An application of the QFD method for the design of rocket turbopump turbines is presented. Generally, rocket turbopump turbines are designed as supersonic impulse turbines, and because of their special specifications, improvements in turbine efficiency and robustness are difficult. Further improvement in turbine design techniques is needed because turbine performance directly affects engine performance and reliability in a liquid rocket propulsion system. In this study, QFD is positioned as a means for selecting the design parameters in the parametric design process. Therefore, the purpose of QFD is to visualize the voice of the market(market needs)，which are essential for parametric design of supersonic turbines to identify important design parameters. In this paper, the QFD results for the identification of important design parameters and for the visualization of the market needs which was obtained from rocket engine stakeholders are discussed.
