Experimental investigations into the effusion plate wall temperature of impingement/effusion cooling systems for gas turbine combustors

Bai, Naijian; Fan, Weijun; Zhu, Jiangnan; Miao, Hui; Yang, Xiaohu; Zhao, Yulu; Zhao, Wensheng; Zhang, Rongchun

doi:10.1016/j.ast.2022.108052

Cited by 8 publications

(1 citation statement)

References 33 publications

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“…In contrast, the jet-to-effusion distance had little effect. Bai et al (2023) experimentally investigated the effects of gap distance, impingement hole diameter, and effusion hole arrangement on cooling efficiency. They found that the increase in gap distance weakened the strength of the impingement jet and thus reduced the overall cooling performance.…”

Section: Introductionmentioning

confidence: 99%

Influence of blowing ratio on double-wall cooling characteristics under the condition of high-temperature flue gas

Yi,

Xiong,

Liu

et al. 2024

J. Glob. Power Propuls. Soc.

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Double-wall cooling has been extensively investigated due to its exceptional cooling performance. However, most previous studies on the cooling characteristics of double-wall geometry have been conducted under non-reacting conditions, neglecting the influence of high-temperature flue gas radiation. In this paper, an experiment investigation was carried out to evaluate the impact of blowing ratio <italic>M</italic> and coolant-to-gas temperature ratio on the cooling characteristics of effusion/impingement cooling at reacting flow conditions. The experiments were performed at atmospheric pressure with flame temperatures of 1,800 and 1,900 K respectively. Flue gas temperature was measured by S-type thermocouples, while an infrared camera and N-type thermocouples were employed for the gas-side wall surface temperature distribution measurements. The results demonstrate that the laterally averaged cooling effectiveness of the effusion/impingement cooling system increases with the increase of <italic>M</italic>. However, beyond a blowing ratio of 5.1, further increments in <italic>M</italic> do not significantly affect the cooling effectiveness. Moreover, it is observed that the laterally averaged cooling effectiveness gradually improves along the flow direction but at a reduced rate. Additionally, no significant changes in cooling effectiveness are observed after <italic>X</italic>/<italic>D</italic> > 50. Furthermore, when considering a blowing ratio of 4, higher coolant temperatures result in higher cooling effectiveness compared to lower coolant temperatures.

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Section: Introductionmentioning

confidence: 99%