Laser measurements in high speed compressors for rotor-stator interaction analysis

Ottavy, Xavier; Trébinjac, Isabelle; Vouillarmet, André; Arnaud, David

doi:10.1007/s11630-003-0036-6

Cited by 8 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It means that the energetic contribution of the rotor-stator unsteady interaction is strong enough so that some of its structures are gathered together the fluctuations induced by the rotor wakes, in POD modes of low order. It also confirms the fact that the energy of the unsteady interaction is of the same order of magnitude as the energy of the fluctuations induced by the upstream blade row, as shown in [5] from studies performed in both axial and centrifugal compressors.…”

Section: Pod Modessupporting

confidence: 80%

An extraction of the dominant rotor-stator interaction modes by the use of Proper Orthogonal Decomposition (POD)

2006

View full text Add to dashboard Cite

The Proper Orthogonal Decomposition method is applied to the instantaneous velocity field within the rotor-stator inter-row region of a high-speed high-pressure centrifugal compressor. The processed data come from experiments and numerical simulations. In comparison with a Fourier transform, the POD gives the best modal approximation for both initial fields, in terms of the energy expressed on any given number of modes to be taken into account: to reach 98% of the total energy of the velocity field, the required number of POD modes is up to nine times lower than the number of Fourier harmonics. The individual POD modes are given and show that the unsteady rotor-stator interaction is already present in the very first modes.

show abstract

Section: Pod Modessupporting

confidence: 80%

An extraction of the dominant rotor-stator interaction modes by the use of Proper Orthogonal Decomposition (POD)

2006

View full text Add to dashboard Cite

show abstract

“…S3 surface is the plane of the blade row which is perpendicular to the axis of rotation. The dynamic flow field data and velocity fluctuation from the same surface between the gaps had also been captured by PIV measurement (Ottavy et al, 2003) and hot wire anemometer (Oro et al, 2011). The spectra of pressure fluctuation on the blade surface had been measured by pressure sensors, which were buried beneath the surface of the rotor and stator (Wang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Unsteady Flows and Noise in Rotor-Stator Interaction with Adjustable Lean Vane

Liu¹,

Ouyang²,

Wu³

et al. 2014

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

ABSTRACT:The paper is a study of the noise reduction effects of the stator lean angle. Firstly, a numerical study has been carried out to investigate the unsteady characteristics of the flow induced by the rotor-stator interaction. To obtain the rotor"s wake, the distribution of the RMS pressure and the pressure disturbance coefficient, the compressor with an adjustable stator lean angle has been numerically studied. Then the compressor was experimentally tested at 11 different lean angles to obtain the free field noise spectra. Both the unsteady flow property and noise characteristics are discussed on the basis of the Computational Fluid Dynamics (CFD) results. The results indicate that (1) the pressure fluctuation of stator is the main source of the interaction noise; (2) the phase of rotor"s wake can be tuned by the lean angle of the stator; (3) the distribution of the first harmonic of tone noise decides the distribution of total Sound Pressure level (SPL); and (4) stator with positive lean angle has better noise reduction than negative one and the lean angle should exceed 10° for better noise reduction.

show abstract

“…For examples, with a counting system detecting the rotor blade position, Ottavy et al reconstructed the velocity fields underthe various rotor-stator relative locationsfor high speed compressors [12]. Estevadeordal et al reproduced the flow fields at the certain rotor locations in a low speed axial fanwith a measurement system synchronized to the blade position [13].…”

Section: 1measurement Systemmentioning

confidence: 99%

“…Fixing the measurement systems in the stationary frame, numerous researchers established the ensemble averaged distribution of specific flow characteristics inside the rotating machinery by measuring synchronized to the rotation of rotor blades [12,13]. Compared with thetraditional rotor-stator combinationsin their studies where only two frames (one stationary and single rotating frame) exist, the contra-rotating rotors (requiredone stationary and two rotating framesto be considered) appear rather complicated to be tracked during experiment.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Blade-To-Blade Pressure Distribution in Contra-Rotating Axial Flow Pump

Cao

Watanabe

Honda

et al. 2014

International Journal of Fluid Machinery and Systems

View full text Add to dashboard Cite

As a high specific speed pump, the contra-rotating axial flow pump with two rotors rotating reversely has been proved with higher hydraulic and cavitation performance, while in our previous researches, the potential interaction between two blade rows was distinctly observed for our prototype rotors designed with equal rotational speed for both front and rear rotors. Based on the theoretical and experimental evidences, a rotational speed optimization methodology was proposed and applied in the design of a new combination of contra-rotating rotors, primarily in expectation of the optimized blade pressure distributions as well as pertinently improved hydraulic performances including cavitation performance. In the present study, given one stationary and two rotating frames in the contra-rotating rotors case, a pressure measurement concept taking account of the revolutions of both front and rear rotors simultaneously was adopted. The casing wall pressure data sampled in time domain was successfully transferred into space domain, by which the ensemble averaged blade-to-blade pressure distributions at the blade tip of two contra-rotating rotors under different operation conditions were studied. It could be seen that the rotor pair with the optimized rotational speed combination as well as work division, shows more reasonable blade-to-blade pressure distribution and well weakened potential interaction. Moreover, combining the loading curves estimated by the measured casing wall pressure, the cavitation performance of the rotor pairs with new rotational speed combination were proved to be superior to those of the prototype pairs.

show abstract

Laser measurements in high speed compressors for rotor-stator interaction analysis

Cited by 8 publications

References 6 publications

An extraction of the dominant rotor-stator interaction modes by the use of Proper Orthogonal Decomposition (POD)

An extraction of the dominant rotor-stator interaction modes by the use of Proper Orthogonal Decomposition (POD)

Investigation of Unsteady Flows and Noise in Rotor-Stator Interaction with Adjustable Lean Vane

Experimental Investigation of Blade-To-Blade Pressure Distribution in Contra-Rotating Axial Flow Pump

Contact Info

Product

Resources

About