Fluctuating pressure characteristics of flow on flume bottom with different aeration conditions
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Abstract:
Aiming at the change of pulsating pressure characteristics after aeration of water. Based on the test results of the rectangular chute hydraulic model, the variation laws of the standard deviation of pulsating pressure on the chute base-slab of different gas-absorbing facilities and different ventilation methods is analyzed. The results show that, in the condition of self aeration, the fluctuation pressure of the bottom plate is smooth along the curve; Forced aeration water flow pulsating pressure increased significantly, especially in the impacted area was a single peaklaw. Three kinds of aeration facilities: only set the bottom aerator, only set the lateral aerator and the bottom aerator and the lateral aerator set at the sametime, the effect of only set the lateral aeration on the pulsation of the bottom plate is the least. For the same bottom aerator, increasing the flow rate, increasing the vent area and decentralized vent holes will increaseing the pressure of the bottom chute.
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