Investigations on the effect of different influencing factors on film cooling effectiveness under the injection of synthetic coolant
| Autor: | Xinlei Duan, Yang Du, Baoquan Guo, Yutian Pan, Jianlong Chang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Science Flow (psychology) 02 engineering and technology Cooling flow 01 natural sciences Article 010305 fluids & plasmas symbols.namesake 0103 physical sciences Astrophysics::Galaxy Astrophysics Blow molding Multidisciplinary Mechanics 021001 nanoscience & nanotechnology Aspect ratio (image) Mechanical engineering Coolant Vortex Aerospace engineering Synthetic jet symbols Medicine Strouhal number 0210 nano-technology |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-14 (2021) |
| ISSN: | 2045-2322 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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