Optimization of Flow Channel Structure in Air Atomization Nozzle Based on Response Surface Method
In order to improve the atomization performance of air atomizing nozzles,the combination of numerical simulation,response surface method and experiment is adopted in this study for the internal flow path structure of external mixing air atomizing nozzles.By taking the external contraction Angle α,internal contraction Angle β and the outer length L of the gas phase as optimization variables,and taking the exit velocity U of the nozzle as the target response,the optimal design of the internal flow path structure of the nozzle is carried out.The particle size and velocity of the spray field are measured experimentally by hot-wire anemometer,particle size analyzer and laser Doppler velometer to verify the accuracy of the numerical simulation and response surface method optimization results.The results show that the optimized response surface method increases the nozzle gas outlet velocity by 17.44 m/s and reduces the energy loss by 39.51％.The gas distribution around the spray liquid column is more uniform,which helps to increase the gas-liquid relative kinetic energy.After the optimized nozzle experiment measurement,it is found that the droplet particle velocity increases,the particle size decreases,the distribution peak value increases and the distribution range becomes more concentrated,thus verifying the effective feasibility of the combination of numerical simulation,response surface method and experiment.
Air atomizing nozzleResponse surface methodInternal flow channel optimizationNumerical simulationSpray field
万方数据
维普
