CAJ | 학술논문

超音速喷管由收缩和扩张两段组成，是高速风洞中获得超音速流动的重要部件。对于超音速喷管收缩段设计方法的研究较多，但尚未见到喷管收缩段的几种设计型面曲线如何与扩张段合理匹配问题的研究。针对以上的问题，利用CFD数值模拟方法对几种收缩曲线与扩张段匹配问题进行了计算。通过对计算结果进行对比分析，发现不同收缩曲线对超音速喷管内流有一定的影响，分析了流场特征，展示了马赫数在喷管内部的分布。
초음속분관유수축화확장량단조성，시고속풍동중획득초음속류동적중요부건。대우초음속분관수축단설계방법적연구교다，단상미견도분관수축단적궤충설계형면곡선여하여확장단합리필배문제적연구。침대이상적문제，이용CFD수치모의방법대궤충수축곡선여확장단필배문제진행료계산。통과대계산결과진행대비분석，발현불동수축곡선대초음속분관내류유일정적영향，분석료류장특정，전시료마혁수재분관내부적분포。
Supersonic nozzle is an important component of supersonic flow in the wind tunnel composed by contraction section and expansion section .There is much research on design of convergent section of su-personic nozzle ,but there is still less research on reasonable match of several convergent section curves and expansion section curves of supersonic nozzle .In this paper ,CFD numerical simulations of the differ-ent contraction curve supersonic nozzle were conducted , and the results were analyzed .The similarities and differences between different contraction curves of the supersonic nozzle flow were found .The differ-ences of the flow in the supersonic nozzle with different contraction curve were also found .The character-istics of the flow field and the distribution of Mach number in the nozzle internal is analyzed and shown .