| 导流洞改建为孔板泄洪洞水力学问题研究 |
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| 引用本文： | 李忠义,李霞.导流洞改建为孔板泄洪洞水力学问题研究[J].水利学报,1997(2):1-7,13. |
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| 作者姓名： | 李忠义 李霞 |
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| 作者单位： | 中国水利水电科学研究院水力学所 |
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| 基金项目： | “八五”国家科技重点项目的课题 |
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| 摘 要： | 本文对导流洞改建为孔板泄洪洞时的孔板体型与阻力系数的关系、出口水流收缩系数的计算、泄流能力的计算、雷诺数对孔板初生空化数的影响、初生空化数与体型的关系等进行较深入的研究，提出了系统的计算公式和设计方法。文中提出的消涡环不仅抑制了孔板上游的角隅漩涡，并且还收到了增加阻力系数和结构强度的效果。
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| 关 键 词： | 孔板 泄洪洞 空化 水力计算 导流洞 |
Study on hydraulic problems of spillway tunnels with orifices reformed from diversion tunnel |
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| Li Zhongyi\ Chen Xia\ Chen Meifa.Study on hydraulic problems of spillway tunnels with orifices reformed from diversion tunnel[J].Journal of Hydraulic Engineering,1997(2):1-7,13. |
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| Authors: | Li Zhongyi\ Chen Xia\ Chen Meifa |
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| Affiliation: | China Institute of Water Resources and HydroPower Research |
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| Abstract: | The relationship between the configuration of orifices and the hydraulic resistances, the coefficient of contraction at the outlet,the discharge capacity, and the effect of Reynolds number as well as the orifices configuration on incipient cavitation number are studied in detailed in the model test.The formulas for calculation of hydraulic design for this kind of tunnel are suggested.The vortex suppressing ring proposed by the authors not only play the role of restraining the occurrence of cavitation but also enhancing the effectiveness of energy dissipation and strengthening the structure of the orifices. |
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| Keywords: | spillway tunnel orifices hydraulic design cavitation vortex suppressing ring |
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