1. Turbomeca, Bordes 64510, France;
2. CFD Team CERFACS Toulouse 31057, France e-mail:
3. CFD Team CERFACS, Toulouse 31057, France
4. Dipartimento di Ingegneria industriale, University of Florence, Florence 50139, Italy
5. Dipartimento di Ingegneria industriale, University of Florence, Florence 50139, Italy e-mail:
6. Turbomeca, Bordes 64510, France