Consideration of the effect of manufacturing deviations from the shape of a multistage axial compressor

The paper presents the results of influence for manufacturing deviations from the shape of the flow part – cavities obtained during the refinement of the material part of the multistage axial compressor GTE-65.1. An approach to the mathematical description of cavities is described, consisting of four steps. This approach allows us to gradually determine the influence of the deviation on the characteristics of the compressor. For each of the four steps the integral characteristics of the compressor deviations in efficiency and the total pressure ratio are compared to the base geometry. The change in the stability of the compressor is analyzed, taking into account the cavities under consideration. The analysis of changes in the parameters of the compressor stages is carried out.

1. Ma Sh., Hu J., Wang X. [et al.]. Effect of Non-Uniformity of Rotor Stagger angle on the Stability of a Low-Speeds Axial Compressor // Energies. 2022. Vol. 15. 2714. P. 1–14. (In Engl.).

2. Hosseini M., Sun Z., He X. [et al.]. Effects of Radial Gap Ratio between Impeller and Vaned Diffuser on Performance of Centrifugal Compressors // Applied Sciences. 2017. Vol. 7 (7). 728. DOI: 10.3390/app7070728. (In Engl.).

3. Fernandez J. M. Oro, Perotti R. B., Vega M. G. [et al.]. Effect of the radial gap size on the deterministic flow in a centrifugal pump due to impeller-tongue interactions // Energy. 2023. Vol. 278 (3). 127820. DOI: 10.1016/j.energy.2023.127820. (In Engl.).

4. Rannou C., Marty J., Tanguy G. [et al.]. Effect of Tip Gap Size on the Performance of an Axial Compressor Stage with and without Active Flow Control // International Journal of Turbomachinery Propulsion and Power. 2023. Vol. 8 (3). 30. DOI: 10.3390/ijtpp8030030. (In Engl.).

5. Danish S. N., Qureshi Sh. R., Imran M. M. [et al.]. Effect of tip clearance and rotor–stator axial gap on the efficiency of a multistage compressor // Applied Thermal Engineering. 2016. Vol. 99. P. 988–995. (In Engl.).

6. Blinov V. L., Zubkov I. S. Influence of the axial compressor blade row defects on the industrial gas turbine performance // Journal of Physics: Conference Series. 2020. Vol. 1683. 042049. DOI: 10.1088/1742-6596/1683/4/042049. (In Engl.).

7. An G., Fan Zh., Qiu Y. [et al.]. Numerical Investigation of the Effect of Hub Gaps on the 3D Flows Inside the stator of a Highly Loaded Axial Compressor Stage // Energies. 2022. Vol. 15 (19). 6993. DOI: 10.3390/en15196993. (In Engl.).

8. Gazovyye turbiny sredney i bol’shoy moshchnosti [Medium and high capacity gas turbines] //silovyye mashiny. Power Machines. URL: https://power-m.ru/customers/thermal-power/gas-turbines/ (accessed: 10.11.2023). (In Russ.).

9. Wilcox D. C. Turbulence Modeling for CFD. 3rd ed. California, DCW Industries, Inc., 2006. 536 p. ISBN 978-1-928729-08-2. (In Engl.).

10. Kumar Avinash R., Shobhavathy M. T., Kumar A. R. Flow behaviour of transonic axial compressor stage with different turbulence models // Proceedings of the Forty Second National Conference on Fluid Mechanics and Fluid Power. December 14–16, 2015, NITK Surathkal, Karnataka, India. 2015. FMFP2015–PAPER NO.19. (In Engl.).

11. Sun W. Assessment of advanced RANS turbulence models for prediction of complex flows in compressors // Chinese Journal of Aeronautics. 2023. Vol. 36 (372). P. 162–177. DOI: 10.1016/j.cja.2023.06.007. (In Engl.).

12. Simões M. R., Montojos B. G., Moura N. R. [et al.]. Validation of turbulence models for simulation of axial flow compressor // 20th International Congress of Mechanical Engineering. November 15–20, 2009. Gramado, RS, Brazil. (In Engl.).

13. Körpe D. S., Kanat Ö. Ö., Oktay T. The Effects of Initial y plus: Numerical Analysis of 3D NACA 4412 Wing Using γ-Reθ SST Turbulence Model // Avrupa Bilim ve Teknoloji Dergisi. 2019. Vol. (17). P. 692–702. DOI: 10.31590/ejosat.631135. (In Engl.).