脉冲爆震外涵加力燃烧室推力特性  

Thrust characteristics of pulse detonation duct burner

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作  者:谢俊杰 郑龙席[1] 卢杰[1] 王凌羿 谭汶昊 XIE Junjie;ZHENG Longxi;LU Jie;WANG Lingyi;TAN Wenhao(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区:[1]西北工业大学动力与能源学院,西安710072

出  处:《航空动力学报》2025年第1期144-153,共10页Journal of Aerospace Power

摘  要:为了得到不同喷管与脉冲爆震外涵加力燃烧室相互作用机理,提高脉冲爆震外涵加力燃烧室增推性能,对无喷管、带七种收敛喷管、七种收扩喷管和五种二次流喷管的脉冲爆震外涵加力燃烧室进行了数值计算。结果表明:收敛喷管会反射压缩波,减缓高压工质的排出,提高轴向力增益;收扩喷管会在收敛段的基础上进一步加速气流,但在一个循环的某些时间内会使外界激波进入扩张段而造成部分推力损失;二次流喷管可以调节喷管扩张段工质参数,但也会带来一定的掺混损失。三种工况下采用二次流喷管时轴向力增益提升率最高,依次为22.11%、15.06%和15.23%。In order to obtain the interaction mechanism between different nozzles and pulse detonation duct burner and improve the thrust enhancement performance of pulse detonation duct burner,the pulse detonation duct burners without nozzle,with seven convergent nozzles,seven convergent and divergent nozzles and five fluidic nozzles were numerically calculated.The results showed that the convergent nozzle could reflect the compression wave,slow down the discharge of high-pressure working substance,and then improve the axial force gain.The convergent divergent nozzle could further accelerate the flow on the basis of the convergent section,but it could make the shock wave enter the divergent section some time in a cycle,resulting in partial thrust loss;The fluidic nozzle could adjust the working substance parameters in the expansion section of the nozzle,but it could also bring some mixing loss.When the fluidic nozzle was used under these three working conditions,the axial force gain increase rate was the highest,which was 22.11%,15.06%and 15.23%,respectively.

关 键 词:脉冲爆震涡轮发动机 脉冲爆震外涵加力燃烧室 喷管 推力特性 压缩波 

分 类 号:V231.2[航空宇航科学与技术—航空宇航推进理论与工程]

 

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