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 axial spacing on stall development of FBCDZ-10-No20 mode contra-rotating fan [PDF]
Meitan kexue jishu, 2023 The rotating fan is prone to instability such as stall and even surge when operating at low flow rates. In order to study the influence of axial spacings on the stall inception and its development and propagation process of a contra-rotating fan , a ...
Qingguang CHEN +3 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
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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
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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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Effect of axial spacing on rotating stall performance of FBCDZ-10-No20 contra-rotating fan
Meitan kexue jishu, 2023 Mining contra-rotating fan are prone to rotational stall when it operates at low flow rates, which seriously affects the operational stability. The unsteady flow in the full flow passage of a FBCDZ-10-No20 contra-rotating fan at five axial spacings was ...
Qingguang CHEN +3 more
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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 ...
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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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Mechanism of irreversible energy loss in impeller of contra-rotating axial fan
Meitan xuebaoWith the urgent need of energy saving and consumption reduction in today's world, the topic of increasing the energy conversion efficiency of ventilation fans has been attracted a lot of attentions, it has become a key issue in the field of ventilation ...
Yongping CHEN +6 more
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Energy transfer process and evolution characteristics in impeller of contra-rotating axial fan
Meitan kexue jishuEnergy is transferred to the airflow during the rotation of impeller. In engineering, the efficient energy conversion is a key issue. Mastering the energy transfer process in impeller is the premise and basis for realizing efficient energy conversion. In
Yongping CHEN +5 more
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