Results 1 to 10 of about 558 (118)
Dynamic System Stability Modeling Approach with Sparrow-Inspired Meta-Heuristic Optimization Algorithm [PDF]
Biomimetics, 2023 Aiming at the accurate prediction of the inception of instability in a compressor, a dynamic system stability model is proposed based on a sparrow-inspired meta-heuristic optimization algorithm in this article.
Tianqi Xia +2 more
doaj +2 more sources
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
doaj +1 more source
AIP Advances, 2023 This paper aims at the numerical analysis of the influence of tip clearance size on the pre-stall flow features of a transonic high-speed compressor by applying the throttle model at the exit of the compressor computational domain.
Khalid Kamal Abdelbagi
doaj +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
doaj +1 more source
Estimations of Compressor Stall and Surge Using Passage Stall Behaviors
Machines, 2022 The predictions of the onset of rotating stall and surge are very important in the preliminary design stage of a compressor. Rotating stall and surge are complex instabilities that cause efficiency loss and reduced pressure rise, and, therefore ...
Mohammad Akhlaghi +2 more
doaj +1 more source
Propulsion and Power Research, 2023 Based on the sample entropy algorithm in nonlinear dynamics, an improved sample entropy method is proposed in the aerodynamic system instability identification for the stall precursor detection based on the nonlinear feature extraction algorithm in an ...
Mingming Zhang +5 more
doaj +1 more source
Nihon Kikai Gakkai ronbunshu, 2023 Using a high-speed multistage scale model compressor simulating a middle stage of a gas turbine compressor for power generation, the effects of 3 types of rotor tip clearances on performance and operating range, and the vortex structure of rotor tip ...
Ryosuke SEKI
doaj +1 more source
Aerospace, 2021 This work focuses its attention on possibilities to enhance the stability of an axial compressor using a casing treatment technique. Circumferential grooves machined into the case are considered and their performances evaluated using three-dimensional ...
Marco Porro +2 more
doaj +1 more source
Applied Sciences, 2017 Axial compressors in aero engines are prone to suffering a breakdown of orderly flow when operating at the peak of the pressure rise characteristic. The damaging potential of separated flows is why a safe distance has to be left between every possible ...
Mario Eck, Silvio Geist, Dieter Peitsch
doaj +1 more source
A stall diagnosis method based on entropy feature identification in axial compressors
International Journal of Mechanical System Dynamics, 2023 A stall diagnosis method based on the entropy feature extraction algorithm is developed in axial compressors. The reliability of the proposed method is determined and a parametric sensitivity analysis is experimentally conducted for two different types ...
Yang Liu +5 more
doaj +1 more source