...Dakun Sun; Jiahao Hu; Ruize Xu; Jia Li; Xu Dong; Dengke Xu; Xiaofeng Sun A resolvent analysis framework for the axial compressor is established, and the impedance optimization is achieved based on the resolvent analysis framework for the impedance boundary condition casing treatment. This framework...

...Sungho Yoon; Patricia Cargill Casing treatment is an advanced design feature intended to improve the stability of a compressor. Various investigations have been conducted based on both experimental and numerical studies at least over the last 50 years. In general, it has been demonstrated...

...Chunill Hah A compressor casing treatment with circumferential casing grooves (CCGs) is studied in detail. The primary objective of the current paper is to unearth the main driving fluid mechanism that changes the stall margin in a transonic compressor with CCGs. Large eddy simulation (LES...

...Matthew K. Oldfield; Alejandro Castillo Pardo; Cesare A. Hall Casing treatments are used to extend the stability margin of fans or compressors. These typically have an axisymmetric arrangement, but for a fan exposed to non-axisymmetric distortion, a casing treatment applied to a fraction...

...Dakun Sun; Jia Li; Xu Dong; Ruize Xu; Xiaofeng Sun A set of foam metal casing treatment (FMCT) has been investigated to assess the stability improvement and noise reduction on an axial compressor. Three FMCTs with different PPI (Pores Per Inch), 20, 35, and 50, are tested experimentally. Two...

... casing treatment Computational fluid dynamics (CFD) is being widely used to simulate the flow in turbomachines [ 1 – 4 ]. Reynolds-averaged Navier–Stokes (RANS) simulations with different closure models for the Reynolds stresses are the most popular due to the low computational cost. Questions...

..., Malaysia. Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 15 11 2020 29 01 2021 01 02 2021 19 04 2021 stall margin improvement axial compressor casing treatment compressor stall...

.... A separation of the rotor suction side boundary layer is also observed at near stall conditions. Then, two approaches are tested in order to control these flows in the tip region. The first one is a casing treatment with nonaxisymmetric slots. The method showed a good ability to control the tip leakage flow...

...R. Emmrich; H. Hönen; R. Niehuis A casing treatment with axial and radial skewed slots ending in a plenum chamber has experimentally been investigated at a highly subsonic axial compressor stage. The aim was to investigate the physical phenomenon of this treatment family that is responsible...

...Xingen Lu; Wuli Chu; Junqiang Zhu; Yangfeng Zhang In order to advance the understanding of the fundamental mechanisms of axial skewed slot casing treatment and their effects on the subsonic axial-flow compressor flow field, the coupled unsteady flow through a subsonic compressor rotor and the axial...