Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations

Liquid Crystal Thermography is a widely used experimental technique in the gas turbine heat transfer community. In turbine heat transfer, determination of the convective heat transfer coefficient (<i>h</i>) and adiabatic film cooling effectiveness (<i>η</i>) is imperative in...

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Autores principales:	Srinath V. Ekkad, Prashant Singh
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	liquid crystal thermography LCT turbine heat transfer Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/8282c142a32c4b52bddb12c0f86fdd97
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spelling	oai:doaj.org-article:8282c142a32c4b52bddb12c0f86fdd972021-11-25T17:18:22ZLiquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations10.3390/cryst111113322073-4352https://doaj.org/article/8282c142a32c4b52bddb12c0f86fdd972021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1332https://doaj.org/toc/2073-4352Liquid Crystal Thermography is a widely used experimental technique in the gas turbine heat transfer community. In turbine heat transfer, determination of the convective heat transfer coefficient (<i>h</i>) and adiabatic film cooling effectiveness (<i>η</i>) is imperative in order to design hot gas path components that can meet the modern-day engine performance and emission goals. LCT provides valuable information on the local surface temperature, which is used in different experimental methods to arrive at the local <i>h</i> and <i>η</i>. The detailed nature of <i>h</i> and <i>η</i> through LCT sets it apart from conventional thermocouple-based measurements and provides valuable insights into cooling designers for concept development and its further iterations. This article presents a comprehensive review of the state-of-the-art experimental methods employing LCT, where a critical analysis is presented for each, as well as some recent investigations (2016–present) where LCT was used. The goal of this article is to familiarize researchers with the evolving nature of LCT given the advancements in instrumentation and computing capabilities, and its relevance in turbine heat transfer problems in current times.Srinath V. EkkadPrashant SinghMDPI AGarticleliquid crystal thermographyLCTturbine heat transferCrystallographyQD901-999ENCrystals, Vol 11, Iss 1332, p 1332 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	liquid crystal thermography LCT turbine heat transfer Crystallography QD901-999
spellingShingle	liquid crystal thermography LCT turbine heat transfer Crystallography QD901-999 Srinath V. Ekkad Prashant Singh Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
description	Liquid Crystal Thermography is a widely used experimental technique in the gas turbine heat transfer community. In turbine heat transfer, determination of the convective heat transfer coefficient (<i>h</i>) and adiabatic film cooling effectiveness (<i>η</i>) is imperative in order to design hot gas path components that can meet the modern-day engine performance and emission goals. LCT provides valuable information on the local surface temperature, which is used in different experimental methods to arrive at the local <i>h</i> and <i>η</i>. The detailed nature of <i>h</i> and <i>η</i> through LCT sets it apart from conventional thermocouple-based measurements and provides valuable insights into cooling designers for concept development and its further iterations. This article presents a comprehensive review of the state-of-the-art experimental methods employing LCT, where a critical analysis is presented for each, as well as some recent investigations (2016–present) where LCT was used. The goal of this article is to familiarize researchers with the evolving nature of LCT given the advancements in instrumentation and computing capabilities, and its relevance in turbine heat transfer problems in current times.
format	article
author	Srinath V. Ekkad Prashant Singh
author_facet	Srinath V. Ekkad Prashant Singh
author_sort	Srinath V. Ekkad
title	Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
title_short	Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
title_full	Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
title_fullStr	Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
title_full_unstemmed	Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations
title_sort	liquid crystal thermography in gas turbine heat transfer: a review on measurement techniques and recent investigations
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8282c142a32c4b52bddb12c0f86fdd97
work_keys_str_mv	AT srinathvekkad liquidcrystalthermographyingasturbineheattransferareviewonmeasurementtechniquesandrecentinvestigations AT prashantsingh liquidcrystalthermographyingasturbineheattransferareviewonmeasurementtechniquesandrecentinvestigations
_version_	1718412541269377024

Liquid Crystal Thermography in Gas Turbine Heat Transfer: A Review on Measurement Techniques and Recent Investigations

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