About ARIAS/ Project Structure

Project Structure

Project is organized in four technical work packages (WP1-WP4), a work package dedicated to exploitation and communication (WP5), and finally a project management WP6.

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WP1
Understanding and quantification of compressor forced response and flutter

WP1 aims to generate rig data that can be used to validate analysis methods for forced response in axial compressors. To achieve this the following complementary key activities will be performed within the WP: 

  1. A series of transonic compressor rig tests with extensive aerodynamic and aeromechanical measurements ( at TU Darmstad). 

  2. A series of vacuum rotating rig tests of split ring dampers (at ECL); 

  3. A series of an oscillating transonic compressor cascade rig tests with detailed unsteady pressure measurements (at KTH);  

  4. A series of tests of a rotating compressor rotor subject to controlled excitation amplitude with measurements of aerodynamic damping (at Univ. of Stuttgart) 

  5. Extensive analytical studies on unsteady aerodynamics, aeromechanics and friction damping, including quantifications of uncertainties and variability effects. 

WP2
Understanding non-linear aeroelastic interactions in turbine blade rows

WP2 aims at improving the understanding of the non-linear aero-elastic interactions between flutter and forced response in a single family of blade dominated modes  or interaction between the unstable modes of different families. It also aims at understanding the impact of intentional mistuning on unstable modes. Following key activities will be performed: 

  1. Design of experiment for flutter and forced response interaction and rig adaptation

  2. Dynamic and damping characterization of bladed-discs

  3. A series of cold flow aeroelastic testing in rotating turbine rig at CTA

  4. Testing of superimposition of flutter and forced response in spin rig at GE Avio

  5. Validation and development of simulation technologies 

WP3
Understanding, predicting and controlling flutter in labyrinth seals

Research activity in WP3 aims to address shortcomings in the current understanding of the physics of seal flutter and inability to predict behaviour both accurately and in a timely manner.The work consists of four main elements:

  1. Design and construction of a dedicated and unique static seal rig facility (at Imperial College)

  2. A series of static rig tests  to quantify and rank the effects of all design parameters on flutter stability and understand their interdependencies

  3. Development of methods to predict seal flutter occurrence (focus on more accurately and completely modelling the appropriate multi-physical effects that play a part in seal flutter)

  4. Validation in a full rotating rig (at CTA)

WP4
Future enabling technologies

WP4 is focusing on developing following technology areas:

  • Innovative methods to assess flutter and forced response

    • Multimodal simulation for forced response 

    • Method development for superimposition of flutter and
      forced response assessment

    • Novel seal flutter methods development

  • New methods to measure aeromechanic vibrations

    • Advanced blade monitoring through innovative tip-timing 
      algorithm techniques and unsteady pressure measurements

  • New technologies to mitigate aeromechanic vibrations

    • Vibration control with piezoelectric dampers

WP5
Dissemination, exploitation,communication and e-learning

The work within WP5 includes preparation of website, data knowledge management and various communication materials, as well as the communication of the activities performed in the project.

A somewhat unique communication will take place with preparation of the e-learning material in form of Learning Modules that will be included in the ARIAS e-learning repository and made available for public.