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Entropy
Volume 25
Issue 3
10.3390/e25030433
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Article

Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System

by
Xingyu Jia
1,
Xi Zhang
1,*,
Kui Guo
1 and
Xuehui Li
2
1
School of Mechanical Electronic & Information Engineering, China University of Mining & Technology-Beijing, Ding No.11 Xueyuan Road, Haidian District, Beijing 100083, China
2
China North Vehicle Research Institute, Beijing 100072, China
*
Author to whom correspondence should be addressed.
Entropy 2023, 25(3), 433; https://doi.org/10.3390/e25030433
Submission received: 6 January 2023 / Revised: 26 February 2023 / Accepted: 27 February 2023 / Published: 1 March 2023
(This article belongs to the Special Issue Applications of CFD in Heat and Fluid Flow Processes)
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Abstract

Quantification of the loss generation of ducted contra-rotating fan (CRF) blades is difficult to achieve, since there are no guide vanes between rotors. A blade design program was established to investigate the relationship between radial velocity distribution and incurred loss. Numerical and experimental techniques were used to confirm the optimal configuration’s overall performance. The relationship between loss and velocity distribution under the impact of spanwise load distribution was confirmed by the entropy contour from various perspectives. The appropriate radial velocity distribution can improve the operating efficiency of a CRF by reducing the entropy around the annulus under design and near-stall conditions. This regularity could provide some strategies in the design of contra-rotating blades.
Keywords: radial velocity distribution; contra-rotating fan; entropy production; numerical simulation radial velocity distribution; contra-rotating fan; entropy production; numerical simulation

Share and Cite

MDPI and ACS Style

Jia, X.; Zhang, X.; Guo, K.; Li, X. Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System. Entropy 2023, 25, 433. https://doi.org/10.3390/e25030433

AMA Style

Jia X, Zhang X, Guo K, Li X. Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System. Entropy. 2023; 25(3):433. https://doi.org/10.3390/e25030433

Chicago/Turabian Style

Jia, Xingyu, Xi Zhang, Kui Guo, and Xuehui Li. 2023. "Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System" Entropy 25, no. 3: 433. https://doi.org/10.3390/e25030433

APA Style

Jia, X., Zhang, X., Guo, K., & Li, X. (2023). Effect of the Radial Velocity Distribution on the Loss Generation of a Contra-Rotating Fan in a Ventilation System. Entropy, 25(3), 433. https://doi.org/10.3390/e25030433

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