Study on conjugate heat transfer characteristics of flexible structure of solid motor nozzle based on multiple working conditions

Abstract In order to study the influence of deformations nozzle’s flexible sections on its inner wall’s heat transfer, this research uses two-dimensional axisymmetric model and k − ω SST turbulence numerically analyze tail flow field flexible-extendible nozzle under multiple working conditions. The transfer with without are simulated analyzed. simulation results show that when deformed, new shock waves will be generated in nozzle; temperature flux first half each section decrease, while those at end increase, deformations’ effect diminishes over time. shows make uneven, ablation may aggravated, front alleviated.