摘要
制备了HNIW/GAP二元混合物,在6～15MPa压强范围测试了其静态燃速,研究了HNIW含量和压强对混合物燃速的影响;分析了HNIW粒径与预热层厚度对HNIW/GAP混合物燃速的影响规律;基于Relay-Race模型对燃速进行了模拟;分析了燃速控制机理,并采用DSC对HNIW/GAP混合物进行了热分析研究。结果表明,Relay-Race模型可以预测HNIW低含量时的部分燃速,在6～9MPa下,混合物燃速随HNIW含量的增加而增大,在12～15MPa下,混合物燃速随HNIW含量增加先减小后增大;在压强低于约0.2MPa下,粒径62μm的HNIW颗粒低于预热层厚度,不经历自持燃烧,增大HNIW粒径可以促进混合物燃烧;在HNIW与GAP质量比为1∶1条件下,模拟的燃速增幅会随着粒径的增大而减小。当HNIW质量分数在0～30%时,混合物燃烧过程的反应控制区域由GAP转移至HNIW燃烧区域,从而导致燃速变化。
HNIW/GAP binary mixture was prepared. Its static burning rate was measured in the pressure range of 6-15 MPa. The effects of HNIW content and pressure on the burning rate of mixture were investigated. The influence rule of HNIW particle size and preheated layer thickness on the burning rate of HNIW/GAP mixture was analyzed. The burning rate was simulated based on Relay-Race model. The mechanism of controlling burning rate was analyzed and the thermal analysis study of HNIW/GAP mixture was performed by DSC. The results show that the Relay-Race model can predict the partial burning rate of HNIW at low HNIW content. The burning rate of the mixture increases with increasing the HNIW content at 6-9 MPa. The burning rate of the mixture decreases firstly and then increases with increasing the HNIW content at 12-15 MPa. When the pressure is lower than about 0.2 MPa, the particle of HNIW with the particle size of 62μm is lower than preheated layer thickness and does not undergo self-sustained combustion and the combustion of mixture can be promoted by increasing the particle size of HNIW. The simulated amplitude of mixture burning rate decreases with the increase of HNIW particle size under the condition of mass ratio of HNIW/GAP as 1∶1. The reaction controlling zone of mixture combustion process transfers from GAP combustion zone to that of HNIW with the HNIW mass ratio changing from 0 to 30%, which results in the change of burning rate.
引文
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