CAJ | 학술논문

利用数值模拟方法，研究了激波控制矢量喷管的流场结构与工作特性，分析了射流流量、外流马赫数及落压比对喷管流动和性能的影响。结果表明：随着射流流量的增大，射流对主流产生的阻碍作用增大，使得注气缝上游的高压分离区增大，上、下壁面压差增大，矢量角增大；但射流流量过大时，激波会影响下壁面的压力分布，使喷管推力矢量性能降低。外流马赫数增加使喷管出口附近及上壁面注气缝下游壁面的压力降低，因此上、下壁面的压差减小，喷管的推力矢量性能降低。随着落压比的增大，注气缝上游的分离激波位置后移，注气缝下游分离区内的相对压力降低，使上、下壁面的压差减小；另外，喷管工作状态从过膨胀状态向欠膨胀状态转变时，压差产生的推力增大，喷管的推力矢量件能降低．
이용수치모의방법，연구료격파공제시량분관적류장결구여공작특성，분석료사류류량、외류마혁수급락압비대분관류동화성능적영향。결과표명：수착사류류량적증대，사류대주유산생적조애작용증대，사득주기봉상유적고압분리구증대，상、하벽면압차증대，시량각증대；단사류류량과대시，격파회영향하벽면적압력분포，사분관추력시량성능강저。외류마혁수증가사분관출구부근급상벽면주기봉하유벽면적압력강저，인차상、하벽면적압차감소，분관적추력시량성능강저。수착락압비적증대，주기봉상유적분리격파위치후이，주기봉하유분리구내적상대압력강저，사상、하벽면적압차감소；령외，분관공작상태종과팽창상태향흠팽창상태전변시，압차산생적추력증대，분관적추력시량건능강저．
The flow field and the operating characteristics of a shock wave control vectoring nozzle have been investigated with a numerical simulation method. The influence of flow, external flow Mach number and pressure ratio on nozzle has been studied. The results show that with the increase of the secondary flow, it has more interference on the mainstream, making the upstream of gas injection port with a higher pres- sure, the differential pressure between upper and lower surface raise, and thrust vector angle increases. If the secondary flow was too big, it would have an impact on the lower surface and reduce the performance. With the increase of Mach number, the pressure of nozzle exit was reduced, so did the pressure of upper sur- face. The pressure between upper and lower surface decreased, thus reducing the performance of thrust vec- tor nozzle. As the NPR increased, the separation shock in front of gas injection port moved backward, mak- ing the downstream separation of gas injection port with a lower relative pressure, so the pressure between upper and lower surface decreased, and the performance of thrust vector nozzle decreased. On the other side, the work state of nozzle changed from higher expansion to lower expansion of the state, so the thrust changed with pressure increased, and the performance of thrust vector nozzle decreased.