządzeń Gazowych. (in Polish).
[5] Podrzucki, Cz., Wojtysik A. (1988). Plastic unalloyed cast iron. Kraków: Part II, AGH Kraków. (in Polish).
[6] Holmgren, D., Dioszegi, A. & Svensson, I.L. (2008). Effect of carbon content and solidification rate on the thermal conductivity of grey cast iron. Tsinghua Science and Technology. 13(2), 170-176.
[7] Greig, G. (1996). Modern ingot mould production. 33 I.F.C., Paper No. 12, New Delhi.
[8] Kinal, G. & Paczkowska M. (2002). The comparison of grey cast irons in the aspects of the possibility of their laser heat treatment. Journal of Research and Applications in Agricultural Engineering. 57(1), 7376.
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[10] Monroe, R.W. & Bates, C.E. (1982). Some thermal and mechanical properties of compacted graphite iron. AFS Trans. 90, 615-619.
[11] Orłowicz, A.W. (2000). Ultrasonic method in foundry industry. Solidification of Metals and Alloys. 2(45). (in Polish).
[12] Mróz, M., Orłowicz, A.W., Tupaj, M., Jacek-Burek, M., Radoń, M., Kawiński, M. (2019). Improvement of operating performance of a cast-iron heat exchanger by application of a copper alloy coating. Archives of Foundry Engineering. 19(3), 84-87.

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Authors and Affiliations

Marek Mróz

e-mail:

ORCID:

A.W. Orłowicz

e-mail:

ORCID:

M. Tupaj

e-mail:

ORCID:

M. Lenik

e-mail:

ORCID:

M. Kawiński

M.. Kawiński

Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
Cast Iron Foundry KAWMET, ul. Krakowska 11, 37-716 Orły, Poland

The Effect of Sulphur Content on the Microstructure of Vermicular Graphite Cast Iron

Marek Mróz A.W. Orłowicz M. Tupaj M. Lenik M. Kawiński M.. Kawiński

Archives of Foundry Engineering | 2022 | vol. 22 | No 1 | 18-22 | DOI: 10.24425/afe.2022.140212

Keywords Pig iron sulphur content Vermicular graphite cast iron Microstructure

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Abstract

The application of ferritic-matrix vermicular graphite cast iron in the production of fireplace fireboxes improves their thermal output, but the consumer market for these products prioritises their price. Given this consideration, this work concerns a comparison of the quality of vermicular graphite cast iron types produced from 0.025%S pig iron (a less expensive material) and 0.010%S pig iron (a more expensive material) in terms of the number and shape of vermicular graphite precipitates varying with the magnesium level in the alloy. It turned out that the vermicular graphite cast iron made with the 0.025%S pig iron demonstrated a slightly lower number of vermicular graphite precipitates. For both vermicular graphite cast iron melts, 0.028%Mg and 0.020%Mg in the alloys provided a vermicular graphite precipitate share of approx. 50% and 95%, respectively.

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Bibliography

[1] Mróz, M., Orłowicz, A.W., Tupaj, M., Lenik, M., Kawiński, M., Kawiński, M. Influence of microstructure and heat transfer surface on the thermal power of cast iron heat exchangers. Archives of Foundry Engineering. (in progres).
[2] Podrzucki, C., Wojtysiak, A. (1987). Unalloyed plastic cast iron. Kraków: Wyd. AGH. ( in Polish).
[3] Sillen, R. (2003). Proces PQ-CGL InMold – cast iron vermicularization in mold. Biuletyn Metals and Minerals. 3, 30-34. (in Polish).
[4] Källbom, R., Hamberg, K., Björkegren, L.S. Chunky graphite in ductile cast iron castings. World Foundry Congress, 184/1-184/10, WFC 06.
[5] Goodrich, G.M. (2001). A microview of some factors that impact cast iron (or the little things that mean a lot). AFS Transactions. 01-121, 1173-1189.
[6] Pietrowski, S., Pisarek, B., Władysiak, R. (2000). Investigation of the crystallization of cast iron with vermicular graphite and description of its analytical and numerical model. Research project KBN Nr 7T08B 006 13, Łódź, (in Polish).
[7] Żyrek, A. (2014). Manufacture of vermicular cast iron by the Inmould method with the use of magnesium mortars and evaluation of its resistance to thermal fatigue. PhD thesis AGH Kraków. (in Polish).
[8] Nodżak, G. (2002). Analysis of the possibilities produced in the foundry of WSK "PZL Rzeszów" S.A. castings of a high-power diesel engine head from vermicular cast iron. Master thesis, AGH Kraków. (in Polish).
[9] Orłowicz A.W. (2000). The use of ultrasound in foundry. Monograph. Krzepnięcie Metali i Stopów. 2(45). (in Polish).
[10] Ashby, M.F. (1998). Selection of materials in engineering design. Warszawa: Wyd. Naukowo-Techniczne. (in Polish).

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Authors and Affiliations

Marek Mróz

e-mail:

ORCID:

A.W. Orłowicz

e-mail:

ORCID:

M. Tupaj

e-mail:

ORCID:

M. Lenik

e-mail:

ORCID:

M. Kawiński

M.. Kawiński

Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
Cast Iron Foundry KAWMET, ul. Krakowska 11, 37-716 Orły, Poland

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Equivalent Heat Load Test on Hot Aircraft Engine Components

Abstract

Bibliography

Authors and Affiliations

Influence of Microstructure and Heat Transfer Surface on the Thermal Power of Cast Iron Heat Exchangers

Abstract

Bibliography

Authors and Affiliations

The Effect of Sulphur Content on the Microstructure of Vermicular Graphite Cast Iron

Abstract

Bibliography

Authors and Affiliations