Optimization Design Of DCSGT330-175×9Multistage Energy Recovery Hydraulic Turbine

With the development of economy, the energy issues have already become thefocus of the world. Turbine is power fluid machinery with blades, which can furtherrecycling mechanical energy be contained in the working fluid to reduce per-outputenergy of a positive role. In the energy problem highlights today, hydraulic turbinemachinery as an energy recovery device, not only conforms to the national energydevelopment in industrial policy and to realize the sustainable development needs,but also plays an important role in energy saving, environmental protection. So itthat improve the level of comprehensive utilization of resources, environmentalprotection, and the development of a recycling economy is researched and improvedthe performance has the very vital significance.At present, the design theory of energy recovery hydraulic pump and turbine isnot mature. Just the principle of work, the energy recovery hydraulic pump andturbine are equivalent super low specific speed turbine, change the energy ofworking fluid into rotating mechanical energy. But compared with the multistageenergy recovery hydraulic pump and turbine, it has similarities with multistage pump.Traditionally, consider the reversal of the pump as energy recovery hydraulic pumpand turbine, but flow state and running condition of the reversal of the pump is notfully complying with the energy recovery hydraulic pump and turbine, thereforeperformance relatively poor. So development of high performance energy recoveryhydraulic pump and turbine can be more fully and effectively recycling energyresources, the potential resource advantages into economic and social benefits, has acertain academic value and practical significance.According to the prophase research results, this essay design guide vane andoptimization design head turbine runner that the energy recovery hydraulic pumpand turbine of DCSGT330-175×9(H=1500m、Q=330m3/h、n=3680r/min、N=9), usingCFD simulation technology to explore the internal flow of it, to get the betterperformance and requirements guide vane and the best designing scheme of headturbine runner, in order to make the energy recovery hydraulic turbine has higherrecovery performance and wider range of normal operation.The main research contents and creative achievements are as follows:1. According to the existing hydraulic model of multistage energy recoveryhydraulic turbine and the design method of guide vane of multistage pump andhydraulic turbine guide vane, and an another guide vane are designed. Designed and optimized the guide vane in ignore clearance flow, using CFD flow field simulationtechnology in two kinds of cases of ignore clearance and clearance flow, through tonumerical simulation and performance prediction for the typical working conditionsof the flow field of the optimized guide vane turbine the better vane of the turbineare obtained.2. Based on the statistics and orthogonal theory and combined with the threemain factors influencing the design of turbine runner which contains the blade inletangle,the number of blades, the subtended angle of the blade. Using the orthogonaldesign method of three factors and three levels, by range analysis of numericalsimulation of the L9(34)orthogonal designing scheme, get the factors influencing thedesign of turbine runner how influence the hydraulic performance of the turbine ofDCSGT330-175×9, the primary and secondary sequence affecting efficiency andflow of the three main factors were obtained respectively. Finally, the best designscheme of the head turbine runner was got.3. Through clearance flow influence the Performance of turbine, provide thefoundation for improvement in the energy recovery hydraulic pump and turbine ofthe structure of annular seal and clearance.