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Internal degrees of freedom of an actuator disk model

Internal degrees of freedom of an actuator disk model
Internal degrees of freedom of an actuator disk model
Actuator disk models can have internal degrees of freedom as, for example, in the case for models with lagged losses, governed by additional differential equations. Generally, being a system with distributed parameters, flow in the interblade passage has an infinite number of internal degrees of freedom. An attempt is made to estimate how many of them can be distinguished as the most important.
The response of a blade row to time-periodic excitations is modeled by an actuator disk with internal degrees of freedom and by linearized Navier Stokes equations, and the results are compared. It is found that in the case of subsonic flow one internal degree of freedom can be considered as the most important, both for design and off-design regimes. In the case of transonic flow in off-design regime, two internal degrees of freedom are more important than the rest.
However, for the transonic design regime, no internal degrees of freedom could be distinguished as especially significant. The physical mechanisms associated with distinguished internal degrees of freedom are investigated.
0748-4658
155-163
Chernyshenko, Sergei I.
a49ccead-e110-4ad7-aaa4-44052571d027
Privalov, Aleksei V.
5f842efb-7ac1-4f57-bc1c-236f976ad179
Chernyshenko, Sergei I.
a49ccead-e110-4ad7-aaa4-44052571d027
Privalov, Aleksei V.
5f842efb-7ac1-4f57-bc1c-236f976ad179

Chernyshenko, Sergei I. and Privalov, Aleksei V. (2004) Internal degrees of freedom of an actuator disk model. Journal of Propulsion and Power, 20 (1), 155-163.

Record type: Article

Abstract

Actuator disk models can have internal degrees of freedom as, for example, in the case for models with lagged losses, governed by additional differential equations. Generally, being a system with distributed parameters, flow in the interblade passage has an infinite number of internal degrees of freedom. An attempt is made to estimate how many of them can be distinguished as the most important.
The response of a blade row to time-periodic excitations is modeled by an actuator disk with internal degrees of freedom and by linearized Navier Stokes equations, and the results are compared. It is found that in the case of subsonic flow one internal degree of freedom can be considered as the most important, both for design and off-design regimes. In the case of transonic flow in off-design regime, two internal degrees of freedom are more important than the rest.
However, for the transonic design regime, no internal degrees of freedom could be distinguished as especially significant. The physical mechanisms associated with distinguished internal degrees of freedom are investigated.

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Published date: 2004

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Local EPrints ID: 22680
URI: https://eprints.soton.ac.uk/id/eprint/22680
ISSN: 0748-4658
PURE UUID: 188c603b-278f-40c1-939f-f68f3f07ee66

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Date deposited: 22 Mar 2006
Last modified: 17 Jul 2017 16:21

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Contributors

Author: Sergei I. Chernyshenko
Author: Aleksei V. Privalov

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