Unsteady Flow Field Measurements In An Industrial Centrifugal Compressor

@inproceedings{Toni2010UnsteadyFF,
  title={Unsteady Flow Field Measurements In An Industrial Centrifugal Compressor},
  author={Lorenzo Toni and Valeria Ballarini and Stefano Cioncolini and Paolo Gaetani and Giacomo Persico},
  year={2010}
}
Unsteady flow field measurements of both static and total pressure, and discharge angle have been carried out downstream of an industrial centrifugal impeller. Phase-resolved measurements were performed using a cylindrical single sensor fast response aerodynamic pressure probe (FRAPP) traversing and rotating from the impeller hub up to the shroud. Since FRAPP operates as a virtual three-hole probe, it was possible to obtain a detailed bidimensional reconstruction of the flow field. An… 

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  • F. MerliG. Paolo
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    13th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics
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References

SHOWING 1-10 OF 17 REFERENCES

Three Dimensional Clocking Effects in a One and a Half Stage Transonic Turbine

This paper presents an experimental investigation of the flow field in a high-pressure transonic turbine with a downstream vane row (1.5 stage machine) concerning the airfoil indexing. The objective

A Parametric Study of the Blade Row Interaction in a High Pressure Turbine Stage

An extensive experimental analysis on the subject of the unsteady periodic flow in a high subsonic high pressure (HP) turbine stage has been carried out at the Laboratorio di Fluidodinamica delle

Time-resolved flow measurements with fast-response aerodynamic probes in turbomachines

A better understanding of unsteady flow phenomena encountered in rotor-stator interactions is a key to further improvements in turbomachinery. Besides CFD methods yielding 3D flow field predictions,

Investigation of the Flow Field in a High-Pressure Turbine Stage for Two Stator-Rotor Axial Gaps—Part II: Unsteady Flow Field

An extensive experimental analysis was carried out at Politecnico di Milano on the subject of unsteady flow in high pressure (HP) turbine stages. In this paper, the unsteady flow measured downstream

A New Slip Factor Correlation for Centrifugal Impellers in a Wide Range of Flow Coefficients and Peripheral Mach Numbers

The preliminary design of new centrifugal stages often relies on one-dimensional codes implementing the concept of slip factor. This parameter plays a primary role in the stage design process since

Shock tube flows past partially opened diaphragms

Unsteady compressible flows resulting from the incomplete burst of the shock tube diaphragm are investigated both experimentally and numerically for different initial pressure ratios and opening

Experimental Characterization of Vaneless Diffuser Rotating Stall: Part V — Influence of Diffuser Geometry on Stall Inception and Performance (3rd Impeller Tested)

Vaneless diffuser rotating stall is a serious problem for centrifugal compressors, since it limits their working range. In the literature some good correlations can be found for predicting stall

Improving the Accuracy of Tests for Centrifugal Compressor Stage Performance Prediction

A design of experiment approach was used to solve problems on the new centrifugal compressor stage development test beds at the Nuovo Pignone – GE Oil&Gas premises in Florence, Italy. The company is

Influence of temperature transients and centrifugal force on fast-response pressure transducers

Abstract. This contribution focuses on the use of fast-response semi-conductor pressure transducers to measure accurately the mean and fluctuating total pressure or static pressure in a wind tunnel

Design and analysis of new concept fast-response pressure probes

Two cylindrical fast-response pressure probes for unsteady flow measurements in turbomachinery have been designed and tested. Commercially available miniaturized pressure sensors have been used to