The cutting test of HTPB propellant by pre-mixed abrasive water jet was carried out. Based on the fixed and moving cutting modes, the safety and cutting efficiency in the cutting process were theoretically and verified, and the feasibility conclusion was obtained. The safety test results show that the cutting method effectively reduces the outlet pressure, and the impact pressure is far lower than the impact sensitivity under the premise of ensuring the cutting ability. The internal temperature rise is not obvious, so the safety is sufficient. The research results also show that at 90% confidence level, the safety of cutting is not less than 99.52%. The cutting efficiency test results show that the addition of abrasive particles greatly improves the cutting efficiency of the jet. When the outlet pressure is maintained above 30MPa, and the abrasive concentration is not less than 50%, the abrasive water jet is twice of the cutting efficiency of the pure water jet under the same conditions. The study shows that the pre-mixed abrasive water jet has a strong cold erosion grinding effect, which can meet the cutting operation of the three-component HTPB propellant in terms of safety and efficiency.
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