Studies on effusion cooling: Impact of geometric parameters on cooling effectiveness and coolant consumption
| Autor: | Vishal Venkatesh, Balajee Ramakrishnananda, A R Srikrishnan, Ratna Kishore Velamati, J Sriraam, K Subhash, Suresh Batchu, D Bala Vignesh |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Field (physics) Turbulence 020209 energy Aerospace Engineering 02 engineering and technology Mechanics 01 natural sciences 010305 fluids & plasmas Coolant Transverse plane Effusion 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Mass flow rate Combustor Combustion chamber Astrophysics::Galaxy Astrophysics |
| Zdroj: | Aerospace Science and Technology. 77:58-66 |
| ISSN: | 1270-9638 |
| DOI: | 10.1016/j.ast.2017.12.044 |
| Popis: | This study is focused on the impact of certain important geometric parameters on cooling effectiveness and coolant consumption for effusion cooling of aircraft combustor liner. The three dimensional turbulent flow field in a domain representing the combustor with several rows of effusion coolant injection is considered for the analysis. The geometric parameters considered are: angle of injection of the coolant, axial and transverse pitch of the injection holes, hole spacing and hole diameter. Also, based on the analysis of the temperature field within the chamber, a novel concept of ‘variable hole diameter’ has been introduced to reduce coolant consumption. A symmetric 3D computational model including the combustion chamber, coolant chamber and the effusion plate was used for the study. Conjugate heat transfer was modeled between the effusion-cooled wall and the two chambers. A detailed mass flow rate analysis has been performed for the various cases in order to study the impact of parameters on coolant consumption. The proposed approach of using an effusion plate with variable hole diameters is found to be effective in reducing the net coolant consumption significantly while maintaining a given level of cooling effectiveness. |
| Databáze: | OpenAIRE |
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