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ACCENTO (Active Clearence Contol dEsigN and characTerizatiOn). Advanced investigations on different Low Pressure Turbine Active Clearance Control (LPTACC) system by means of CFD and experiments.

Project description

A novel test rig will help engineers characterise jet spray cooling of jet engines

All engines have cooling systems in place to keep components within their operating temperatures. Impingement cooling relies on an array of jets of high-velocity gas or fluid that impinges on a surface and achieves locally high heat transfer. Its use is widespread in industry and even in the freezing of tissues in cryosurgery. The EU-funded ACCENTO project will support its successful application to aerospace engines with a test rig to help engineers reliably predict the aero-thermal behaviour of impingement cooling system concepts.


This proposal refers to the Clean Sky 2 topic JTI-CS2-2018-CfP08-ENG-01-36 “Optimizing impingement cooling”. The objective of ACCENTO (Active Clearence Contol dEsigN and characTerizatiOn) project is to carry out a series of advanced investigations on different Low Pressure Turbine Active Clearance Control (LPTACC) system pipes and target plates. The aim is to develop design/verification procedures and models to confidently predict the impinging system aero-thermal behaviour. This goal will be pursued by means of dedicated experimental tests and numerical simulations. The great ambition of the ACCENTO program is to design a modular test rig able to accommodate long ACC pipes (0.8 m to 1.5 m) which will be operated in engine representative conditions. The rig will be able to provide reliable data for impingement cooling heat transfer characterization in a wide range of operating points. The radiative heat transfer impact on the system performance will be also accounted for. The rig will provide high quality data in conjunction with controlled operating conditions to validate CFD tools for the heat transfer and, more in general, for the ACC system characterization. The expected outcomes of the project are the design, the commissioning and the testing of a modular rig for ACC heat transfer process characterization, the validation of CFD methodologies for such systems analysis and the development of design correlations for both the impingement holes discharge coefficient and for the jets Nusselt number. Moreover, thanks to the modularity of the developed rig, future and successive tests and analyses will be possible.


Net EU contribution
€ 440 000,00
50127 Firenze

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The organization defined itself as SME (small and medium-sized enterprise) at the time the Grant Agreement was signed.

Centro (IT) Toscana Firenze
Activity type
Private for-profit entities (excluding Higher or Secondary Education Establishments)
Total cost
€ 440 000,00

Participants (1)