Numerical Simulation of Flow Around Current Water Wheel by MPS Method

Abstract

Atsushi NAMIHIRA, Masahiro GOTO and Kyoji TAKAKI 1 正会員 博士(農) 農研機構農村工学研究所資源循環工学研究領域(〒305-8609 つくば市観音台2-1-6)The applicability of MPS method as an assessment tool for flow regimes in installing a current water wheel in an open channel as one of the development of micro-scale hydropower generation in irrigation systems, was examined. As a result, the simulated flow regimes agreed qualitatively with the experimental results at given rotational speeds of the water wheel. However, the simulated energy difference between upstream and downstream of the water wheel was about 20% larger than the experimental results at given rotational speeds in the case the length of water turbine runner was 0.1m. The main reasons were considered to be numerical pressure fluctuation known as a problem of original MPS method, and lack of phenomenal representation based on employing the 2D single-phase model.