弹道学报2023，Vol.35Issue(4)：11-19,9.DOI:10.12115/j.issn.1004-499X(2023)04-002
基于热解动力学的喷管耦合传热数值研究
Numerical Study on Conjugate Heat Transfer of Complex Nozzle Based on Pyrolysis Kinetics
郑健 1杨玉龙 2薛海峰1
作者信息
- 1. 南京理工大学 机械工程学院,江苏 南京 210094
- 2. 南京晨光集团有限责任公司,江苏 南京 210006
- 折叠
摘要
Abstract
A conjugate heat transfer(CHT)code was developed based on the finite volume method to study the heat transfer of complex nozzle under different expansion states and ablation characteristics of carbon/phenolic material anti-ablation layer.The code solved the two-dimensional axisymmetric Navier-Stokes equation for the fluid domain and heat conduction equation for solid domain.The k-ω SST model was selected for turbulence closure.The CHT process was achieved by keeping the heat flux of each side consistent and continuous of temperature on the coupling-wall.And the variable thermal properties of carbon/phenolic material with time and temperature was obtained with pyrolysis kinetics model.After the CHT code was validated by aerodynamic heating test of blunt carbon/phenolic specimens,the simulation under different expansion states of complex nozzle with a carbon/phenolic material anti-ablation layer,C/C composite throat insert was carried out,the results indicated that the thickness of charing layer was consistent with temperature distribution in axial in the early stage of motor operation.Due to the heat transfer of the throat insert to the carbon/phenolic anti-ablation layer,the interface between the divergent section and the throat insert became the largest thickness of the charing layer in the divergent section.The thickness of charing layer increased suddenly,and then gradually decreased in the axial direction until it is zero when flow separation occurs in the nozzle.关键词
复合结构喷管/耦合传热/碳/酚醛/变热物性/体积烧蚀Key words
complex nozzle/conjugate heat transfer/carbon-phenolic/variable thermal properties/volumetric ablatio分类
军事科技引用本文复制引用
郑健,杨玉龙,薛海峰..基于热解动力学的喷管耦合传热数值研究[J].弹道学报,2023,35(4):11-19,9.
