Professors
-
Visiting Professor
Susumu NAKANO -
Associate Professor
Yoichi TAKEDA -
Specially
Appointed Visiting
Associate Professor
Tamotsu NIHONYANAGI
The objectives of researches are to investigate the issues related to the improvement of efficiency and serviceability of fossil and nuclear power plants, and subjects on sophistication of maintenance. With aiming to establish sustainable operation of the electric power plants, investigations related to improvement of efficiency in the turbine system and degradation mechanisms of structural materials are carried out.
Performance Characteristic Analysis of Advanced Electric Power Generation System by Dynamic Simulator
Research purpose is to develop a dynamic simulator for a hybrid power generation system combining solid oxide fuel cells (SOFC) with microturbines which has been expected as an advanced electric power generation system with high efficiency. The realization of the advanced systems, optimization of the system, solutions for several problems which will be encountered in both scheduled and unscheduled operations of real machines, are studied by using the dynamic simulator.
Dependence of crack path on loading frequency.
Fig corresponds to the penetration ratio of intergranular crack.
Characterization of Heat Registrant Alloys for Advanced Ultra Super Critical (A-USC) Power Plant
With focusing on the change in material properties during long term operation, effects of steam oxidation and precipitations induced from the fabrication and/or welding process on cracking paths of candidate alloys for A-USC power plant are evaluated.
Investigation of Mechanism and Reducing Methodology of Material Damage in Wet Environments
Dependence of crack path on loading frequency.
Fig corresponds to the penetration ratio of intergranular crack.
In order to improve turbine efficiency in the low pressure steam turbine, investigations are carried out with focusing on the formation behavior of water film and droplet around blade trailing edge. Mechanistic study on water film separation behavior on the surface will promote to establish the novel techniques to decrease droplet impingement into the blades.
Research on Material Degradation Mechanism in High Temperature Water Environments
In order to improve prediction accuracy of material degradation in power plants, the final goal is set to develop evaluation method of the degradation on the basis of material surface condition. Oxidation behavior in co吋unction with crack embryo formation and reactions at alloy I oxide film interface are presumed. Process before small crack initiation is investigated with special emphasis on surface oxidation and its localization.
Research Topics
- Performance Characteristic Analysis of Advanced Electric Power Generation System by Dynamic Simulator
- Characterization of Heat Registrant Alloys for Advanced Ultra Super Critical (A-USC) Power Plant
- Investigation of Mechanism and Reducing Methodology of Material Damage in Wet Environments
- Research on Material Degradation Mechanism in High Temperature Water Environments