Improved Geometrical Scaling at the LHC

Michal Praszalowicz

doi:10.1103/physrevlett.106.142002

Improved Geometrical Scaling at the LHC

Physical Review Letters ◽

10.1103/physrevlett.106.142002 ◽

2011 ◽

Vol 106 (14) ◽

Cited By ~ 31

Author(s):

Michal Praszalowicz

Keyword(s):

Geometrical Scaling

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Geometrical scaling, furry branching and minijets

10.2172/6039439 ◽

1988 ◽

Author(s):

R. C. Hwa

Keyword(s):

Geometrical Scaling

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Effect of Scaling of Blade Row Sectors on the Prediction of Aerodynamic Forcing in a Highly-Loaded Transonic Compressor Stage

Volume 6: Structures and Dynamics, Parts A and B ◽

10.1115/gt2009-59601 ◽

2009 ◽

Cited By ~ 1

Author(s):

Mari´a A. Mayorca ◽

Jesu´s A. De Andrade ◽

Damian M. Vogt ◽

Hans Ma˚rtensson ◽

Torsten H. Fransson

Keyword(s):

Second Harmonic ◽

Harmonic Excitation ◽

Navier Stokes ◽

Test Case ◽

Moderate Amount ◽

Object A ◽

Transonic Compressor ◽

Geometrical Scaling ◽

Direct Indication ◽

Generalized Force

An investigation of the sensitivity of a geometrical scaling technique on the blade forcing prediction and mode excitability has been performed. A stage of a transonic compressor is employed as test object. A scaling ratio is defined which indicates the amount of scaling from the original geometry. Different scaling ratios are selected and 3D Navier Stokes unsteady calculations completed for each scaled configuration. A full annulus calculation (non-scaled) is performed serving as reference. The quantity of interest is the generalized force, which gives a direct indication of the mode excitability. In order to capture both up- and downstream excitation effects the mode excitability has been assessed on both rotor and stator blades. The results show that first harmonic excitation can be predicted well for both up- and downstream excitation using moderate amount of scaling. On the other hand, the predictions of second harmonic quantities do show a higher sensitivity to scaling for the investigated test case.

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