| 英文摘要 |
Most popular aerator of aquaculture in Taiwan is paddlewheel (1 to 2 Horse power), and the advance benefits are (1) Enhance upper and middle water layer dissolved oxygen in fishpond ,(2) Change flow field to collect sediment and make organic solid settle down. Two targets above mention can achieve explicitly depends on paddlewheel disposition design.
This research use computational fluid dynamics analysis software (C.F.Design) which simulates how much power usage to increase bottom dissolved oxygen and water flow distribution. Change factors include area of fishpond, numbers of paddlewheels, different dispose locations and arrangement. Duplicate simulate process to find the suitable flow field distribution and paddlewheel arrangement.
Then investigates the fishpond, choice 4 simulate model and multi- position to experiment with distributions of velocity, turbidity and dissolved oxygen. Compared difference with simulation and the actual result to provide follow basis of engineering design. And choose 1 fishpond to finish water flow management experiment to carry on disposal particle, including: Determine suitable paddlewheel disposition to centralize particle, improve the collection technology and design simple type purify facilities effectively. |