Study on flow field number of high pressure nozzle and entropy generation
In order to solve the comprehensive performance problems of high-pressure jet in nozzle and explore the physical field of high pressure water flow, this paper used computational fluid dynamics theory to change pressure of active flow and made numerical calculation for the high pressure nozzle. The results of further study showed that the interior entropy generation value got 2.64％ of the total entropy generation, and the entropy production could produce a “wall phenomenon”; the interior turbulent kinetic energy accounted for 13.9％ of the total turbulent kinetic energy; the turbulent kinetic energy on the surface of gradual shrink section 2, 3 increased, and added value of gradual shrink 1 in section; the turbulent kinetic energy increased with the increase of inlet pressure. Within the spout diameter range, the kinetic pressure of water flow and outlet velocity basically remained constant. The gradient of the axial kinetic pressure and velocity in gradual shrink section 1 and 2 were larger, which of gradual shrink 3 was smaller and the gradient in steady flow section 1, 2 was smallest.
high pressure nozzlecomputational fluid dynamicsentropy generationdata conclusions
国家科技期刊平台
NSTL
万方数据
维普
