Research on Cavitation Characteristics and Control Measures of Horizontal Swirl Spillway Tunnel. Issue 1 (February 2021)

• Record Type: Journal Article
• Authors: Huang, Peng; Zhou, Heng; Di, Shengjie; Lu, Xi
• Is Part Of: IOP conference series. Volume 638:Issue 1(2021)
• Publication Date: 2021-02
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/638/1/012082
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: The swirling chamber of the horizontal swirling energy dissipation is the key part to form the swirling flow, but the swirling chamber and the rising sill are also sensitive parts of cavitation. In order to improve its anti-cavitation performance, the side wall aeration and pressure should be increased. This paper proposes to set up an annular aeration sill in the middle and upper part of the shaft, and use a vent pipe to supplement the air under the sill to increase the aeration volume of the swirling chamber and the ascending sill. Both the monitoring data and the flow surface inspection show that the noise of the cavitation water flow in the swirling chamber of the horizontal swirling tunnel is weak. There are no obvious signs of negative pressure and cavitation. The ventilation facilities of the shaft section are effective, and the water flow is fully air-entrained. The water flow aeration can effectively protect the surface of the flow channel. This measure can effectively solve the anti-cavitation problem.