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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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Limits of Rotating Stall and Stall in Vaneless Diffuser of Centrifugal Compressors [PDF]
Volume 1A: General, 1978 Based on the theory in Reference (3), the flow behavior is predicted in four vaneless diffusers with different geometries at the flow rates just before rotating stall and just before stall, which have been experimentally determined. Since the predicted velocity distributions at the critical conditions are physically reasonable for rotating stall and ...
Y. Senoo, Y. Kinoshita
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International Journal of Rotating Machinery, 2003 We carried out investigations for the purpose of clarifying the rotor outlet flow fields with rotating stall cell in a diagonal-flow fan. The test fan was a high–specific-speed (ns=1620) type of diagonal-flow fan that had 6 rotor blades and 11 stator ...
Norimasa Shiomi +4 more
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Stability Enhancement and Noise Reduction of an Axial Compressor with Foam Metal Casing Treatment
Aerospace, 2022 Foam metal is a foam-like substance with a high porosity; it has been used in flow control, vibration abatement, and acoustic absorption, mainly based on its physical properties.
Jia Li +5 more
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Dynamic Characteristics of Rotating Stall in Mixed Flow Pump
Journal of Applied Mathematics, 2013 Rotating stall, a phenomenon that causes flow instabilities and pressure hysteresis by propagating at some fraction of the impeller rotational speed, can occur in centrifugal impellers, mixed impellers, radial diffusers, or axial diffusers.
Xiaojun Li +4 more
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An insight into the rotational stall delay [PDF]
PAMM, 2012 AbstractBlade element momentum (BEM) theory which is based on the two‐dimensional (2D) aerodynamic properties of airfoil blade element is the most common computational engineering method for the prediction of loads and power curves of wind turbines. Although most BEM models yield acceptable results for high tip‐speed ratios where the local angles of ...
Horia Dumitrescu +2 more
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Two-Dimensional Rotating Stall Analysis in a Wide Vaneless Diffuser
International Journal of Rotating Machinery, 2006 We report a numerical study on the vaneless diffuser core flow instability in centrifugal compressors. The analysis is performed for the purpose of better understanding of the rotating stall flow mechanism in radial vaneless diffusers. Since the analysis
S. Ljevar +2 more
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Design of a Compressor Test Rig for Immobilization of the Stall Cell
Applied SciencesCapturing internal flow experimentally presents significant challenges due to the asymmetric propagation and strong unsteadiness of a stall cell in the circumferential direction.
Qian Zhang, Guangfeng An
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International Journal of Rotating Machinery, 2017 The transition process from a diffuser rotating stall to a stage stall in a centrifugal compressor with a vaned diffuser was investigated by experimental and numerical analyses. From the velocity measurements, it was found that the rotating stall existed
Nobumichi Fujisawa, Yutaka Ohta
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Nihon Kikai Gakkai ronbunshu, 2021 Unsteady diffuser stall behavior in a centrifugal compressor with a vaneless diffuser was investigated by experimental and computational analyses. The diffuser stall generated as the mass flow rate decreased. The diffuser stall cell rotated at 25-30 % of
Nobumichi FUJISAWA +3 more
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