主要研究在轴向过载下丁羟推进剂的压强耦合响应,基于双脉冲外部激励的方法,建立了 T 型燃烧器旋转过载试验系统,开展了丁羟推进剂在 0g、5g、15g 轴向载荷下的压强耦合响应试验研究,获得了丁羟推进剂在 T 型燃烧室中的燃面增益常数。...主要研究在轴向过载下丁羟推进剂的压强耦合响应,基于双脉冲外部激励的方法,建立了 T 型燃烧器旋转过载试验系统,开展了丁羟推进剂在 0g、5g、15g 轴向载荷下的压强耦合响应试验研究,获得了丁羟推进剂在 T 型燃烧室中的燃面增益常数。试验结果表明,轴向过载值越大,T 型燃烧器平均工作压强越低,包覆套筒里凝相残渣质量越多,分析认为过载下铝粉在药面过度聚集使得铝粉未充分燃烧,导致丁羟推进剂能量没有充分释放;随着轴向加速度的增加,T 型燃烧器燃面增益常数和凝相粒子浓度减小,从而造成阻尼效果明显减弱。展开更多
We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by different number of identical patches,where each patch serves as an associating site.The hard-core Lennard-Jones(LJ)po...We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by different number of identical patches,where each patch serves as an associating site.The hard-core Lennard-Jones(LJ)potential and associating interaction are incorporated into the free energies of patchy particles in phases of the uid(F),random close packing(RCP),and face-centered-cubic(FCC)crystal.A rich phase structure of patchy particles with F-F,F-RCP,and F-FCC transitions can be observed.Meanwhile,the sol-gel transition(SGT)characterizing the connectivity of patchy particles is also investigated.It is shown that,depending on the number of patches and associating energy,the F-F transition might be metastable or stable with respect to the F-RCP and F-FCC transitions.Meanwhile,the critical temperatures,critical densities,triple points,and SGT can be significantly regulated by these factors.展开更多
文摘主要研究在轴向过载下丁羟推进剂的压强耦合响应,基于双脉冲外部激励的方法,建立了 T 型燃烧器旋转过载试验系统,开展了丁羟推进剂在 0g、5g、15g 轴向载荷下的压强耦合响应试验研究,获得了丁羟推进剂在 T 型燃烧室中的燃面增益常数。试验结果表明,轴向过载值越大,T 型燃烧器平均工作压强越低,包覆套筒里凝相残渣质量越多,分析认为过载下铝粉在药面过度聚集使得铝粉未充分燃烧,导致丁羟推进剂能量没有充分释放;随着轴向加速度的增加,T 型燃烧器燃面增益常数和凝相粒子浓度减小,从而造成阻尼效果明显减弱。
基金supported by the National Natural Science Foundation of China(No.21374028 and No.21306034)the Natural Science Foundation of Hebei Province(No.B2014201103)+2 种基金the Project for Talent Engineering of Hebei Province(No.A2016015001)the Project for Top Young Talent of Hebei Provincethe Project for Top Young Talent of General Colleges of Hebei Province(No.BJ2017017)
文摘We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by different number of identical patches,where each patch serves as an associating site.The hard-core Lennard-Jones(LJ)potential and associating interaction are incorporated into the free energies of patchy particles in phases of the uid(F),random close packing(RCP),and face-centered-cubic(FCC)crystal.A rich phase structure of patchy particles with F-F,F-RCP,and F-FCC transitions can be observed.Meanwhile,the sol-gel transition(SGT)characterizing the connectivity of patchy particles is also investigated.It is shown that,depending on the number of patches and associating energy,the F-F transition might be metastable or stable with respect to the F-RCP and F-FCC transitions.Meanwhile,the critical temperatures,critical densities,triple points,and SGT can be significantly regulated by these factors.
