This paper proposes a method to apply laser heating to solid propellant combustion in order to evaluate the heat feedback rate from flame to burning surface, Hf. A burning surface was irradiated with a laser in a pressure-regulated test chamber. From a simple heat balance model on the burning surface, the burning rate was dependent on the laser power density, and the values of Hf were determined using the dependence. HTPB/AP based solid propellant samples were irradiated at laser power densities ranging from 0.3 to 0.8 W mm-2.The experiments showed that the burning rate increased with the laser power density and that Hf values were successfully evaluated and were almost monotonously augmented with back pressure and ranged from 1.0 to 2.0 W mm-2.
本論文では, 固体推進薬燃焼における火炎から燃焼面への熱のフィードバック量（Hf ）を評価するためにレーザ加熱を適用することを提案する。本方式では, 圧力を一定に保った燃焼容器に固体推進薬を入れ燃焼面にレーザを照射し, 燃焼速度とレーザパワー密度との関係からHf を算出するのである。HTPB/AP系固体推進薬をサンプルとしてレーザパワー密度を0.3〜0.8 W mm-2の範囲で変化させたところ, 燃焼速度はレーザパワー密度に依存しHf を算出するに至った。Hf は背圧と共にほぼ単調に増加しその範囲は1.0〜2.0 W mm-2であった。
Solid propellant, Combustion, Heat feedback rate, Laser