Prismatic Shaft Compressors Construction Design And Dynamic Flow Field Simulation Research

With the rapid development of the national economy and industries, the compressor is widely used in various industries as the major technologies and equipment supporting products of national economy. As an important source of power, air has clean, transportation convenient and other significant features. For this reason, the air compressor is widely used in machinery, metallurgy, electronic power, medicine, packaging, chemical, food, mining, textiles, transportation and many other industries in recently years. Air compressor transfers the energy by the relevant energy conversion devices. Generally energy conversion is understood as the mechanical energy into kinetic energy.As the extensive use of air compressors, people began to due more attentions to the cavity of the air flow in order to better understand the compressor's operating conditions. Because of the body cavity space is closed and very small, especially the fluid medium is air which is difficult to track the actual movement of gas alone, so the real test of the measurement is difficult to obtain operating conditions of the relevant dates. With the development of the computer, we can establishment of the actual mathematical model to simulate the working process of the instantaneous air compressor in order to make up for lack of experimental research. Numerical simulation method can be clearly recorded intake inlet conditions, air compression, as well as exhaust the situation.In this paper, the design of theoretical knowledge on the compressor's understanding of the structure in the twin-screw compressors, based on its short comings in type line, we designed prismatic shaft compressor which is superior in the type line, making more efficient and structure a more reasonable arrangement of convenience. Using the CATIA software to build geometric models of air compressors in view of the structure for the design, and using the fluid dynamics (CFD) Fluent software, dynamic mesh, select the appropriate method of calculation model and simulate the flow of air compressor intake, compression the gas flow and exhaust gas flow process. Have different running times (and the different sports locations) transient pressure field, temperature field, density field and velocity field distribution for the results. Different speeds and under the same operating position of the pressure field, temperature field, density field and velocity field obtained were compared with the rotor speed increases, the cavity air flow rate, pressure, temperature will increase with. Export pressure also increased with the increase of speed.Dynamic mesh for the calculation of the geometric shape of the region changes with time for transient dynamic simulation of fluid dynamics can be leveraged to capture edge instantaneous flow field within the air compressor change, especially in the analysis of the formation of vortex chamber, exercise, consolidation and other flow characteristics can be better reflected. Fluent dynamic grid-based design can provide a theoretical basis for improvement, and can shorten the design cycle.