Evaluation of mist/air film cooling of C3X vane with serrate-type trenched holes

Zhang, Runsheng; Han, Shaohua; Song, Yuanyuan; Xing, Jiangjiang; Zhou, Leping; Li, Li; Zhang, Hui; Du, Xiaoze

doi:10.1016/j.tsep.2022.101341

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Trenched holes, employed in diverse applications such as industrial furnaces and gas turbine components, epitomize an advanced film cooling technique [1][2][3]. In this method, the coolant injection hole opening is intricately linked to a longitudinal groove carved into the surface exposed to the hot mainstream gas [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Trenched shaped holes exhibited higher film cooling effectiveness than other configurations, both spanwise and streamwise, particularly downstream of the injection. In a study by Zhang et al [3], the effectiveness of Serrate-type trenched cooling holes for film cooling in turbine vanes using coolant air was explored. The research also investigated the potential of mist-assisted film cooling for efficient vane cooling.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strategic Cooling Enhancement through Trench-Shaped Injection Holes - Two-Phase Numerical Study

Verma,

Mishra

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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A two-phase numerical investigation on trench-shaped injection holes for film cooling is being conducted using Reynolds-averaged Navier-Stokes simulations to assess their practical effectiveness. The study is focusing on the cooling performance of a novel type of film holes, known as straight transverse trenches attached to a flat plate, using a mixture of water mist and air in the coolant fluid. The examination considers film cooling with varying turbulent intensities (3%, 10%, and 20%) and mist concentrations (4%, 7%, and 10%). The analysis involves adiabatic laterally averaged film cooling effectiveness parameters, with two blowing ratios ranging from 0.6 to 1.0. The findings indicate that trenched cooling holes exhibit a more uniform coolant distribution laterally at all positions, resulting in enhanced cooling performance, particularly at high blowing ratios.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strategic Cooling Enhancement through Trench-Shaped Injection Holes - Two-Phase Numerical Study

Verma,

Mishra

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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Study of film cooling on a turbine guide vane pressure side with a serrated trench

Huang,

Zhang,

et al. 2024

Numerical Heat Transfer, Part A: Applications

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Pressure Sensitive Paint and Large Eddy Simulation Investigation on the Impact of Trench Depth on Flat Plate Film Cooling Through Shaped Holes

Abdeh,

Barigozzi,

Zamiri

et al. 2023

Journal of Turbomachinery

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To increase film cooling effectiveness levels downstream of film cooling holes, trenches manufactured in the thermal barrier coating can be adopted. The performance of this solution depends on the trench geometrical characteristics, namely its depth and width. A large eddy simulation (LES)-based numerical study has been performed at Korea University to investigate the effects of trench configuration on thermal protection, resulting in a 22% increase in cooling performance compared to the reference case without a trench. The present paper reports the results of an experimental investigation carried out at Bergamo University on a Plexiglass flat plate model with a set of three fan-shaped holes incorporated into an existing wind tunnel, replicating the numerical setup. Pressure-sensitive paint (PSP) technique was used to measure the adiabatic film cooling effectiveness. Besides the standard shaped hole case, the best and worst trench configurations coming from a DoE approach have been examined at various coolant to mainstream blowing ratios M in the range between 0.5 and 3. Cases at M = 1.5 were used to cross-check the prediction capability of the LES numerical simulation for the selected trenched cases. PSP and LES results are in good agreement, also with the literature data. The high depth/low width trench was shown to give an improved performance for M larger than 1.

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Evaluation of mist/air film cooling of C3X vane with serrate-type trenched holes

Cited by 4 publications

References 27 publications

Strategic Cooling Enhancement through Trench-Shaped Injection Holes - Two-Phase Numerical Study

Strategic Cooling Enhancement through Trench-Shaped Injection Holes - Two-Phase Numerical Study

Study of film cooling on a turbine guide vane pressure side with a serrated trench

Pressure Sensitive Paint and Large Eddy Simulation Investigation on the Impact of Trench Depth on Flat Plate Film Cooling Through Shaped Holes

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