The experimental investigation of inception cavitation of liquid-solid two phase turbulent flow has been carried out in a two dimensional hydraulic tunnel. The experimental result shows that the cavitation existing in...The experimental investigation of inception cavitation of liquid-solid two phase turbulent flow has been carried out in a two dimensional hydraulic tunnel. The experimental result shows that the cavitation existing in the sediment laden flow is different from that in the clear water. We also found that the inception cavitation of sediment laden flow only has a weak relation with the shape of the experimental model in which the cavitation originated, yet it has direct relation with the density of sediment concentration in the flow and the diameter of the sediment particles and the distribution of particle sizes. The results given in the paper could be used for engineering designing and hydraulic machine making.展开更多
Numerical and experimental study is carried to investigate the cavitation behavior in the turbulent flow around a NACA16-012 hydrofoil. The Navier-Stokes Equations for compressible fluid are adopted to simulate the ov...Numerical and experimental study is carried to investigate the cavitation behavior in the turbulent flow around a NACA16-012 hydrofoil. The Navier-Stokes Equations for compressible fluid are adopted to simulate the overall motion and dynamical characteristics of the cavity flow, while the bubble dynamics is used to calculate the motion and growth of nuclei inside the cavity. Cavitation experiment for the hydrofoil is carried out in a water tunnel of CSS-RC, the phenomenon in the experiment is recorded and analyzed with high speed photographic technique.展开更多
文摘The experimental investigation of inception cavitation of liquid-solid two phase turbulent flow has been carried out in a two dimensional hydraulic tunnel. The experimental result shows that the cavitation existing in the sediment laden flow is different from that in the clear water. We also found that the inception cavitation of sediment laden flow only has a weak relation with the shape of the experimental model in which the cavitation originated, yet it has direct relation with the density of sediment concentration in the flow and the diameter of the sediment particles and the distribution of particle sizes. The results given in the paper could be used for engineering designing and hydraulic machine making.
基金This work is supported by the National Natural Science Foundation of China under the grant number 58909464
文摘Numerical and experimental study is carried to investigate the cavitation behavior in the turbulent flow around a NACA16-012 hydrofoil. The Navier-Stokes Equations for compressible fluid are adopted to simulate the overall motion and dynamical characteristics of the cavity flow, while the bubble dynamics is used to calculate the motion and growth of nuclei inside the cavity. Cavitation experiment for the hydrofoil is carried out in a water tunnel of CSS-RC, the phenomenon in the experiment is recorded and analyzed with high speed photographic technique.
