Sentence examples for flow liner from inspiring English sources
The optimized design of bias flow liner is a key element for the development of low emission combustion systems in modern gas turbines and aero-engines.
In a next step the fundamental acoustic property of bias flow liner in terms of the wall impedance is introduced and the different derivations and formulations of this impedance yielding the different published model descriptions are explained and compared.
The research of bias flow liners has a fairly long history concerning both the parameter dependencies as well as the methods to model the acoustic behaviour of bias flow liners under the variety of different bias and grazing flow conditions.
Finally, a parametric study reveals the most relevant parameters for the acoustic damping behaviour of bias flow liners and how this is reflected by the various model representations.
In order to establish an overview over the state of the art, this paper provides a comprehensive review about the published research on bias flow liners and modelling approaches with an extensive study of the most relevant parameters determining the acoustic behaviour of these liners.
In the absence of flow, the liner has a classical behavior: the acoustic transmission coefficient has a minimum at the resonance frequency of the resonators.
In the absence of flow the liner reacts classically: there is a significant decrease in the transmission coefficient around the frequency of minimal impedance.
The parameters are representative of the flow conditions, liners and sound fields found in current turbofan engines.
The plastic flow of the liner was modelled using the method of successive elastic solutions.
For typical values in aeronautics the flow above the liner is unstable.
