Results 21 to 30 of about 32,011 (293)
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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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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Stability of Fully Developed Rotating Stall [PDF]
Volume 1: Turbomachinery, 1992 In [McCaughan, 1989b] it was observed that the slopes of both the axisymmetric and rotating stall characteristics play a major role in determining the mode of instability of the engine and the recovery point. That analysis was carried out for the grossly simplified model where the stall cell was considered as a travelling sine wave.
F. E. McCaughan, Hong Xiao Xue
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Tip-Clearance Actuation With Magnetic Bearings for High-Speed Compressor Stall Control [PDF]
, 2000 Magnetic bearings are widely used as active suspension devices in rotating machinery, mainly for active vibration control purposes. The concept of active tip clearance control suggests a new application of magnetic bearings as servo-actuators to ...
Bright, M. M. +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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Rotating stall and surge control: a survey [PDF]
Proceedings of 1995 34th IEEE Conference on Decision and Control, 2002 The paper presents an analysis of the current state of the art in the control of aero- or hydrodynamic instabilities in turbomachines. It describes the flow phenomena associated with rotating stall and surge, discusses methods devised to prevent these instabilities occuring, but concentrates mainly on the active control (stabilization) of the unstable ...
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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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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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Alternate Blade Stall and Rotating Stall in a Vaned Diffuser
JSME International Journal Series B, 2002 Flow instability in a vaned diffuser with an even number of blades was examined experimentally and analytically. In the experiments, an alternate blade stall, an asymmetric stall, and two types of rotating stalls (backward/forward rotating stall) were observed depending on the impeller/diffuser clearance.
Takeshi SANO +3 more
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