Results 11 to 20 of about 7,132 (267)
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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Design of a two spool contra-rotating turbine for a turbo-fan engine
Propulsion and Power Research, 2020 Contra-rotating turbines offer enhanced performance over their conventional co-rotating configurations. In addition, vaneless contra-rotating turbine stages offer lesser stage length along with improved performance.
Prathapanayaka Rajeevalochanam +3 more
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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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Advances in Mechanical Engineering, 2016 The contra-rotating fan is an electromechanical device in which electromagnetic force and aerodynamic force coordinate together. Its operation process is affected by multiple factors and is also coupled with multiple variables. In order to further reveal
Qian Wang, Dawei Meng
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Influence of axial spacing on stall development of FBCDZ-10-No20 mode contra-rotating fan
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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The Acoustical Behavior of Contra-Rotating Fan [PDF]
Mathematical Problems in Engineering, 2018 The noise produced by a contra-rotating ventilator can cause injury to humans. Therefore, it is important to reduce noise caused by ventilators. In this study, the Ffowcs Williams and Hawkings (FW-H) model was used to simulate the acoustics of four different axial impeller spacing points based on the unsteady flow field through a FBD No.
Juan Wu, Ziming Kou, Jing Liu
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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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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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Design and Experimental Validation of a Ducted Counter-rotating Axial-flow Fans System [PDF]
, 2012 An experimental study on the design of counter-rotating axial-flow fans was carried out. The fans were designed using an inverse method. In particular, the system is designed to have a pure axial discharge flow.
Bakir +21 more
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Experimental investigation on ducted counter-rotating axial flow fans [PDF]
, 2011 An experimental study on counter-rotating axial-flow fans was carried out. The fans of diameter D = 375 mm were designed using an inverse method. The counter-rotating fans operate in a ducted-flow configuration and the overall performances are measured ...
BAKIR, Farid +3 more
core +3 more sources