Experimental study of the mechanism of sound generation by a rotating stall in centrifugal turbomachines

1992 ◽  
Vol 91 (4) ◽  
pp. 2288-2289 ◽  
Author(s):  
Luc Mongeau
Keyword(s):  
Experimental Study ◽  
Rotating Stall ◽  
Sound Generation

An Experimental and Numerical Investigation Into the Mechanisms of Rotating Instability

2001 ◽  
Author(s):  
Joachim März ◽  
Chunill Hah ◽  
Wolfgang Neise
Keyword(s):  
Experimental Study ◽  
Numerical Investigation ◽  
Axial Flow ◽  
Rotating Stall ◽  
Tip Clearance ◽  
Stable Mode ◽  
Tip Clearance Flow ◽  
Double Phase ◽  
Clearance Flow ◽  
Rotating Instability

This paper reports on an experimental and numerical investigation aimed at understanding the mechanisms of rotating instabilities in a low speed axial flow compressor. The phenomena of rotating instabilities in the current compressor were first identified with an experimental study. Then, an unsteady numerical method was applied to confirm the phenomena and to interrogate the physical mechanisms behind them. The experimental study was conducted with high-resolution pressure measurements at different clearances, employing a double phase-averaging technique. The numerical investigation was performed with an unsteady 3-D Navier-Stokes method that solves for the entire blade row. The current study reveals that a vortex structure forms near the leading edge plane. This vortex is the result of interactions among the classical tip-clearance flow, axially reversed endwall flow, and the incoming flow. The vortex travels from the suction side to the pressure side of the passage at roughly half of the rotor speed. The formation and movement of this vortex seem to be the main causes of unsteadiness when rotating instability develops. Due to the nature of this vortex, the classical tip-clearance flow does not spill over into the following blade passage. This behavior of the tip-clearance flow is why the compressor operates in a stable mode even with the rotating instability, unlike traditional rotating stall phenomena.

scholarly journals Development of Small Rotating Stall in a Single Stage Axial Compressor

1985 ◽  
Author(s):  
K. Mathioudakis ◽  
F. A. E. Breugelmans
Keyword(s):  
Experimental Study ◽  
Rotor Blade ◽  
Axial Compressor ◽  
Propagation Speed ◽  
Rotating Stall ◽  
Operating Conditions ◽  
Blade Surface ◽  
Hot Wire ◽  
Additional Information ◽  
Cell Pattern

In this paper we present the results of a detailed experimental study of the development of small rotating stall, as it appears in a one stage axial compressor. Stationary hot-wire probes are used to measure the variation of amplitude and propagation speed of the disturbances caused by small stall. Measurements near the rotor blade surface with rotating probes provide additional information on the nature of the phenomenon. The development of the cell pattern for different operating conditions is studied. The different character from what is known as “big stall” is demonstrated.

Experimental Study of the Mechanisms of Sound Generation Due to an In-duct Orifice Plate

2015 ◽  
Author(s):  
Fuyang Tao ◽  
Xin Zhang ◽  
Phillip Joseph ◽  
Oksana Stalnov ◽  
Matthias Siercke ◽  
...  
Keyword(s):  
Experimental Study ◽  
Orifice Plate ◽  
Sound Generation

Numerical and experimental study of rotating stall in an axial compressor stage

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1132-1141 ◽  
Author(s):  
Helene M. Saxer-Felici ◽  
Andre P. Saxer ◽  
Andreas Inderbitzin ◽  
George Gyarmathy
Keyword(s):  
Experimental Study ◽  
Axial Compressor ◽  
Rotating Stall ◽  
Compressor Stage

C36 Experimental Study on Rotating Stall Suppression in Radial Vaneless Diffuser

2008 ◽  
Vol 2008.61 (0) ◽  
pp. 109-110
Author(s):  
Satoshi JOKO ◽  
Toshihiko KAKAZU ◽  
Satoshi WATANABE ◽  
Akinori FURUKAWA
Keyword(s):  
Experimental Study ◽  
Rotating Stall ◽  
Vaneless Diffuser

Numerical and Experimental Study of Rotating Stall in an Axial Compressor Stage

AIAA Journal ◽  
2000 ◽  
Vol 38 (7) ◽  
pp. 1132-1141 ◽  
Author(s):  
Helene M. Saxer-Felici ◽  
Andre P. Saxer ◽  
Andreas Inderbitzin ◽  
George Gyarmathy
Keyword(s):  
Experimental Study ◽  
Axial Compressor ◽  
Rotating Stall ◽  
Compressor Stage

Modified Surge in an Axial Flow Compressor

1992 ◽  
Author(s):  
Libor Půst
Keyword(s):  
Experimental Study ◽  
Unsteady Flow ◽  
Axial Flow ◽  
Rotating Stall ◽  
Design Flow ◽  
Flow Coefficient ◽  
Axial Flow Compressor ◽  
Flow Compressor

This paper deals with an experimental study of the unsteady flow in a multistage axial-flow compressor with a high design flow coefficient (p = 1.2) at rpm lower than the design ones. A detailed description of the rotating stall during the so-called “modified surge” is given. In this surge type the rotating stall exists during all the surge cycle, in contradistinction of classic surge, when the rotating stall exists only in a part of the surge cycle.

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