响应面法优化球扁药脱硝工艺研究OA北大核心

To explore the influence of process parameters on the denitration reaction of spherical gun propellant,Box-Behnken response surface methodology was used to optimize the denitration process of spherical gun propellant.On the basis of single factor experiments,the effects of denitration agent concentration,reaction temperature,and reaction time on explosion heat of nitro gradiently distributed spherical gun propellant were analyzed.The microstructure composition of nitro gradiently distributed spherical gun propellant was studied using micro Raman technology.The constant-volume combustion performance of nitro gradiently distributed spherical gun propellant before and after denitriation was investigated using a closed bomb test.The results of single-factor experiments and response surface methodology optimization both indicate that the primary and secondary process parameters affecting the performance of nitro gradiently distributed spherical gun propel-lant are reaction temperature,reaction time,and denitration agent concentration.The correlation coefficient between deni-tration process parameters established by response surface methodology and the explosion heat of nitro gradiently distributed spherical gun propellant is 0.978 5.The explosion heat obtained from experiment is basically consistent with the explosion heat predicted by the response surface model,indicating that the optimized response surface model is reliable and effective.Raman characterization results indicate that the distribution of nitrate ester groups on the surface of nitro gradiently distri-buted spherical gun propellant shows an increasing gradient from the surface to the interior.After adjusting the process parameters,the explosive heat and combustion progressivity of nitro gradiently distributed spherical gun propellant could be controlled over a large range.It provids technical and theoretical supports for the precise control of the performance of nitro gradiently distributed spherical gun propellant.