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ＲＬＰＧ燃烧室内大量累积的液体发射药影响燃烧过程和弹道性能．通过对ＲＬＰＧ模拟环形喷嘴液雾的碰壁过程的实验和理论研究，实验发现液雾碰壁后在壁面形成薄液膜，理论分析表明液滴碰壁后有三种可能的情况：反弹、扩散和飞溅，其中后两种情况液滴将破碎并在壁面上形成贴壁液膜．根据实验和理论研究结果，ＲＬＰＧ燃烧室内产生液体药的累积提出了新的假说．认为液体药液滴碰壁后沿壁面扩展形成贴壁液膜是产生液体药累积的主要原因之一，并提出了一个液滴碰壁模型，在拉格朗日坐标系下描述液滴的运动，根据碰壁液滴的Ｗｅｂｅｒ数来判别液滴碰壁后的三种情况，数值模拟计算了由于液滴碰壁形成贴壁液膜而产生的液体质量积累，数值模拟计算结果与Ｃｏｆｅｅ射击实验测量结果定性一致．
The large volume of liquid propellant in the RLPG combustion chamber affects the combustion process and ballistic performance. Experimental and theoretical studies on the wall-in process of RLFG simulated annular nozzle liquid mist show that the liquid mist forms a thin liquid film on the wall after it collides with the wall, and the theoretical analysis shows that there are three possible situations after the liquid drop collides: rebound, diffusion and splashing In the latter two cases, the droplets will break and form an adherent liquid film on the wall. Based on the experimental and theoretical findings, the accumulation of liquid drugs in the RLPG combustion chamber raises a new hypothesis. It is considered that the liquid medicine droplet collides with the wall and then expands to form the adherent liquid film, which is one of the main reasons for accumulating liquid medicine. A droplet wall model is proposed to describe the droplet movement in Lagrange coordinate system. According to Weber number of the wall droplet to judge the three kinds of situations after the droplet touch the wall, numerical simulation of liquid mass accumulation caused by the droplet wall to form the adherent liquid film, the numerical simulation results are qualitatively consistent with the Cofee shooting experiment measurement results.