The Axial-flow Turbine Downhole’s Hydrodynamic Performance Research And CAD Technology

With the development of oil exploration and development in complex geological conditions, deep wells and ultra deep wells are the growing number of increasingly high demand for the average ROP of the drilling technology, drilling quality and drilling. Improving ROP and reducing drilling costs have been as the main subject of the current drilling workers, in order to ensure drilling quality, improving the efficiency of underground rock can be used advanced downhole tools, new materials, advanced technology. computer assisted drilling has become an important direction of research, how to improve the conversion efficiency of the axial flow water turbine power has become a more and more impotant, thereby,to improving the hydraulic performance of axial flow turbine is not only has engineering significance, but also has practical value.Compared with the developed Western countries, there are still a large gap between downhole axial flow turbine hydrodynamic performance in China’s oil exploration and the development of technology. The research of the performance of the axial turbine is still in the stage of development. How to improve the power conversion efficiency of axial flow turbine water is still in the experimental and explore state, which is resulted in a product design is not only long life cycle, high cost, and the conversion efficiency is not ideal. With the continuous development of computer science and technology, numerical simulation techniques have been widely used in the field of fluid design, analysis, and so on. It can be shorten the product design cycle, thereby reducing their cost of production.The main content of this thesis:(1) the blade geometry parameters (Ye Shan, throat diameter, the axial height, leaf number, and so on);(2) the trailing edge shape of the underground performance of axial flow turbine hydrodynamic;(3) blade profile(Bezier, high order polynomials, B-spline curves, NURBS curve, etc.) influences of the axial flow turbine hydrodynamic performance;(4) we can use of special software, computer-aided design to explore the many factors that influence the establishment of catchment dynamic design, design, and fluid dynamic analysis in one underground hydrodynamic axial flow turbine model, after studing the axial hydrodynamic performance of a turbine blade geometry parameters and blade profile.Through the research, the main conclusions is:1. Select the specific structure of the turbine is designed to simulate the axial flow turbine operating conditions using Fluent software, and a more detailed analysis of the simulation results obtained specific distribution of the turbine internal flow field and structural parameters of the turbine work performance and the law.2. the hydraulic design of the turbine can be Calculated.Using the the Visual Basic programming and developed a turbine blade design process to complete the CAD modeling interface program, which are greatly reducing the modeling time. The secondary development of the software can be connected with Fluent in turbine design on the basis of the calculation procedures for the design of the turbine operating point, which is greatly shortening the product computation time and the design cycle.3. Design three-dimensional turbine blades, mechanical properties, to predict the axial flow turbine hydrodynamic theory is consistent with the experimental simulation to design a set of hydraulic design, software design, fluid dynamics analysis of the three integration.