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在突扩突跌掺气设施中 ,为保证掺气效果 ,增加底空腔和侧空腔的长度 ,加设折流器是有效的工程措施。试验证明 ,折流器坡度和高度对空腔长度均有影响 ,较高的折流器明显增加空腔长度 ,且使底空腔与侧空腔贯通 ,有利于底空腔充分掺气。回溯水流使底空腔变短 ,有效空腔长度是影响掺气效果的重要因素。在空腔长度的计算中应综合考虑 ,顶板坡角 ,跌坎挑角和折流器体型的影响 ,得出的计算公式有实际应用和理论意义。
In sudden expansion aeration facilities, in order to ensure the aeration effect, increase the length of the bottom cavity and side cavity, adding baffle is an effective engineering measures. Experiments show that the baffle slope and height have an impact on the length of the cavity, a higher baffler significantly increases the length of the cavity, and the bottom cavity and the side cavity through, is conducive to fully aerated bottom cavity. Backdating the flow to make the bottom cavity shorter, the effective cavity length is an important factor affecting the aeration effect. The cavity length calculation should be considered, the roof slope angle, tilt angle and baffle body deflection, the formula has practical and theoretical significance.