New Method of Adjusting Flow Parameters of Axial Fans

P. Odyjasa, I. Kuricb, M. Mackoc, D. Pietrusiaka, M. Sagab, A. Szczepańczykc, Z. Szczepańskic, M. Śliwińskic, K. Urbańskid, M. Vlaskob, J. Więckowskia, P. Moczkoa aWroclaw University of Science and Technology, Faculty of Mechanical Engineering, Łukasiewicza 7/9, 50-371 Wrocław, Poland bUniversity of Žilina, Faculty of Mechanical Engineering, Univerzitná 8215/1, 010 26 Žilina, Slovakia cKazimierz Wielki University, Faculty of Mechatronics, Kopernika 1, 85-074 Bydgoszcz, Poland dELMINE sp. z o.o., Wierzbowa 7, 67-200 G log ów, Poland

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The paper presents numerical investigations of a new method of regulation of an axial fan. This method is based on dividing the impeller blade and stator guide vane into two parts, i.e., fixed and movable. The proposed new method was compared with a reference fan, in which the system with whole movable blade regulation is applied. Flow simulations aimed at the evaluation of the regulation characteristic of both solutions. The results showed that the new regulation method has a wider regulation control parameter, with values 10.2% and 12.2% higher for flow and pressure, respectively, than those of the reference fan. The drawback of the new idea is the restricted regulation range in the case of higher flows and pressures, which results from growing fluid flow losses. The obtained results suggest that the optimal regulation method would be a combination of the two approaches considered in the project. It means that an impeller with whole regulation blade and a stator guide vane with movable front part should have better performance.

DOI:10.12693/APhysPolA.149.S81 topics: axial fan, fan regulation method, numerical methods, computational fluid dynamics (CFD) simulation