Rotorcraft input for the Technology Evaluator (GRC7)


The "Technology Evaluator for Rotorcraft", GRC7, provides the interface between the Green RotorCraft and the Technology Evaluator. Its main goal is to deliver to the TE all information, advice and data needed to calculate the rotorcraft environmental impact and to assess the benefits obtained through the technologies developed. In this supporting role, GRC7 endeavours to ensure that the uniqueness of rotorcraft operations is duly taken into account in the comprehensive TE picture. 

Modelling activities

GRC7 activities are focused on the preparation of the rotorcraft simulation framework integrating several mathematical models. The following areas have been considered (with the selected software codes in brackets): flight mechanics (EUROPA), noise (HELENA), engine fuel consumption and gas emissions (GSP). In a second step, it is planned to integrate turboshaft engine benefits as resulting from the SAGE5 project. All software components have been federated by using the OPTIMUS toolkit (provided by LMS), in a global simulation platform dubbed PHOENIX (see diagram) that is coupled to the TE ones. Mathematical models representing generic rotorcraft for the following weight classes are prepared: Single Engine Light ( SEL ≤ 4 tons), Twin Engine Light (TEL ≤ 4 tons), Twin Engine Medium (4 to 8 tons), Twin Engine Heavy (TEH > 8 tons), Tiltrotor A/C, Diesel-powered Light Helicopter. Typical helicopter missions are modelling the full range of actual operations. Two worldwide rotorcraft fleets are specified, one for the year 2000 and the other for 2020 and beyond (based on commercial forecast). Environmental benefits for the future fleet will be assessed using such conceptual rotorcraft models that integrate the new systems and technologies developed in Clean Sky. 


A first example of the PHOENIX application, coupled with the IESTA simulation platform (ONERA) has been performed for typical police missions on Amsterdam, based on preliminany models. Figure 16 shows simulated noise footprints comparing a baseline TEL (year 2000) and the conceptual 2020+ one.