The influence of the honeycomb diameter and straightener length on performance was investigated. Velocity profiles were measured using a hot-wire anemometer, and pressure losses were also recorded. The straighteners were placed 10D downstream of the fan. Measurements were conducted at Reynolds numbers of 10000, 15000, 30000, 45000. Additionally, two methods were proposed to assess the influence of straighteners on the shape of the velocity profile. The results showed that at Reynolds numbers of 10000 and 15000, straighteners had only a minor effect on reducing turbulence intensity and relaminarizing the velocity profile. In contrast, at higher Reynolds numbers, their impact
was significant.
REFERENCES(25)
1.
Asker, M., Turgut, O.E., & Coban, M.T. (2014). A review of non iterative friction factor correlations for the calculation of pressure drop in pipes. Bitlis Eren University Journal of Science and Technology, 4 (1), 1–8. https://dergipark.org.tr/tr/do...
Bradshaw, P. (1965). The effect of wind-tunnel screens on nominally two-dimensional boundary layers. Journal of Fluid Mechanics, 22 (4), 679–687. https://doi.org/10.1017/S00221....
Dróżdż, A., Sokolenko, V., & Elsner, W. (2025). Performance analysis of novel wavy-wall-based flow control method for wind turbine blade. Experimental Thermal and Fluid Science, 169, Article 111527. https://doi.org/10.1016/j.expt....
Dutta, P., Rajendran, N.K., Cep, R., Kumar, R., Kumar, H., & Nirsanametla, Y. (2025). Numerical investigation of Dean vortex evolution in turbulent flow through 90◦ pipe bends. Frontiers in Mechanical Engineering, 11. https://doi.org/10.3389/fmech.....
Hamzah, H., Jasim, L.M., Alkhabbaz, A., & Sahin, B. (2021). Role of honeycomb in improving subsonic wind tunnel flow quality: Numerical study based on orthogonal grid. Journal of Mechanical Engineering Research and Developments, 44 (7), 352–369.
Hrúz, M., Pecho, P., & Bugaj, M. (2020). Design procedure and honeycomb screen implementation to the Air Transport Department’s subsonic wind tunnel. AEROjournal, 16 (2), 3–8. https://doi.org/10.26552/aer.C....
International Organization for Standardization. (2022). Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full – Part 1: General principles and requirements (ISO Standard No. 5167-1:2022). https://www.iso.org/standard/7....
Jurga, A.P., Janocha, M.J., Ong, M.C., & Yin, G. (2024). Numerical investigations of turbulent flow through a 90-degree pipe bend and honeycomb straightener. Journal of Fluids Engineering, 146 (2), Article 021307. https://doi.org/10.1115/1.4064....
Kaminski, K., Znaczko, P., Kardas-Cinal, E., Chamier-Gliszczynski, N., Koscielny, K., & Cur, K. (2025). Comparison of the heat transfer efficiency of selected counterflow air-to-air heat exchangers under unbalanced flow conditions. Energies, 18 (1), Article 117. https://doi.org/10.3390/en1801....
Klotz, L., Bukowski, K., & Gumowski, K. (2024). Influence of porous material on the flow behind a backward-facing step: experimental study. Journal of Fluid Mechanics, 998, Article A31. https://doi.org/10.1017/jfm.20....
Kühnen, J., Scarselli, D., Schaner, M., & Hof, B. (2018). Relaminarization by steady modification of the streamwise velocity profile in a pipe. Flow, Turbulence and Combustion, 100 (4), 919–943. https://doi.org/10.1007/s10494....
Lumley, J.L., & McMahon, J.F. (1967). Reducing water tunnel turbulence by means of a honeycomb. Journal of Basic Engineering, 89 (4), 764–770. https://doi.org/10.1115/1.3609...
Marensi, E., Willis, A.P., & Kerswell, R.R. (2019). Stabilisation and drag reduction of pipe flows by flattening the base profile. Journal of Fluid Mechanics, 863, 850–875. https://doi.org/10.1017/jfm.20....
Salama, A. (2021). Velocity profile representation for fully developed turbulent flows in pipes: A modified power law. Fluids, 6 (10), Article 369. https://doi.org/10.3390/fluids....
Smyk, E., Stopel, M., & Szyca, M. (2024). Simulation of flow and pressure loss in the example of the elbow. Water, 16 (13), Article 1875. https://doi.org/10.3390/w16131....
Sun, K., Sun, J., Fan, Y., Yu, L., Chen, W., Kong, X., & Yu, C. (2023). Characterization of a synthetic jet vortex ring flowing through honeycomb. Physics of Fluids, 35 (7), Article 075123. https://doi.org/10.1063/5.0155....
Sun, K., Zhang, S., Shi, N., Peng, S., Cao, J., Sun, J., & Chen, W. (2025). Experimental investigation of synthetic jet impingement upon a honeycomb. European Journal of Mechanics - B/Fluids, 111, 319–333. https://doi.org/10.1016/j.euro....
Tan-Atichat, J., Nagib, H.M., & Loehrke, R.I. (1982). Interaction of free-stream turbulence with screens and grids: a balance between turbulence scales. Journal of Fluid Mechanics, 114, 501–528. https://doi.org/10.1017/S00221....
Teleszewski, J.T. (2018). Experimental investigation of the kinetic energy correction factor in pipe flow. E3S Web of Conferences, 44, Article 00177. https://doi.org/10.1051/e3scon....
Xiong, W., Kalkühler, K., & Merzkirch, W. (2003). Velocity and turbulence measurements downstream of flow conditioners. Flow Measurement and Instrumentation, 14 (6), 249–260. https://doi.org/10.1016/S0955-....
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