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Numerical simulation of unsteady aerodynamic interactions of contra-rotating axial fan. [PDF]
PLoS ONE, 2018 This paper describes the investigations performed to better understand unsteady effect that develop in a contra-rotating axial fan. More specifically, this study focuses on rotor-rotor interactions effects on unsteady characteristic and blade aerodynamic
Hengxuan Luan +2 more
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Influence of blade installation angle spanwise distribution on the energy characteristics of mining contra-rotating axial flow fan [PDF]
Scientific ReportsAs the global demand for energy conservation increases, achieving efficient energy conversion in fans has become a significant challenge in the field of mine ventilation.
Yongping Chen +7 more
doaj +5 more sources
Numerical investigation of differential speed operation of two impellers of contra-rotating axial-flow fan [PDF]
Advances in Mechanical Engineering, 2017 A contra-rotating axial-flow fan is prone to stalling and motor overload at partial flow rates. Moreover, its efficiency decreases sharply at a high flow rate, which is accompanied by disparity between the shaft powers of the two impellers and the light ...
Xiaobo Sun +3 more
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Frontiers in Physics, 2023 Introduction: In the present paper, experiments for a contra-rotating axial fan have been conducted to investigate the influences of the fan parameters including axial distance, blade number, blade pattern and blade thickness on the performance and noise
Yanjie Zhao +4 more
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Numerical study on aerodynamic noise performances of axial spacing in a contra-rotating axial fan [PDF]
Journal of Vibroengineering, 2016 In order to study the effect of axial spacing on behaviors of aerodynamic performance and aerodynamic noises in a contra-rotating fan, the steady/unsteady Reynolds-averaged Navier-Stokes equations are solved by the numerical method in conjunction with a SST turbulence model, and the effects of axial spacing on performance and aerodynamic ...
Hengxuan Luan +4 more
semanticscholar +5 more sources
Investigations on noise sources on a contra-rotating axial fan with different modifications [PDF]
E3S Web of Conferences, 2019 An Acoustic Camera was applied to examine modifications of fan blade designs regarding their noise emissions. A so-called rotational beamforming algorithm allows for the detection of sound sources on the rotating blades by using a virtual rotation of the
Krause Ralph +3 more
doaj +3 more sources
International Journal of Rotating Machinery, 2015 The present paper is an attempt in understanding the stall inception mechanism in a low speed, contra rotating axial flow fan stage, using wavelet transforms.
Tegegn Dejene Toge, A. M. Pradeep
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Experimental study on performance of contra-rotating axial flow fan [PDF]
International Journal of Coal Science & Technology, 2015 Contra-rotating axial flow fan is a kind of the vital equipment in coal mines. Their work conditions directly affect the safety of staff and production. In the paper, the performance of the contra-rotating axial flow fan is experimentally investigated. The study is focused on the fan performance, the shaft power and the match between the motor and fan ...
Shizhai Zhang
semanticscholar +4 more sources
Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan
International Journal of Aerospace Engineering, 2019 Because of the potential technical advantages, the contra-rotation technology has become a renewed interest in aviation and other applications. Contra-rotation increases efficiency in comparison with the single-rotor design, but this advantage is not ...
Hengxuan Luan +4 more
doaj +3 more sources
Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan
Applied SciencesTip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss.
Yongping Chen +3 more
doaj +3 more sources