Objectives

The first key technical objective of the project is to obtain a detailed understanding of the mutual interactions between components found in ECS systems. The second objective is to provide modelling guidelines for the simulation – and eventually optimization – of these systems. The third objective is directly aimed at the reduction of cockpit/cabin and ramp noise, through the elaboration of system assembly guidelines and the investigation of passive flow and acoustic strategies.

On the basis of the above considerations and under the guidance of the final users EMB and LTS, the consortium as agreed to retain the following essential elements that compose an ECS system:

  • the blowing unit,
  • a duct system including bends, vanes and contractions.

The IDEALVENT project tackles the noise problem at the source, and adopts the viewpoint of the ECS manufacturer and of the integrator (his customer). The blowing unit will consist in an industrial fan model that will be provided to the consortium by LTS. The three-dimensional CAD will be made available to the partners in charge of the modelling and simulation Tasks. With regard to this blowing unit, two important installation effects will be studied in detail:

  1. Extraneous noise is produced by the fan (tonal and broadband) when an inflow distortion is caused by a non-circular or split (T-joint) ducting is present upstream of it. Those configurations are frequently encountered in industrial systems, due to space constraints.
  2. The fan is itself inducing flow disturbances, which cause additional noise when interacting with geometrical singularities located downstream of it. In this study, a representative diaphragm will be placed downstream of the fan, at varying distances for the assessment of the installation effects.