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验证了基于CFD/CSD(计算流体动力学/计算结构动力学)串行双向耦合算法的准确性,并针对单边膨胀喷管上膨胀面末端移动板的可调方案,研究了不同移动板长度(150,180mm)与厚度(5,7mm)下的流固耦合响应.结果表明:流固耦合引起的振动会造成喷管气动参数的波动,移动板长度为180mm时,达到稳定后,与常规不计流固耦合的情况相比,喷管的升力下降1.38%,冷热态俯仰力矩差增加16.9%;移动板厚度相同时(5mm),较短移动板的气动性能较差,但动态性能较好:升力减小9.9%,而响应时间缩短44.7%;当移动板长度相同时(180mm),较厚的移动板同时拥有好的气动与动态特性:稳态时升力提高0.98%,冷热态俯仰力矩差减小10.5%,且响应时间减小40.4%.
The accuracy of the serial bidirectional coupling algorithm based on CFD / CSD (Computational Fluid Dynamics / Computational Structural Dynamics) was verified. According to the adjustable scheme of moving plate at the end of expansion surface of unilateral expansion nozzle, (150,180mm) and thickness (5,7mm). The results show that the vibration induced by the fluid-solid coupling will cause the fluctuation of the aerodynamic parameters of the nozzle. When the length of the moving plate is 180mm, Compared with the case of fluid-solid coupling, the lift of the nozzle is decreased by 1.38% and the difference of pitch moment in hot and cold conditions is increased by 16.9%. When the thickness of moving plate is the same (5mm), the shorter moving plate has lower aerodynamic performance but better dynamic performance : The lift is reduced by 9.9% and the response time is shortened by 44.7%. Thicker moving plates have both good aerodynamic and dynamic characteristics when the moving plates are the same length (180mm): 0.98% lift at steady state, 10.5% reduction in torque difference and 40.4% reduction in response time.