1. Research & Innovation Center, Mitsubishi Heavy Industries, Ltd., 2-1-1 Shinhama, Arai-cho, Takasago 676-8686, Hyogo, Japan e-mail:
2. Turbomachinery Headquarters, Mitsubishi Hitachi Power Systems, Ltd., 2-1-1 Shinhama, Arai-cho, Takasago 676-8686, Hyogo, Japan e-mail:
3. Turbomachinery Headquarters, Mitsubishi Hitachi Power Systems, Ltd., 3-1-1 Saiwai-cho, Hitachi, Ibaraki 317-8585, Japan e-mail: