论文部分内容阅读
基于CFD数值计算软件,针对喉部宽高比为2.083的球型收敛调节片喷管,进行了矢量与非矢量状态下的内性能数值研究。考察了在不同俯仰和偏航矢量状态下,喷管推力系数、流量系数的变化及落压比对气动矢量角的影响。结果表明:俯仰和偏航两种矢量状态对喷管的推力系数、流量系数产生的影响都在3%以内。喷管的俯仰是通过同时转动上下扩张板来实现的,其与偏航作动相比表现出对性能更大的影响;另外发现在设计压比之前,气动俯仰角出现了随落压比先增大后减小的趋势,而设计压比之后渐渐趋于不变,基本和几何俯仰角相等,但落压比对气动偏航角却没有表现出太大的影响。
Based on the CFD numerical calculation software, the numerical research on the internal performance under the condition of vector and non-vector was carried out for the spherical convergent regulator nozzle whose throat aspect ratio was 2.083. The effects of nozzle thrust coefficient, flow coefficient and pressure drop ratio on the aerodynamic vector angles were investigated under different pitch and yaw vector states. The results show that the influence of the two vector states of pitch and yaw on the thrust coefficient and flow coefficient of the nozzle are both within 3%. The pitch of the nozzle is achieved by rotating the upper and lower expansion plates at the same time, which shows a greater effect on the performance than the yaw operation. In addition, it is found that before designing the pressure ratio, After the design pressure ratio gradually tends to be the same, the basic and geometric pitch angle is equal, but the pressure ratio has no significant effect on the aerodynamic yaw angle.