Simulation and Optimization of Structural Parameters of Nozzle for Abrasive Water Jet Stubble Breaking
DOI:
https://doi.org/10.54097/kxb79g81Keywords:
Abrasive water jet, Stubble breaking, Nozzle, Flow field simulation, Parameter optimizationAbstract
Aiming at the demand for removing maize stubble in sticky soil areas of Southwest China, this study conducts simulation and optimization on nozzle structural parameters to improve the impact capacity and energy concentration of abrasive water jet. With garnet particles of 0.2 mm in diameter and an abrasive inlet velocity of 15 m/s as basic working conditions, the single-factor simulation method is adopted to investigate the influences of outlet length, convergence angle and mixing chamber length on jet velocity, beam convergence and energy distribution. The results show that the optimal parameter combination is determined as the outlet length of 20 mm, convergence angle of 30° and mixing chamber length of 30 mm. Under this structural configuration, the impact velocity of the jet reaches 180 m/s at a standoff distance of 200 mm. The jet features good beam convergence and slow kinetic energy attenuation along the path, which can effectively enhance the crushing performance of maize stubble. The research findings can provide theoretical references for the design and engineering application of nozzles used in agricultural abrasive water jet stubble breaking.
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