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A fully reversible axial fan with two contra-rotating impellers [PDF]

, 2022
The objective of this paper is the design, manufacture and test of a fully reversible axial fan. The fundamental layout of the fan chosen consists of two identical contra-rotating impellers without guide vanes, placed in mirror image to each other in a duct-type housing.
Bamberger, Konrad, Klenk, Maximilian, Carolus, Thomas   +2 more
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Unsteady flow condition of contra-rotating small-sized axial fan

Journal of Thermal Science, 2011
Small-sized axial fans are used as air cooler for electric equipments. But there is a strong demand for higher power of fans according to the increase of quantity of heat from electric devices. Therefore, higher rotational speed design is conducted, although, it causes the deterioration of efficiency and the increase of noise.
T. Shigemitsu, J. Fukutomi, Y. Okabe, K. Iuchi, H. Shimizu   +4 more
openaire   +1 more source

Internal Flow Conditions of Contra-Rotating Small-Sized Axial Fan

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2011
Small-sized axial fans are used as air cooler for electric equipments. But there is a strong demand for higher power of fans according to the increase of quantity of heat from electric devices. Therefore, higher rotational speed design is conducted, although, it causes the deterioration of efficiency and the increase of noise.
Toru Shigemitsu, Junichiro Fukutomi, Yuki Okabe, Kazuhiro Iuchi   +3 more
openaire   +1 more source

Flow Studies in Ducted Twin-Rotor Contra-Rotating Axial Flow Fans

Volume 1: Turbomachinery, 1992
The design and testing of a 400 mm diameter contra-rotating fan unit was undertaken to study the flow behavior through the contra-rotating fans, and to find ways and means of improving their design and performance. The performance characteristics of the two-fan unit have shown that large overall stall margins can be achieved.
Bhaskar Roy, K. Ravibabu, P. Srinivasa Rao, S. Basu, A. Raju, P. N. Murthy   +5 more
openaire   +1 more source

Effect of Tandem Blading in Contra-Rotating Axial Flow Fans

Volume 2A: Turbomachinery, 2018
With the ever-increasing demand for improved fuel efficiency and lower emissions, there is a significant emphasis on finding innovative design solutions that can replace or significantly improve the present-day turbomachinery designs. The concepts of contra-rotation and tandem blade configuration are two different methods of achieving better ...
Manas Madasseri Payyappalli, A. M. Pradeep   +1 more
openaire   +1 more source

Performance and Flow Conditions of Contra-Rotating Small-Sized Axial Fan

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C, 2010
Small-sized axial fans are used as air cooler for electric equipments. But there is a strong demand for higher power of fans according to the increase of quantity of heat from electric devices. Therefore, higher rotational speed design is conducted although, it causes the deterioration of efficiency and the increase of noise.
Toru Shigemitsu, Junichiro Fukutomi, Yuki Okabe, Kazuhiro Iuchi   +3 more
openaire   +1 more source

Pre-Stall Waves: Precursors to Stall Inception in a Contra-Rotating Axial Fan

Volume 2E: Turbomachinery, 2020
Abstract Stall in a compressor or a fan is often associated with pre-stall waves, that could act as precursors. The present study aims to understand in detail the pre-stall waves leading to instabilities in a low aspect ratio, low hub-tip ratio contra-rotating axial fan.
Manas Madasseri Payyappalli, A. M. Pradeep   +1 more
openaire   +1 more source

Parameterized modeling of contra-rotating axial flow fan based on SolidWorks

International Conference on Software Intelligence Technologies and Applications & International Conference on Frontiers of Internet of Things 2014, 2014
A parametric modelling method of contra-rotating axial flow fan based on SolidWorks is presented in order to increase its modelling efficiency. The coordinates' transformation is developed, by which two-dimensional cross-section parameters of fan blade are transformed to three-dimensional spaces.
null Xiaobo Sun, null Yu Han, null Qian Wang, null Dawei Meng   +3 more
openaire   +1 more source