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논문 기본 정보

자료유형
학술저널
저자정보
Qingsheng Wei (Mokpo National University) Zhenmu Chen (Mokpo National University) Patrick Mark Singh (Mokpo National University) Young-Do Choi (Mokpo National University)
저널정보
한국유체기계학회 한국유체기계학회 논문집 한국유체기계학회 논문집 제18권 제1호
발행연도
2015.2
수록면
11 - 19 (9page)

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Recently, the cross flow turbines attract more attention for their good performance over a large operating regime at off design point. This study employs a very low head cross flow turbine, which has open inlet duct and has barely been studied before, to investigate the performance of the cross flow turbine with air suction from the rear part of the runner. Unlike conventional cross flow turbines, a draft tube is attached to the outlet of runner to improve the turbine performance. Water level and pressure in the draft tube are monitored to investigate the influence of air suction. Torque at local blade passage of three parts of runner is examined in detail under the conditions of different air suction. Consequently, it is found that with proper air suction in the runner chamber, the water level in the draft tube gradually drops to Stage 2 of the runner and the efficiency of the turbine can be raised by 10%. Overall, the effect of air-layer on the performance of the turbine is considerable.

목차

ABSTRACT
1. Introduction
2. Cross Flow Hydro Turbine Model with Open Inlet Duct
3. Numerical Methods and Boundary Condition
4. Results and Discussion
5. Conclusions
Reference

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