CAJ | 학술논문

利用数值模拟方法，针对轴对称喷管，研究了主射流对辅助射流的影响，以及主射流流量、辅助注气缝宽度等参数对喷管流动和性能的影响规律。数值模拟结果表明，与普通喉道注气相比，喉道辅助注气可以在喉道下游产生更大的射流穿透深度和回流区，具有更好的喉道面积控制效果。随着主射流流量增大，喉道辅助注气流量逐渐增大，有效喉道面积逐渐减小。主射流流量较大时，可以形成开放的回流区，使喷管实际的膨胀比减小，提高喷管的推力性能。
이용수치모의방법，침대축대칭분관，연구료주사류대보조사류적영향，이급주사류류량、보조주기봉관도등삼수대분관류동화성능적영향규률。수치모의결과표명，여보통후도주기상비，후도보조주기가이재후도하유산생경대적사류천투심도화회류구，구유경호적후도면적공제효과。수착주사류류량증대，후도보조주기류량축점증대，유효후도면적축점감소。주사류류량교대시，가이형성개방적회류구，사분관실제적팽창비감소，제고분관적추력성능。
The flow fields of axisymmetric nozzles with assisted reinjection are simulated numerical- ly. The effects of injection flow and assisted reinjection slot width on nozzle flow and internal performance as well as the effect of throat injection flow on throat assisted reinjection flow are investigated. The results show that it gets larger recirculation regions in the downstream of throat and has better control effects for throat area using assisted reinjection than the usual throat injection nozzle. The throat assisted injection flow increases gradually, but the effective throat area decreases, along with the increase of injection flow. An open recirculation region can be formed when it has a larger injection flow, thus the actual expansion ratio of nozzle is decreased, and the thrust performance of nozzle is improved.