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Performance and flow characteristics of a novel air bleeding aerodynamic combustor diffuser

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Abstract

In this paper, a novel air bleeding aerodynamic diffuser is proposed based on the study of the traditional dump diffuser. The performance and flow characteristics of these two diffusers are compared and analyzed using the numerical simulation method, which is validated by experiments. The effects of length and hole diameter on the diffuser’s performance are also studied. The results reveal that, at inlet Mach numbers of 0.15, 0.20 and 0.30, compared with the dump diffuser, the total pressure loss coefficient of the new diffuser decreases by 18.52 %, 15.05 % and 40.23 %. The performance of the air bleeding aerodynamic diffuser with varing lengths has little change, which means its aerodynamic capabilities are still capable of meeting the requirements of advanced combustion chambers. As the diameter of the air bleed hole increases, the total pressure loss coefficient of the diffuser decreases and becomes gentler.

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Acknowledgments

This work is supported by Research Program supported by the National Science and Technology Major Project (Grant No. J2019-III-0022-0066) and the the National Science and Technology Major Project (Grant No. 2017-III-0002-0026).

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Authors and Affiliations

  1. School of Power and Ennergy, Northwestern Polytechnical University, Xi’an, 710072, China

    Yue Yan, Peng-fei Zhu, Dong-hui Li, You-wen Zhu, Jian-qin Suo & Yan-hui Wu

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  1. Yue Yan
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  2. Peng-fei Zhu
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  3. Dong-hui Li
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  4. You-wen Zhu
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  5. Jian-qin Suo
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  6. Yan-hui Wu
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Corresponding author

Correspondence to Jian-qin Suo.

Additional information

Yue Yan is a Ph.D. student of the School of Power and Energy, Northwestern Polytechnical University, Xi’an, China. She received her bachelor degree from Northwestern Polytechnical University. Her research interests include fluid flow, combustor diffuser and flow test methods.

Jianqin Suo is a Professor of the School of Power and Energy, Northwestern Polytechnical University, Xi’an, China. He received his master degree in Engineering Thermophysics from Beihang University. His research interests are in the area of swirling flow, spray, lean direct injection and lean premixed combustion for aero-engine.

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Yan, Y., Zhu, Pf., Li, Dh. et al. Performance and flow characteristics of a novel air bleeding aerodynamic combustor diffuser. J Mech Sci Technol 38, 483–494 (2024). https://doi.org/10.1007/s12206-023-1240-9

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  • DOI: https://doi.org/10.1007/s12206-023-1240-9

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