Numerical Simulation on Structural Optimization of Helmholtz Cavitation Jet Nozzle
The structural size of Helmholtz cavitation jet nozzle is large and not suitable for blockage removal by cavitation jet flushing.Moreover,there is a lack of evaluation on the jet pulse property in related studies.In this paper,the CFD numerical simulation method was used to identify the influences of structural parameters on the pulse performance of Helmholtz cavitation jet nozzle,and accordingly the structure of this type of nozzle was opti-mized.According to the results,when the inlet length is 5-15 mm,the pulse property of cavitation jet is inversely proportional to the inlet length.When the outlet length is 5-10 mm,the pulse peak and amplitude of cavitation jet are directly proportional to the outlet length,and the pulse frequency is basically not affected.For the optimal structural dimensions of the nozzle,the inlet diameter and length of nozzle are 2.5 mm and 5.0 mm,respectively;the inlet fillet,diameter and length of resonant cavity are 1.0 mm,10.0 mm and 2.0 mm,respectively;the colli-sion wall angle is 60°,and the outlet length and diameter of nozzle are 10.0 mm 3.0 mm respectively.The study results provide theoretical reference for the structural optimization design of cavitation jet nozzle in cavitation jet un-blocking technology.
Helmholtz cavitation jet nozzlepulse propertynumerical simulationstructural optimization of resonant cavityinfluence
万方数据
维普
