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为得到可逆流体转换器(RFD)喷嘴型式及锥角、对称关系、吸水室型式等结构关系的优化结果,采用三维定常流数值模拟对RFD进行了计算,计算结果表明RFD最佳结构型式及参数为:柱形吸水室、对称喷嘴两阶段扩散型式,下喷嘴扩散角β小于5°～6°,相对嘴间距Lc/dt=0.8～1.1;压冲阶段,RFD有微量引射或无引射时水力效率最高,锥形喷嘴在各阶段均表现出较大的过流流量.与实验结果进行对比,验证了数值方法的可靠性,说明采用定常流方法进行非定常状态下的工作元件结构设计,可以作为工程应用RFD的优化设计方法.
In order to obtain the optimization results of the nozzle type, the cone angle, the symmetry relationship and the type of water-suction chamber of the reversible fluidic converter (RFD), the numerical simulation of the three-dimensional steady flow was used to calculate the RFD. The calculation results show that the optimal RFD structure and parameters Is as follows: a cylindrical water-absorbing chamber and a symmetrical nozzle with a two-stage diffusion type. The lower nozzle diffusion angle β is less than 5 ° to 6 ° and the relative nozzle spacing Lc / dt is 0.8 to 1.1. The hydraulic efficiency is the highest, and the conical nozzles show a large overcurrent flow at all stages.Compared with the experimental results, the reliability of the numerical method is verified, and the structure design of the working elements under the unsteady state by using the steady flow method , Which can be used as the optimal design method of RFD for engineering application.