Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel
In this study, numerical simulations were carried out to investigate the flow and heat transfer characteristics of jet array impingement cooling in the quasi-leading-edge channel of gas turbine blades. The influence laws of Reynolds number (<i>Re</i>, 10,000 to 50,000), hole diameter-to-...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/9/2/87 |
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| author | Lei Xi Jianmin Gao Liang Xu Zhen Zhao Qicheng Ruan Yunlong Li |
| author_facet | Lei Xi Jianmin Gao Liang Xu Zhen Zhao Qicheng Ruan Yunlong Li |
| author_sort | Lei Xi |
| collection | DOAJ |
| description | In this study, numerical simulations were carried out to investigate the flow and heat transfer characteristics of jet array impingement cooling in the quasi-leading-edge channel of gas turbine blades. The influence laws of Reynolds number (<i>Re</i>, 10,000 to 50,000), hole diameter-to-impingement spacing ratio (<i>d/H</i>, 0.5 to 0.9), hole spacing-to-impingement spacing ratio (<i>S/H</i>, 2 to 6), and Prandtl number (<i>Pr</i>, 0.690 to 0.968) on flow performance, heat transfer performance, and comprehensive thermal performance were examined, and the corresponding empirical correlations were fitted. The results show that increasing the <i>d/H</i> and reducing the <i>S/H</i> can effectively reduce the pressure loss coefficient in the quasi-leading-edge channel. Increasing the <i>Re</i>, reducing the <i>d/H,</i> and increasing the <i>S/H</i> can effectively enhance the heat transfer effect of the target wall. When <i>d/H</i> = 0.6 at lower Reynolds numbers and <i>S/H</i> = 5 at higher Reynolds numbers, the comprehensive thermodynamic coefficient reaches its maximum values. The average Nusselt numbers and comprehensive thermal coefficients of the quasi-leading-edge channel for steam cooling are both higher than those for air cooling. The pressure loss coefficient of the quasi-leading-edge channel is most sensitive to the change in <i>d/H</i> but is not sensitive to the change in <i>Re</i>. The average Nusselt number of the quasi-leading-edge channel is most sensitive to the change in <i>Re</i> and is least sensitive to the change in <i>Pr</i>. The comprehensive thermal coefficient of the quasi-leading-edge channel is most sensitive to the change in <i>Re</i>. The findings may provide a reference for the design of a steam-cooling structure in the leading edge channel of high-temperature turbine blades. |
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| id | doaj.art-ac49d1d35d6d4b5db4596ffe75061b89 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-09T22:54:27Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-ac49d1d35d6d4b5db4596ffe75061b892023-11-23T18:14:28ZengMDPI AGAerospace2226-43102022-02-01928710.3390/aerospace9020087Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge ChannelLei Xi0Jianmin Gao1Liang Xu2Zhen Zhao3Qicheng Ruan4Yunlong Li5State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaIn this study, numerical simulations were carried out to investigate the flow and heat transfer characteristics of jet array impingement cooling in the quasi-leading-edge channel of gas turbine blades. The influence laws of Reynolds number (<i>Re</i>, 10,000 to 50,000), hole diameter-to-impingement spacing ratio (<i>d/H</i>, 0.5 to 0.9), hole spacing-to-impingement spacing ratio (<i>S/H</i>, 2 to 6), and Prandtl number (<i>Pr</i>, 0.690 to 0.968) on flow performance, heat transfer performance, and comprehensive thermal performance were examined, and the corresponding empirical correlations were fitted. The results show that increasing the <i>d/H</i> and reducing the <i>S/H</i> can effectively reduce the pressure loss coefficient in the quasi-leading-edge channel. Increasing the <i>Re</i>, reducing the <i>d/H,</i> and increasing the <i>S/H</i> can effectively enhance the heat transfer effect of the target wall. When <i>d/H</i> = 0.6 at lower Reynolds numbers and <i>S/H</i> = 5 at higher Reynolds numbers, the comprehensive thermodynamic coefficient reaches its maximum values. The average Nusselt numbers and comprehensive thermal coefficients of the quasi-leading-edge channel for steam cooling are both higher than those for air cooling. The pressure loss coefficient of the quasi-leading-edge channel is most sensitive to the change in <i>d/H</i> but is not sensitive to the change in <i>Re</i>. The average Nusselt number of the quasi-leading-edge channel is most sensitive to the change in <i>Re</i> and is least sensitive to the change in <i>Pr</i>. The comprehensive thermal coefficient of the quasi-leading-edge channel is most sensitive to the change in <i>Re</i>. The findings may provide a reference for the design of a steam-cooling structure in the leading edge channel of high-temperature turbine blades.https://www.mdpi.com/2226-4310/9/2/87blade leading edgesteam jet arrayimpingement coolingflow and heat transfersensitivity analysis |
| spellingShingle | Lei Xi Jianmin Gao Liang Xu Zhen Zhao Qicheng Ruan Yunlong Li Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel Aerospace blade leading edge steam jet array impingement cooling flow and heat transfer sensitivity analysis |
| title | Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel |
| title_full | Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel |
| title_fullStr | Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel |
| title_full_unstemmed | Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel |
| title_short | Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel |
| title_sort | numerical investigation and parameter sensitivity analysis on flow and heat transfer performance of jet array impingement cooling in a quasi leading edge channel |
| topic | blade leading edge steam jet array impingement cooling flow and heat transfer sensitivity analysis |
| url | https://www.mdpi.com/2226-4310/9/2/87 |
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