Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Analysis of influence law of permeable nozzle parameters based on orthogonal experimental design
| DOI: | 10.11809/bqzbgcxb2024.09.014 |
| Keywords: | rocket motor; permeable nozzle; orthogonal method; average specific impulse; numerical simulation |
| Abstract: | The influence of critical design parameters on the operational performance of permeable nozzle is examined through the application of orthogonal experimental design methodology. By analyzing the orthogonal results through range and extreme difference analysis, this investigation identifies the influence magnitude ranking and significance levels of five factors—nozzle expansion ratio, base expansion ratio, perforation angle, porosity, and pore diameter—on nozzle performance.The results show that low altitude operating environment conditions enhance the dependence and sensitivity of nozzle thrust performance on the model parameters. At the selected parameter levels, the base expansion ratio is the most significant factor affecting the average specific impulse integral, followed by the nozzle expansion ratio. Little influence on nozzle performance is exerted by the opening angle, porosity, and pore size. There is a monotonic functional relationship between nozzle expansion ratio, base expansion ratio, and opening angle on nozzle performance. However, no monotonic functional relationship is existed between porosity, pore size, and nozzle performance. |
| Published: | 2024-09-30 |