Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Study of numerical analysis upon thermal structure of nozzle for solid rocket motor
| DOI: | 10.11809/bqzbgcxb2024.05.021 |
| Keywords: | Solid Rocket Motor (SRM); submerged nozzle; finite element method; thermal structure; thermal stress |
| Abstract: | The coupling thermal and mechanical effect on submerged nozzles is important in the design of modern rockets upon thermal loading and aerodynamic pressure. A simulation of the subroutine of non uniform pressure and non uniform heat transfer coefficient was conducted by CFD and FEM software to study the thermo structural response of a submerged nozzle. Both the aerodynamic parameters and heat coefficients were obtained through analyzing the flow field. It was found that the thermal loading had an important influence on stress of throat insert for the solid rocket motor (SRM), both the hoop compressive stress and the hoop tensile stress increase at first and then decrease with the increase of time for the throat insert. The experimental results of the ground hot firing test of SRM with submerged nozzle showed that: the present method is reasonable for nozzle structural integrity and safety analysis, which can be applied to study the thermo structural response of submerged nozzle for SRM. |
| Published: | 2024-05-31 |