Results 11 to 20 of about 7,091 (256)
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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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
openaire +1 more source
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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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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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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Experimental study of the instationary flow between two ducted Counter-rotating rotors [PDF]
, 2013 The purpose of this work is to study experimentally the aerodynamic characteristics of a subsonic counter-rotating axial-flow fans system operating in a ducted configuration.
BAKIR, Farid +4 more
core +6 more sources
Time-domain harmonic balance method for aerodynamic and aeroelastic simulations of turbomachinery flows [PDF]
, 2013 A time-domain Harmonic Balance method is applied to simulate the blade row interactions and vibrations of state- of-the-art industrial turbomachinery configurations. The present harmonic balance approach is a time-integration scheme that turns a periodic
Besicovitch A.S. +5 more
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Intake ground vortex characteristics [PDF]
, 2011 The development of ground vortices when an intake operates in close proximity to the ground has been studied computationally for several configurations including front and rear quarter approaching flows as well as tailwind arrangements.
MacManus, David G. +2 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
doaj +1 more source