HTPB推进剂高压燃烧特性研究(英文)

对HTPB三组元和四组元推进剂在2~20 MPa平均压强范围内的燃烧特性进行了实验研究。结果表明,三组元推进剂可在20 MPa以下稳定工作;压强一旦超过20 MPa,燃速压强指数将趋近于1,发动机将无法正常工作。四组元推进剂在2~20 MPa压强范围内的燃速压强指数实测在0.3左右,满足发动机使用要求。四组元推进剂稳定燃烧的最高压强临界值达到34 MPa。研究结果对超高压强固体发动机工程研制具有一定的指导意义。

Study on burning characteristics of HTPB propellants under high pressure

The burning characteristics of HTPB/AP/Al and HTPB/AP/Al/RDX propellants under 2～20 MPa average pressure were studied by strand-burner and ground firing tests.The results indicate that HTPB/AP/Al propellants can burn normally under the pressure less than 20 MPa.Once chamber pressure exceeds 20 MPa,the burning rate pressure exponent will be approximate to 1 and solid rocket motors can't work normally.The burning rate pressure exponent of HTPB/AP/Al/RDX propellants under the pressure of 2～20 MPa is about 0.3 according to the experimental measurement.Under this condition,solid rocket motors can work well.The critical maximum pressure under which HTPB/AP/Al/RDX propellants can burn normally is 34 MPa.The result has the guidance meaning for the engineering development of solid rocket motors operating under ultra high pressure.