Two most common ignition manners, external radiation and internal heat, were used to ignite the material.
采用两种最常见的点燃方式，即外部辐射着火和内部受热着火，对材料多角度研究其燃烧特性。
2
For external radiation ignition manner, a series of small-scale fire tests were conducted in a cone calorimeter in accordance with ISO 5660. Heat release rate and mass loss rate were measured.
In order to improve working reliability, increase grain mass, and achieve ignition and stage separation at the same time, a successful method is to apply an external igniter to solid rocket motor.