针对液体火箭发动机喷注器下游燃料和氧化剂两相流场分布的实验研究，研制了能同时对其流强及混合比进行测量的两相探针，并对其进行了标定。利用两相探针对不同反压下同轴式喷嘴下游的流强和混合比分布所进行的试验研究，证明探针的设计是成功的 Aiming at the experimental study on the distribution of fuel and oxidant phases in the downstream of a liquid rocket motor injector, a two-phase probe capable of simultaneously measuring its flow rate and mixing ratio was developed and calibrated. The experimental study on the flow intensity and mixing ratio distribution of the coaxial nozzles under different backpressures by using the two-phase probe proves that the design of the probe is successful