专刊的详细说明:本专刊由于使用热膨胀性的塑料筒作为固体火箭推进剂的燃烧限制剂,从而使固体火箭发动机既廉价,又简易,且当把推进药装填到火箭发动机腔体时的装药效率高。一般地,为使火箭工作时,获得予先规定的推力——时间关系,将火箭推进剂欲燃烧部分之外用不燃烧、不易燃烧或者缓燃的材料,即限燃剂加以包覆。作为限制燃烧的方法大致可分为下述三种:用各种方法按所规定的尺寸对推进剂的后侧面及端面等进行包覆,或者在予先成型的塑料等限燃剂管子里注入推进剂。并使之固化,再把这种推进剂装填到火箭腔体中的这种方法称为自由状态方式,用树脂充填限燃剂和腔体内壁之间隙的滤筒式粘结方式及在腔体内面涂覆树脂后,注入推进剂,并使之固化的贴壁浇注方 Special Feature: This special issue is due to the use of a thermally expandable plastic cartridge as a combustion limiter for solid rocket propellants, making the solid rocket motor both inexpensive and easy to charge, and when charging the propellant into the rocket engine cavity efficient. Generally, in order to obtain the predetermined thrust-time relationship for the operation of the rocket, the rocket propellant is coated with a non-flammable, non-flammable or flame retardant material, ie, a flame retardant, in addition to the portion to be burned. As a method of restricting combustion, there are roughly divided three types: a method in which a rear surface, an end surface and the like of a propellant are coated with a predetermined size by various methods, or a restrictor tube such as a plastic Propellant. And then to cure, and then the propellant loaded into the rocket cavity this method is called the free state mode, with resin filling the gap between the limiter and the cavity filter cartridge bonding and in the cavity After coating the resin, inject the propellant and allow it to cure