非轴对称斜切喷管内流场数值模拟

应用有限体积法建立了三维守恒型N-S方程组的数值求解器,对某非轴对称斜切喷管内流场开展了数值模拟计算,研究了斜切角度变化时引起的发动机推力及推力线偏转角变化。研究结果表明,在相同总压、总温条件下,喷管质量流量及发动机推力随斜切角增大而呈线性趋势减小,推力线偏转角在斜切角为0°时最大。

Numerical simulation on inner flow field of nonaxisymmetrical scarfed nozzle

Numerical solver of 3D N-S conservation equations was derived by means of finite volume method.The inner flow field of some nonaxisymmetry scarfed nozzle was numerically simulated and calculated.The change of motor thrust,deflection angle of thrust line with scarfed angle was investigated.The results show that mass flow of nozzle and motor thrust under the same total pressure and total temperature condition decrease linearly with the increase of scarfed angle.Deflection angle of thrust line reaches the maximum when scarfed angle is equal to the zero degree.