Rotating Stall in an Axial Flow Single Stage Compressor. On-Blade Velocity Measurements PDF Download
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Author: B. Gyles Publisher: ISBN: Category : Languages : en Pages : 112
Book Description
Three multiple hot wire sensors are developed and applied to a low speed axial compressor rotor blade. The multiple wire sensor design is based on the technique of the combined hot and cold wire in a parallel arrangement for the detection of flow separation and reversal. The sensors are used in the unstalled and stalled part of the compressor characteristics with one and two stall cells present. The signals are analyzed using the fast Fourier transform, power spectra and correlation techniques. (Author).
Author: B. Gyles Publisher: ISBN: Category : Languages : en Pages : 112
Book Description
Three multiple hot wire sensors are developed and applied to a low speed axial compressor rotor blade. The multiple wire sensor design is based on the technique of the combined hot and cold wire in a parallel arrangement for the detection of flow separation and reversal. The sensors are used in the unstalled and stalled part of the compressor characteristics with one and two stall cells present. The signals are analyzed using the fast Fourier transform, power spectra and correlation techniques. (Author).
Author: S. R. Montgomery Publisher: ISBN: Category : Axial flow compressors Languages : en Pages : 28
Book Description
The rotating-stall characteristics of a single-stage axial-flow compressor were investigated. The number of stall cells and their propagation velocities were found with and without stator blades. The measured velocities were compared with those predicted by Stenning's theory (see NACA TN 3580), assuming the dounstream pressure fluctuations to be negligible, and correlation within 10 percent was obtained at the onset of stall. It was found that the pressure fluctuations cauased by rotating stall were less downstream of the rotor than upstream; the minimum reduction across the rotor was 40 percent with stator blades and 75 percent without stator blades. It was also that, for the compressor tested, the stator blades decreased the number of stall cells and tended to induce rotating stall at larger mass flow rates.
Author: Jack F. Runckel Publisher: ISBN: Category : Aerodynamic load Languages : en Pages : 550
Book Description
A preliminary investigation has been made of the pressure distribution about the mean-radius section of the rotating blades of a single-stage axial-flow compressor at a blade Mach number of 0.35. A 24-cell pressure-transfer device used in obtaining the pressure data is described and the accuracy of these data is established by several independent methods.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725675087 Category : Languages : en Pages : 30
Book Description
This paper presents a study of the dynamics for a single-stage, axial-flow, high speed compressor core, specifically, the NASA Lewis rotor stage 37. Due to the overall blading design for this advanced core compressor, each stage has considerable tip loading and higher speed than most compressor designs, thus, the compressor operates closer to the stall margin. The onset of rotating stall is explained as bifurcations in the dynamics of axial compressors. Data taken from the compressor during a rotating stall event is analyzed. Through the use of a box-assisted correlation dimension methodology, the attractor dimension is determined during the bifurcations leading to rotating stall. The intent of this study is to examine the behavior of precursive stall events so as to predict the entrance into rotating stall. This information may provide a better means to identify, avoid or control the undesirable event of rotating stall formation in high speed compressor cores. Bright, Michelle M. and Qammar, Helen K. and Hartley, Tom T. Unspecified Center NASA-TM-107268, E-10335, NAS 1.15:107268 RTOP 505-62-50...
Author: B. Gyles
Author: B. Gyles
Author: Robert W. Graham
Author: S. R. Montgomery
Author: Massachusetts Institute of Technology. Gas Turbine Laboratory
Author: Jack F. Runckel
Author: Lewis Research Center
Author: Robert O. Bullock
Author: F. K. Moore
Author: National Aeronautics and Space Administration (NASA)
Author: J. J. Moses