Results 11 to 20 of about 811 (268)
Single and Multiple Circumferential Casing Groove for Stall Margin Improvement in a Transonic Axial Compressor [PDF]
Volume 2A: Turbomachinery, 2020 Abstract The stability limit of a tip-stalling axial compressor is sensitive to the magnitude of the near casing blockage. In transonic compressors, the presence of the passage shock could be a major cause for the blockage. Identification and elimination of this blockage could be key to improving the stability limit of the compressor. In
Bin Mustaffa, A F, Kanjirakkad, V
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Pulsed Air Injection System Characterization for Stall Margin Improvement in an Axial Compressor [PDF]
, 2022 This paper presents the design and the characterization of a pulsed air injection system on a single stage axial compressor. The goal of this system is to delay the rotating stall onset and to extend the compressor operating range. The proposed control system consists in 20 injection blocks of 2 injectors, allowing to adjust some of the fluidic and ...
Margalida, Gabriel +4 more
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Improvement of Moderately Loaded Transonic Axial Compressor Performance Using Low Porosity Bend Skewed Casing Treatment [PDF]
International Journal of Rotating Machinery, 2014 This paper presents experimental results of a single stage transonic axial flow compressor coupled with low porosity bend skewed casing treatment. The casing treatment has a plenum chamber above the bend slots.
Dilipkumar Bhanudasji Alone +6 more
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Proceedings of Global Power & Propulsion Society, 2020 The stall margin of tip-critical axial compressors can be improved by using circumferential casing grooves. From previous studies, in the literature, the stall margin improvement due to the casing grooves can be attributed to the reduction of the near casing blockage.
Ahmad Fikri Mustaffa +1 more
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Passive casing treatments for stall margin improvement in axial compressors
, 2020 Axial flow compressors are mainly used in the power generation and aerospace industry. Axial compressors are prone to instability issues since it is the nature of compressors to impart work on a fluid across an adverse pressure gradient. Instability in the compressor will instigate rotating stall and ultimately surge within the compression system.
Ahmad Fikri bin Mustaffa, Ahmad Fikri bin Mustaffa
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AerospaceIn this paper, a numerical optimization study of single-groove casing treatment was conducted on a high-speed axial compressor. One of the aims is to find the optimal structure of a single groove that can improve compressor stability with minimal loss in
Wenhao Liu +3 more
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A Study of Casing Treatment Stall Margin Improvement Phenomena [PDF]
Volume 1A: General, 1975 The results of a program of experimental and analytical research in casing treatments over axial compressor rotor blade tips are presented. Circumferential groove, axial-skewed slot, and blade angle slot treatments were tested at low speeds. With the circumferential groove treatment the stalling flow was reduced 5.8 percent at negligible efficiency ...
D. C. Prince +2 more
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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
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Effect of Different Radial Inclined Angles of Self-circulation Casing Treatment on the Transonic Axial Flow Compressor Performance [PDF]
Journal of Applied Fluid Mechanics, 2023 Unsteady numerical simulation of single passage was carried out on NASA Rotor 35 to study the influence of the radial inclined angle of self-circulation casing treatment (SCT) on the performance and stability of a transonic compressor at 100% design ...
H. Zhang +4 more
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Aerospace, 2023 In this paper, unsteady characteristics of a modified vaned-recessed casing treatment with 23.2% rotor blade tip axial chord exposure were studied numerically.
Mohammad Akhlaghi, Yahya Azizi
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