Numericalsimulationand Experimental Study On Three-Dimensionalinternalflow Field In Bidirectionalblade Turbines

Marine current energy is a kind of clean and renewable energy. Atpresent, the research on marine current energy is still in the primary stage.As an important part of theory of Venturi tube accelerate and its yawingcorrected effect, two-way blade turbines should be taken a furtherresearch, which could refine the theory and provide some theory basis forthe development and utilization of the marine current energy.Firstly, the paper discusses the utilization of energy in the world,which concludes that the world energy use will turn to be clean andrenewable with the development of economic. The internal flow field ofthe turbine is less discussed in present. Secondly, the initial conditionswhich are likely to affect the field simulation results of internal two-wayblade turbines through FLOW-3D are analyzed by the sensitivity analysis,and we get the relatively reasonable initial conditions for the numericalsimulation. Again, the authenticity of the simulation results is analyzedthrough the experiment. Then, the profile of the flow fields in the two-way blade turbines are analysis and the basic characteristic of theflow field is get; Then, specific characteristics of the two-way bladeturbines of certain areas in the internal flow field is analyzed,whichconcludes that there is a high degree of symmetry and similarity in theinternal flow field. Furthermore, in view of special phase, through theanalyzed of sensitivity analysis of flow field in the internal two-wayblade turbines, we found that the internal flow field is not changedsignificantly, but the turbulent energy and pressure is relatively moresensitive. Finally, through the comparison of the flow field in severaldifferent yawing angle, it is concluded that the two-way blade turbinesitself has certain role of correcting flow deviation. Two-way blade turbinedesign is reasonable.