Results 11 to 20 of about 4,545 (167)
Internal Flow Condition of High Power Contra-Rotating Small-Sized Axial Fan [PDF]
International Journal of Fluid Machinery and Systems, 2013 Data centers have been built with spread of cloud computing. Further, electric power consumption of it is growing rapidly. High power cooling small-sized fans; high pressure and large flow rate small-sized fan, are used for servers in the data centers and there is a strong demand to increase power of it because of increase of quantity of heat from the ...
Toru Shigemitsu +2 more
semanticscholar +4 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 +4 more sources
Aeronautical Journal, 2022 Prediction of stall before it occurs, or detection of stall is crucial for smooth and lasting operation of fans and compressors. In order to predict the stall, it is necessary to distinguish the operational and stall regions based on certain parameters ...
A. Kumar, M. Manas, A. Pradeep
semanticscholar +3 more sources
Experimental and numerical investigation of endwall flow control through air injection in a contra rotating fan [PDF]
Scientific ReportsThis study reports on an experimental and numerical investigation of tip leakage flow control and its effects on the endwall flow structure and stall evolution of a contra-rotating fan.
Maryam Sadoddin, Hossein Khaleghi
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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
doaj +2 more sources
Numerical analysis of noise characteristics of a contra-rotating axial fan
IOP Conference Series: Earth and Environmental Science, 2012 Numerical analysis of the flow-field in a contra-rotating fan has been performed by using the CFD method. The LES technique is applied to simulate the 3D unsteady whole flow-field of the fan. Several monitoring faces are specified in the flow-field between the two impellers.
F Fang, Q G Chen
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Sound source localisation at an axial contra-rotating fan by means of PIV and rotational beamforming [PDF]
European Conference on Turbomachinery Fluid Dynamics and hermodynamics, 2019 This paper describes the investigation of a contra-rotating axial fan. It has a shroud diameter of 300 mm and a rotational speed of 1920 min-1 and 1200 min-1 for the first and the second impeller, respectively. It is designed for an air-flow rate of 0.486 m3s-1 and for total pressure difference of 180 Pa (120 Pa at the first and 60 Pa at the second ...
Christian Friebe +3 more
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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
doaj +2 more sources
Unsteady Flow Condition between Front and Rear Rotor of Contra-Rotating Small Sized Axial Fan
Open Journal of Fluid Dynamics, 2017 Contra-rotating small-sized axial fans are used as cooling fans for electric equipment. In the case of the contra-rotating rotors, the blade row distance between front and rear rotors is a key parameter for the performance and stable operation. The wake and potential interference occur between the front and rear rotors and leakage flow from the ...
Toru Shigemitsu +2 more
openaire +3 more sources