When numbers of the innernozzle are enough, plug nozzle has less size, less weight and higher thrust efficiency than the bell nozzle under same area ratio.
在单元数足够多时，环簇式塞式喷管可比相同面积比的钟形喷管的尺寸更小，重量更轻，推力效率更高；
2
The results show that throat diameter of the innernozzle is the most important design parameter influencing structure size of the annular clustered plug nozzle.
结果表明，内喷管喉径是影响环簇式塞式喷管尺寸大小的最主要设计参数；
3
The computing method of differential throttling and the analytical process of thrust vector of innernozzle and plug were introduced. The generated moments of pitch were given.