... compressors and pumps compressor stall surge operability computational fluid dynamics (CFD) The rapid growth of computer power, and advancements in numerical techniques have made computational fluid dynamics (CFD) methods powerful and essential tools for modeling turbomachinery flows...

...Julien Marty; Lionel Castillon; Pierric Joseph The operating range of a compressor is limited by surge or rotating stall line, among others. Numerical simulations must accurately predict these phenomena. This study is based on the experimental compressor CME2, which is a low-subsonic axial...

... represent stall points for compressors with solidities of 1.0 and 2.0, respectively. A blade stall is expected for point A, whereas a wall stall is expected for point B. Fig. 13 Blade and wall limitations on blade row operation [ 35 ]: σ is the solidity, φ is the flow coefficient, Δ p...

...Zoltán S. Spakovszky Many of the challenges that limited aero-engine operation in the 1950s, 1960s, 1970s, and 1980s were static in nature: hot components exceeding temperature margins, stresses in the high-speed rotating structure approaching safety limits, and turbomachinery aerodynamic...

... operating range, equivalent to 2% of nozzle area. Overall, the fan design tolerates the sideslip distortion well and demonstrates the importance of the coupling of both swirl and total pressure distortion with the fan aerodynamics. The upstream flow redistribution, described earlier, effectively rotates...

... by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 16 07 2022 21 08 2022 22 08 2022 19 09 2022 casing treatment compressor stall surge operability Non-uniform flow at the inlet to a turbofan engine degrades...

...Yannick Bousquet; Nicolas Binder; Ludovic Rojda; Adrien Thacker The present work analyzes the three-dimensional unsteady flow structure of a low-speed low-pressure ratio axial fan stage operating at stall conditions. Unsteady numerical simulations were conducted with the els A software, which...

...Jack Hutchings; Cesare A. Hall Previous research into axial compressor stall has mainly focused on stall inception and methods to extend the stable operating range. This paper considers the performance of an axial compressor beyond stall and investigates how the characteristics of stall cells...

... for publication in the J ournal of T urbomachinery . 12 07 2021 17 08 2021 18 08 2021 27 09 2021 aeromechanical instabilities compressor stall surge operability nonsynchronous vibration mistuning Cleansky 10.13039/501100000922 864719 Engineering and Physical...

... r S = ω v S Ω r S → 16 − 7.53 = 8.46 Table 2 Decompostion of spectral peaks, chart representing angular velocity of respective mode Fig. 8 Wall pressure spectrum of fan operating near stall, subtraction of ensemble average; swft window 25 REV...

... air in the reverse direction though the compressor while the impeller is spinning in the forward direction to obtain data in the negative mass flow region of the compressor map. This demonstrated experimentally that there is a stable operating region in the reverse flow regime. The recorded data...

... for publication in the J ournal of T urbomachinery . 07 10 2020 29 12 2020 29 12 2020 07 04 2021 compressor stall surge operability computational fluid dynamics (CFD) fan compressors Fourier methods Aircraft designs wherein the propulsive turbomachines are partially...

... for publication in the J ournal of T urbomachinery . 21 01 2020 24 07 2020 24 07 2020 28 12 2020 boundary layer development cavity and leaking flows compressor stall surge operability computational fluid dynamics (CFD) fan aerodynamics compressor aerodynamics turbine...

... instabilities Compressor stall Surge Operability The compressor is the first component to suffer from light or heavy rain in aero-engines. Extremely light rain is similar to the wet compression generated by water injection; it is sometimes used to increase the power output in military engines...

.... , Bouldin , B. , and Krishnan , P. M. , 2011 , “ Compressor Performance and Operability in Swirl Distortion ,” ASME J. Turbomach. , 134 ( 4 ), p. 041008 . 10.1115/1.4003657 [4] Pardo , A. C. , Mehdi , A. , Pachidis , V. , and MacManus , D. G. , 2014 , “ Numerical Study...

... by injecting 0.9% of annulus flow at the stall point under both operating speeds, using the redesigned compact injectors. Subsequently, Weichert et al. [ 16 ] proposed a self-regulating casing treatment that bleeds air over the rotor blade tip and injects air upstream of the same rotor. They reported parameter...

... for Fluid Dynamics (VKI). The test item has been tested in different operative conditions for two different speed lines (90% and 96% of the design speed) and for two different Reynolds numbers. Stable and unstable operative conditions have been investigated along with the stalling behavior, its inception...

... instabilities Fan Measurement techniques Compressor stall Surge Compressor Turbine aerodynamic design Operability Although the phenomena limiting the stability of transonic compressors have been the subject of intensive research for over 70 years, it remains difficult to accurately predict...

...; final manuscript received November 3, 2017; published online February 21, 2018. Editor: Kenneth Hall. 22 10 2017 03 11 2017 Compressor stall Design Surge Turbomachinery blading Operability Considering that the Reynolds number of flow in compressors is generally large...

... is the PR ratio, which is required to lie within a certain range for stable fan operation. In this study, there are three objectives that are of interest for which turbomachinery active performance maps will be generated: For brevity, only a single turbomachinery blade case is explored...