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Internal Flow Condition between Front and Rear Rotor of Contra-Rotating Small-Sized Axial Fan at Low Flow Rate

DOI: 10.4236/ojfd.2017.74046, PP. 709-723

Keywords: Small-Sized Axial Fan, Contra-Rotating Rotors, Wake, Potential Interference, Numerical Analysis

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Abstract:

Contra-rotating small-sized fans are used as cooling fans for electric equipment. The internal flow condition between the front and rear rotors of the contra-rotating small-sized fan is not known well especially at the low flow rate. Furthermore, the blade row distance between the front and rear rotors is an important parameter for the contra-rotating small-sized fan and its influence on the internal flow condition is not clarified at the low flow rate. Therefore, the internal flow condition of the contra-rotating small-sized fan at the low flow rate is investigated by the numerical analysis in this research. The numerical analysis results are validated by comparing the fan static pressure curves of the numerical results to the experimental results. The internal flow condition at the low flow rate is clarified using the numerical models of the different blade row distance L = 10 mm and 30 mm. In the present paper, pressure fluctuations phase locked each front and rear rotor’s rotation are shown and the influences of the wake and the potential interference are discussed by the unsteady numerical analysis results at the low flow rate.

References

[1]  Furukawa, A., Shigemitsu, T. and Watanabe, S. (2007) Performance Test and Flow Measurement of Contra-Rotating Axial Flow Pump. Journal of Thermal Science, 16, 7-13.
https://doi.org/10.1007/s11630-007-0007-4
[2]  Furukawa, A., Cao, Y., Okuma, K. and Watanabe, S. (2000) Experimental Study of Pump Characteristics of Contra-Rotating Axial Flow Pump. Turbomachinery, 67, 245-252.
[3]  Nouri, H., Ravelet, F., Bakir, F., Sarraf, C. and Rey, R. (2012) Design and Experimental Validation of a Ducted Counter-Rotating Axial-Flow Fans System. Journal of Fluids Engineering, 134, Article ID: 104504.
https://doi.org/10.1115/1.4007591
[4]  Shigemitsu, T., Furukawa, A., Okuma, K. and Watanabe, S. (2002) Experimental Study on Rear Rotor Design in Contra-Rotating Axial Flow Pump. Proceedings of 5th JSME/KSME Fluids Engineering Conference, Nagoya, 17-21 November 2002, 1453-1548.
[5]  Wang, C. and Huang, L. (2014) Passive Noise Reduction for a Contrarotating Fan. Journal of Turbomachinery, 137, Article ID: 031007.
https://doi.org/10.1115/1.4028357
[6]  Sanders, A.J., Papalia, J. and Fleeter, S. (2002) Multi-Blade Row Interactions in a Transonic Axial Compressor: Part I—Stator Particle Image Velocimetry (PIV) Investigation. Journal of Turbomachinery, 124, 10-18.
https://doi.org/10.1115/1.1411973
[7]  Nouri, H., Danlos, A., Ravelet, F., Bakir, F. and Sarraf, C. (2013) Experimental Study of the Instationary Flow between Two Ducted Counter-Rotating Rotors. Journal of Engineering for Gas Turbines and Power, 135, Article ID: 022601.
https://doi.org/10.1115/1.4007756
[8]  Shigemitsu, T., Fukutomi, J. and Okabe, Y. (2010) Performance and Flow Condition of Small-Sized Axial Fan and Adoption of Contra-Rotating Rotors. Journal of Thermal Science, 19, 1-6.
https://doi.org/10.1007/s11630-010-0001-0
[9]  Shigemitsu, T., Fukuda, H. and Hirosawa, K. (2017) Unsteady Flow Condition between Front and Rear Rotor of Contra-Rotating Small Sized Axial Fan. Open Journal of Fluid Dynamics, 7, 371-385. https://doi.org/10.4236/ojfd.2017.73025
[10]  Liu, S., Huang, R. and Lin, C. (2010) Computational and Experimental Investigations of Performance Curve of an Axial Flow Fan Using Downstream Flow Resistance Method. Experimental Thermal and Fluid Science, 34, 827-837.
https://doi.org/10.1016/j.expthermflusci.2010.01.011
[11]  Jin, G., Ouyang, H. and Du, Z. (2013) Experimental Investigation of Unsteady Flow in Axial Skewed Fans According to Flow Rates. Experimental Thermal and Fluid Science, 48, 81-96.
https://doi.org/10.1016/j.expthermflusci.2013.02.011
[12]  Shigemitsu, T., Fukutomi, J., Okabe, Y. and Iuchi, K. (2010) Performance and Flow Condition of Contra-Rotating Small-Sized Axial Fan at Partial Flow Rate. International Journal of Fluid Machinery and Systems, 3, 271-278.
https://doi.org/10.5293/IJFMS.2010.3.4.271
[13]  Ito, T., Minorikawa, G., Nagamatsu, A. and Suzuki, S. (2006) Experimental Research for Performance and Noise of Small Axial Flow Fan (Influence of Parameter of Blade). Transactions of the JSME, 72, 670-667. (In Japanese)
https://doi.org/10.1299/kikaib.72.670

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