| Multidisciplinary Design Optimization (MDO) refers to an area of research concerned with developing systematic approaches to the design of complex engineering artifacts and systems governed by interacting physical phenomena. In this thesis, the MDO theory is applied on turbine blade design, and a new multidisciplinary design optimization procedure, integrating aerodynamic, heat transfer, fatigue life, modal and structural design criteria along with various mechanical and geometric constraints, has been developed for the design of turbine blades.The purpose of the research here is to establish a procedure for turbine blade design. The following works is performed:1. The present research status and engineering application of the MDO are summarized, the definition and the components of MDO technology is discussed in the thesis.2. The relative knowledge of each discipline involved in the turbine blade design, such as aerodynamic, heat transfer, fatigue life, modal, structure and so on, is described minutely.3. A new parametric model design procedure for simple cooling turbine blade is developed;five-order polynomial expression is used for defining the blade profile, the medial camber line of blade is also calculated to locate the cooling passages.4. The aerodynamic profiles optimal design of turbine blade is implemented with the objective of efficiency in this thesis. The result shows that the efficiency is enhanced comparing with initial profiles of the blade.5. Based on the former researches, a new multidisciplinary design optimization procedure for cooling turbine blade is developed. With the parametric model design program and the data transfer programs, the all analysis software isintegrated with the ISIGHT software, and the SA and SQP algorithm are used for searching the optimal values. With the objective of average temperature of the blade, the result of calculation shows that the procedure for turbine blade design is powerful. |
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