Global sensitivity analysis for particulate fouling performance based on metamodel of optimal prognosis
Sensitivity analysis can identify important and irrelevant variables,effectively filter the data to reduce the complexity of the model and assistant optimization design.In this paper,the particulate fouling in the heat transfer tube with an inserted rotor was taken as the research object,and the Eulerian-Eulerian model and the particulate fouling model were used to conduct numerical experiments to obtain the training data space.The global sensitivity analysis was carried out based on the metamodel of optimal prognosis,and the influence degree of particle diameter,particle concentration,inlet velocity,and inlet temperature was quantitatively compared.The analysis of four deposition rates showed that the inlet temperature had the most significant influence on diffusion deposition and thermophoretic deposition,and the total effects were 65.4%and 58.6%,respectively.The influence of particle diameter on turbulent flow deposition and gravity deposition was the most obvious,and the total effects were 53.9%and 75.0%,respectively.On this basis,the total,main,and interaction effects of deposition rate and fouling resistance were further analyzed.The results showed that particle diameter had the greatest influence on deposition rate and fouling resistance,and the total effects were 52.7%and 60.2%,respectively.The sum of interaction effects of each input variable on the deposition rate and the fouling thermal resistances were 59.7%and 42.5%,respectively.With the increase in the four input variables,both deposition rate and fouling resistance increased.In order to solve the fouling problem of a heat transfer tube with an inserted rotor,it was necessary to first consider reducing the particle diameter while controlling the fluid temperature and flow rate.
万方数据
维普
