Numerical Simulation And Design Of The Porous Flowmeter

Flow rate is an important parameter in the process of industrial production. Flowmeters are widely used in human production and life. With the rapid development of social industry, the emergence of a varity of complex working conditions put forward new requirements for flowmeters.Compared with other throttling flowmeter, porous flowmeter has outstanding advantages for its lower permanent pressure loss and the flow patter improvement for the flowing field damaged by throttling, which can improve flow patter by greatly save energy consumption in industrial applications. So it has great application value. However, the porous flowmeter should be designed according to different conditions. The lack of guiding criteria for structural parameters design and performance optimization limits its application range to some extent. Therefore, the orifice of the porous flowmeter is studied in this paper and the methods of both numerical simulation and experimental verification are adopted to probe the impact of key factors on the design optimization, providing guidance for the design of porous flowmeter. The main research content and conclusions are as follows:(1) The number and structure of the function pore for the porous flowmeter are studied. On the condition of the room temperature water with flow rate of1m/s, the number, distribution and structure of function pores in the porous flowmeter with the pipe diameter of50mm and β=0.35are studied by numerical simulation. The results show that the optimal design for the porous flowmeter contains13function pores, with one in the middle and the others distributed on the outer circumference of the16mm and26mm circles.(2) Combined with industrial applications, comparing the results of different diameters porous meter indicates the principles of geometric similar can’t simply apply to design the porous flowmeter; the effect of the equivalent diameter ratio of the pressure loss ratio and the downstream straight pipe length was studied.(3) The influence of pressure recovery rate affected by rotation symmetry is analyzed by the numerical simulation, which show that the function pore quantity around outer circle should be increased as possible to reduce rotation symmetry angle in the design of porous flow meter.(4) Through the study of the function of porous flow meter hole thickness shows that with the different condition the thickness of the porous flowmeter is not the same.(5) The experimental platform of the porous flowmeter is set up to verify one of the selected numerical results. The experimental results are essentially in agreement with the numerical calculation, which verify the feasibility and effectiveness of the program.