CAJ | 학술논문

文中建立了非对称方形尾喷管及传统轴对称尾喷管的物理数学模型,基于N-S方程和RNG k-ε湍流模型,对两种尾喷管三维内流场进行了数值分析,研究了非对称方形尾喷管内部流动参数的变化趋势及其推力特性.结果表明:在相同收敛段、喷管长度和扩张比的条件下,两种喷管内的流动参数变化趋势一致与轴对称喷管相比,非对称方形尾喷管推力略低,但能够保证喷管的推力性能水平.
문중건립료비대칭방형미분관급전통축대칭미분관적물리수학모형,기우N-S방정화RNG k-ε단류모형,대량충미분관삼유내류장진행료수치분석,연구료비대칭방형미분관내부류동삼수적변화추세급기추력특성.결과표명:재상동수렴단、분관장도화확장비적조건하,량충분관내적류동삼수변화추세일치여축대칭분관상비,비대칭방형미분관추력략저,단능구보증분관적추력성능수평.
physical and numerical models were establishedased on N-S control equations and RNG k-ε turbulence model, the interior flow fields of the nozzles were analyzed through numerical method, both the flow parameters change trend and thrust speciality of the asymmetry quadrate nozzle were researched. The results show that, with the same constringency segment, nozzle length and expansion ratio, the change trend of flow parameters is consistent both the nozzles, and the asymmetry quadrate nozzle has the lower thrust compared with the axial-symmetry nozzlebut the level of its thrust performance can be ensured.