2012年 沐若台阶式溢洪道掺气减蚀设施研究.pdf

Available online at Procedia Engineering Procedia Engineering 00 (20 11) 000–000 Procedia Engineering 28 (2012) 803 – 807 /locate/procedia 2012 International Conference on Modern Hydraulic Engineering Aerator of stepped chute in Murum Hydropower Station a WANG Si-ying , HOU Dong-mei, WANG Cai-huan, a* Changjiang River Scientific Research Institute, Wuhan, Hubei, 430015, China Abstract This paper considers the effect of an aerator type to counter cavitation damage on the stepped chute in Murum Hydraulic Power Station. The shape of the aerator was optimized and the aeration effect was observed by hydraulic modeling. The experimental results revealed that, compared to standard stepped spillway flow, considerable differences were detected in the closely downstream of the aerator. Steady cavities were formed and flow before the point of incipient self-aeration was pre-aerated, and the air concentration of bottom flow on the stepped chute was obviously increased, which means the cavitation damage was successfully avoided. © 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Society for Resources, © 201 1 Published by Elsevier Ltd. Environment and Engineering Keywords: aerator; stepped chute; Murum Hydropower Station; air concentration; cavitation damage 1. Introduction