1. DIEF, Department of Industrial Engineering, University of Florence, via S.Marta 3, Firenze 50139, Italy e-mail:
2. DIEF, Department of Industrial Engineering, University of Florence, via Santa Marta 3, Firenze 50139, Italy e-mail:
3. GE Avio S.r.l., Combustion Systems Office, Rivalta di Torino (TO) 10040, Italy e-mail: