Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant

Abstract By combining the synthetic jet and film cooling, the incident cooling flow is specially treated to find a better film cooling method. Numerical simulations of the synthetic coolant ejected are carried out for analyzing the cooling performance in detail, under different blowing ratios, hole...

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Autores principales:	Jianlong Chang, Xinlei Duan, Yang Du, Baoquan Guo, Yutian Pan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/db46f0730152413f866d3095cae0734e
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spelling	oai:doaj.org-article:db46f0730152413f866d3095cae0734e2021-12-02T14:26:47ZInvestigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant10.1038/s41598-021-83080-92045-2322https://doaj.org/article/db46f0730152413f866d3095cae0734e2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83080-9https://doaj.org/toc/2045-2322Abstract By combining the synthetic jet and film cooling, the incident cooling flow is specially treated to find a better film cooling method. Numerical simulations of the synthetic coolant ejected are carried out for analyzing the cooling performance in detail, under different blowing ratios, hole patterns, Strouhal numbers, and various orders of incidence for the two rows of holes. By comparing the flow structures and the cooling effect corresponding to the synthetic coolant and the steady coolant fields, it is found that within the scope of the investigations, the best cooling effect can be obtained under the incident conditions of an elliptical hole with the aspect ratio of 0.618, the blow molding ratio of 2.5, and the Strouhal number St = 0.22. Due to the strong controllability of the synthetic coolant, the synthetic coolant can be controlled through adjusting the frequency of blowing and suction, so as to change the interaction between vortex structures for improving film cooling effect in turn. As a result, the synthetic coolant ejection is more advisable in certain conditions to achieve better outcomes.Jianlong ChangXinlei DuanYang DuBaoquan GuoYutian PanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jianlong Chang Xinlei Duan Yang Du Baoquan Guo Yutian Pan Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
description	Abstract By combining the synthetic jet and film cooling, the incident cooling flow is specially treated to find a better film cooling method. Numerical simulations of the synthetic coolant ejected are carried out for analyzing the cooling performance in detail, under different blowing ratios, hole patterns, Strouhal numbers, and various orders of incidence for the two rows of holes. By comparing the flow structures and the cooling effect corresponding to the synthetic coolant and the steady coolant fields, it is found that within the scope of the investigations, the best cooling effect can be obtained under the incident conditions of an elliptical hole with the aspect ratio of 0.618, the blow molding ratio of 2.5, and the Strouhal number St = 0.22. Due to the strong controllability of the synthetic coolant, the synthetic coolant can be controlled through adjusting the frequency of blowing and suction, so as to change the interaction between vortex structures for improving film cooling effect in turn. As a result, the synthetic coolant ejection is more advisable in certain conditions to achieve better outcomes.
format	article
author	Jianlong Chang Xinlei Duan Yang Du Baoquan Guo Yutian Pan
author_facet	Jianlong Chang Xinlei Duan Yang Du Baoquan Guo Yutian Pan
author_sort	Jianlong Chang
title	Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
title_short	Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
title_full	Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
title_fullStr	Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
title_full_unstemmed	Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
title_sort	investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/db46f0730152413f866d3095cae0734e
work_keys_str_mv	AT jianlongchang investigationsontheeffectofdifferentinfluencingfactorsonfilmcoolingeffectivenessundertheinjectionofsyntheticcoolant AT xinleiduan investigationsontheeffectofdifferentinfluencingfactorsonfilmcoolingeffectivenessundertheinjectionofsyntheticcoolant AT yangdu investigationsontheeffectofdifferentinfluencingfactorsonfilmcoolingeffectivenessundertheinjectionofsyntheticcoolant AT baoquanguo investigationsontheeffectofdifferentinfluencingfactorsonfilmcoolingeffectivenessundertheinjectionofsyntheticcoolant AT yutianpan investigationsontheeffectofdifferentinfluencingfactorsonfilmcoolingeffectivenessundertheinjectionofsyntheticcoolant
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Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant

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