In the current project, the first author and the second author play a central role in conducting high-speed tuning and wind turbine wake analysis of the supercomputer version of RIAM-COMPACT. In this report, we applied the supercomputer version RIAM-COMPACT to the wind turbine wake simulation from the wind tunnel scale to the utility-scale wind turbine wakes. As a result, we clarified unsteady wake aerodynamics of wind turbines including multiple wake interactions with high precision and high reality.

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After the enforcement of the law on offshore renewable energy utilization, proposals of offshore wind power generation have become active in Hokkaido. It is necessary to obtain widespread support from the citizens toward to large amount of offshore wind power generation. This paper describes trends toward the development of offshore wind power generation in Hokkaido. In addition, the authors show the results of a questionnaire survey on the awareness of offshore wind power generation for students and citizens conducted from 2017 to 2019, and describe the factors that affect the awareness of offshore wind power generation. The major findings were as follows:(1) From the results of the questionnaire, it was found that the awareness of offshore wind power generation among the citizens is still lower than that of onshore wind power generation. In particular, the awareness of women was low; (2) As information sources for offshore wind power generation, many respondents answered on TV and the Internet. On the other hand, newspapers and books tended to have a large effect on the recognition of offshore wind power generation; (3) The higher the awareness of FIT, the higher the awareness of offshore wind power generation; (4) The future support for offshore wind power generation was currently lower than that of other renewable energies.

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