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 +2 more sources
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 +2 more sources
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
doaj +2 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 +2 more sources
A contra-rotating marine current turbine on a flexible mooring : development of a scaled prototype [PDF]
, 2008 The contra-rotating marine current turbine concept developed by the Energy Systems Research Unit at the University of Strathclyde is aimed at extracting energy in a wide range of water depths by 'flying' a neutrally-buoyant device from a flexible ...
Clarke, Joe +4 more
core +3 more sources
Contra-rotating marine current turbines : performance in field trials and power train developments [PDF]
, 2008 Development of a novel contra-rotating marine current turbine has been continuing at the University of Strathclyde. Continuous monitoring of blade bending loads during trials has enabled an investigation of blade-blade and blade-structure interactions ...
Clarke, Joseph Andrew +5 more
core +3 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 +1 more source
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.
NOURI, Hussain +9 more
core +1 more source
Development and in-sea performance testing of a single point mooring supported contra-rotating tidal turbine [PDF]
, 2009 This paper discusses the development and in-sea performance testing of a single point mooring supported contra-rotating tidal turbine.
Conno, G. +3 more
core +5 more sources
Influence of design parameters on the global performances of low-speed counter-rotating axial-flow fans [PDF]
, 2014 The present work aims at experimentally investigating the effects of some parameters on the performances of a counter-rotating stage, and on the instationary flow between the rotors.
BAKIR, Farid +5 more
core +1 more source