Topological characterization of vortex structures on a transonic compressor stator during the stalling process

Numerical simulations, verified against experimental results, were used to study the stalling process of a transonic compressor. The method of topological analysis was used to study the distribution of the flow field on the blade surface in detail. In this manner, the steady three-dimensional vortex structure of the transonic compressor stator under transition conditions was established, and the mechanism of the stalling process was revealed from the perspective of the vortex structure evolution. The results show that in the process of stalling, as the back pressure increases, the separation areas on the suction side of the stator and the scale and strength of the separation vortex also increase, thereby weakening other vortices and causing a large amount of low-energy fluid to accumulate in the passage. Thus, the passage is blocked, and the through-flow capability of the compressor is reduced. In addition, because of the complex movement of the vortices and the transport of low-energy fluid clusters, the boosting capacity of the compressor is reduced, thus causing the compressor to stall.

[1]  Chunill Hah,et al.  An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability , 2001 .

[2]  Tom Hynes,et al.  Stall Inception in Axial Compressors , 1990 .

[3]  Mark Jermy,et al.  Location of the vortex formation threshold at suction inlets near ground planes by computational fluid dynamics simulation , 2008 .

[4]  Masahiro Inoue,et al.  The role of tip leakage vortex breakdown in compressor rotor aerodynamics , 1998 .

[5]  Xingen Lu,et al.  Effects of low Reynolds number on flow stability of a transonic compressor , 2015 .

[6]  L Zhao,et al.  Passive control of hub-corner separation/stall using axisymmetric-hub contouring , 2012 .

[7]  J. H. Horlock.  Axial Flow Turbines , 1966 .

[8]  Ivor Day,et al.  1997 Best Paper Award—Turbomachinery Committee: A Study of Spike and Modal Stall Phenomena in a Low-Speed Axial Compressor , 1998 .

[9]  Ivor Day,et al.  Detailed Measurements of Spike Formation in an Axial Compressor , 2012 .

[10]  Stefan Wagner,et al.  Numerical ; Experimental Study for Short Wavelength Stall Inception in a Low-speed Axial Compressor , 1999 .

[11]  J-L Lu,et al.  Numerical and experimental research of stall inception on subsonic axial-flow compressor rotor , 2010 .

[12]  Yu Xian.  THREE-DIMENSIONAL FLOW STRUCTURES IN STATOR PASSAGE OF AN AXIAL COMPRESSOR AT THE NEAR-STALL CONDITION , 2009 .

[13]  J. L. Livesey.  Axial flow turbines: J. H. Horlock: Butterworths (1966). pp. 275, 97s. 6d , 1966 .

[14]  Y-Y Chen,et al.  A study of speed ratio affecting the performance of a contra-rotating axial compressor , 2008 .

[15]  Ivor Day,et al.  A study of spike and modal stall phenomena in a low-speed axial compressor , 1997 .

[16]  D. G. Ainley.  Performance of Axial-Flow Turbines , 1948 .

[17]  Wang Zhong-qi,et al.  An application of topological method to analysing the three-dimensional flow in cascades (II)—Topological analysis on the vector field patterns of skin-frictions and section streamlines , 1990 .

[18]  Masahiro Inoue,et al.  Unsteady Flow Behavior due to Breakdown of Tip Leakage Vortex in an Axial Compressor Rotor at Near-Stall Condition , 2000 .

[19]  Huu Duc Vo.  Role of tip clearance flow on axial compressor stability , 2001 .

[20]  Lu Hua.  Investigation of Flow Structure in Compressor Stator Passage With Hub Tip , 2012 .

[21]  Konrad Vogeler,et al.  Rotating Instabilities in an Axial Compressor Originating From the Fluctuating Blade Tip Vortex , 2000 .

[22]  F. Moore,et al.  A Theory of Post-Stall Transients in Axial Compression Systems: Part I—Development of Equations , 1986 .

[23]  Alan H. Epstein,et al.  Rotating Waves as a Stall inception Indication in Axial Compressors , 1991 .

[24]  Reinhard Niehuis,et al.  Rotating Stall Inception Inside the Low Pressure Compressor of a Twin-Spool Turbofan Engine , 2013 .

[25]  F. Moore,et al.  A Theory of Post-Stall Transients in Axial Compression Systems: Part II—Application , 1986 .

[26]  Kang Shun.  An application of topological analysis to studying the three-dimensional flow in cascades; part I—Topological rules for skin-friction lines and section streamlines , 1990 .