介绍了整体级概念及强制偏流喷管，分析了喷管内的流场与外界压力变化的关系。在实验参数相同的条件下进行了与普通锥形喷管的对比实验，并测定了在发动机工作过程中扩散段的压力变化。结果表明，该喷管具有良好的推力性能和自动补偿外界压力变化的能力。 The concept of the whole class and forced drift nozzle were introduced. The relationship between the flow field inside the nozzle and the change of external pressure was analyzed. Under the same experimental parameters, the experiments with ordinary conical nozzles were carried out. The pressure variations in the diffuser section during engine operation were also measured. The results show that the nozzle has good thrust performance and the ability to automatically compensate for changes in external pressure.