전산유체역학 해석에 기반한 20kW급 도립형 횡류수차의 제작 및 성능 실증

초록

The cross-flow turbine is one of the most famous and widely used hydraulic power systems for a long time. The cross-flow turbine is especially popular in many countries and remote regions where off-grided because ofits many benefits such as low cost, high efficiency at low head, simple structure, and easy maintenance. However, most modern turbines, including the cross-flow turbine, are unsuitable for the ultra-low head situation,known as less than 3m water head or zero head with over 0.5m/s flow velocity. In this study, we demonstrateda 20kW class inverted-type cross-flow turbine’s performance. First, we reevaluated our previous studies andintroduced how to design the inverted-type cross-flow turbine. Secondly, we fabricated the 20kW classinverted-type cross-flow turbine for the performance test. And then, we designed a testbed and installed theturbine system in the demonstration facility. In the end, we compare the demonstration with its previous CFDresults. The comparing result shows that both CFD and real model fitted on guide vane angle at 10 degrees. Atthe demonstration, we achieved 42% turbine efficiency at runner speed 125 RPM.

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