论文部分内容阅读
C/C扩张段与喷管基础段的连接结构是影响C/C扩张段热应力的关键因素,为了获得最优连接形式,采用相同的边界条件、材料参数和结构尺寸,对螺纹、倒锥、销钉和套锥共4种典型连接结构的C/C扩张段进行了热应力数值模拟。通过温度场和应力场对比分析,并考虑工程应用性,认为销钉连接结构最优。采用φ340 mm试验发动机,对销钉连接结构C/C扩张段开展了热试车考核。试车后,C/C扩张段结构完整,验证了该连接结构的设计合理性。热试车过程中,成功测试了C/C扩张段外壁面的实时温升曲线,各测点的温升规律以及沿轴向的温度趋势与理论分析基本一致,发动机工作结束时最高温度达1 127℃。
The connection between C / C expansion section and nozzle base section is the key factor that affects the thermal stress of C / C expansion section. In order to obtain the optimal connection mode, the same boundary conditions, material parameters and structural dimensions are used to analyze the thread, , Pin and sleeve cone a total of four typical connection structure of C / C expansion of the thermal stress numerical simulation. Through the comparative analysis of temperature field and stress field, considering the engineering applicability, it is considered that the pin connection structure is the best. Using φ340 mm test engine, the pin connection structure C / C expansion section to carry out a hot test assessment. After commissioning, the structure of C / C expansion section is complete, which verifies the design rationality of the connection structure. In the process of hot test, the real-time temperature rise curve of the outer wall of C / C expansion section was successfully tested. The temperature rise law and the temperature trend along the axial direction were basically consistent with the theoretical analysis. The maximum temperature reached 1 127 at the end of the engine work ℃.