颗粒冲刷条件下硅橡胶绝热材料烧蚀特性实验研究

推进技术 ›› 2017, Vol. 38 ›› Issue (1): 227-234.

颗粒冲刷条件下硅橡胶绝热材料烧蚀特性实验研究

刘洋¹,关轶文¹,吴育飞¹,李江¹,陈剑¹,王敏²

西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,内蒙动力机械研究所，内蒙古呼和浩特 010010

发布日期:2021-08-15
作者简介:刘洋，男，博士，副教授，研究领域为固体发动机热防护。
基金资助:
国家自然科学基金NSFC(51276150，51576165)；中央高校基本科研业务费(3102014ZD0032；3102015BJJL001)。

Experimental Investigation on Ablation Characteristic of Silicone Rubber Insulator under Particle Erosion Condition

Science and Technology on Combustion，Internal Flow and Thermal-Structure Laboratory， Northwestern Polytecnical Unitversity Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal-Structure Laboratory， Northwestern Polytecnical Unitversity Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal-Structure Laboratory， Northwestern Polytecnical Unitversity Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal-Structure Laboratory， Northwestern Polytecnical Unitversity Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermal-Structure Laboratory， Northwestern Polytecnical Unitversity Xi’an 710072，China and Inner Mongolia Power Machineries Institute，Inner Mongolia，Hohhot 010010，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究颗粒冲刷条件下硅橡胶绝热材料的烧蚀规律和特性，采用一种颗粒冲刷状态可调的实验发动机，以添加有短切碳纤维和高硅氧玻璃纤维的硅橡胶为研究对象，开展了颗粒聚集浓度范围为34.5～75.3kg/m3，冲刷速度为9.4～35.9m/s，角度为19.3°～55.5°条件下的13次热试车实验，获得了颗粒冲刷状态参数和炭化烧蚀率之间的宏观影响规律，通过对试验后试件的宏观形貌和微观结构特征进行分析，初步探讨了硅橡胶绝热材料的烧蚀机理。研究结果表明:(1)和EPDM绝热材料的烧蚀规律和特性不同，实验条件下硅橡胶炭化层更厚且致密，硅橡胶材料的最大烧蚀率随颗粒聚集浓度变化较为敏感，当超过50kg/m3临界浓度值时，烧蚀率随浓度的增加而急剧增大。最大烧蚀率随颗粒冲刷速度增加而增大，并呈现出先急剧增加后缓慢增加的趋势；(2)在颗粒冲刷速度较低条件下，硅橡胶材料烧蚀率要高于EPDM的，在颗粒冲刷速度较高条件下，硅橡胶耐冲刷性能要略优于EPDM的；(3)硅橡胶的热分解温度区间约为623～989K，在烧蚀过程中，高硅氧纤维和硅橡胶分解产生的SiO₂会渗透到炭化层骨架中，进一步和C反应形成SiC，从而使炭化层致密化，具备耐冲刷特性；(4)通过分析烧蚀形貌和微观特征，初步提出了三层一面(基体层，热解层，炭化层，冲刷面)的烧蚀物理模型。

关键词: 固体火箭发动机；硅橡胶；绝热层；烧蚀特性；烧实验

Abstract: Focused on the ablation characteristics of silicone rubber enhanced by chopped carbon and high silica glass fiber under high temperature and concentration particle erosion condition，thirteen hot firing ablation experiments which range of particle concentration，erosion velocity and angles are 34.5～75.3kg/m3，9.4～35.9m/s，19.3°～55.5°，respectively，have been performed on test motor. The ablation rates of silicone rubber insulator have been obtained under different particle erosion condition. Based on the results of ablation rate and character of the insulator，the ablation mechanism of silicone rubber insulator under particle erosion condition has been discussed. The results show that: (1) compared with the EPDM ablation results，the char layer of the silicone rubber insulator is more dense and thick than EPDM’s，and the maximum ablation rates of the silicone rubber insulator are sensitive with the change of the particle concentration. When particle concentration is beyond 50kg/m3 of the particle concentration，the ablation rate increases sharply. And with increasing of particle erosion velocity，the ablation rate of silicon rubber insulator increases acutely at first and then increases slowly. (2) Under low particle erosion velocity condition，the ablation rates of EPDM were lower than silicon rubber’s，but under high particle erosion velocity condition，the ablation rates of EPDM were higher than silicon rubber’s. (3)The pyrolysis interval of silicone rubber is about 623～989K. During the ablation process，SiO₂ produced by pyrolysis of high silica glass fiber and silicon rubber will permeate into the porous of char layer，and will react with the C in char layer to form the SiC. Then the char layer is densified and can endure particle erosion. (4)Through the morphology observation and analysis，the ablation physics model of silicon rubber insulator with three-layer and one-surface ablation structure (original layer，pyrolysis layer，char layer，particle erosion surface) is put forward.

Key words: Solid rocket motor；Silicone rubber；Insulator；Ablation characteristic；Experiment

刘洋,关轶文,吴育飞,李江,陈剑,王敏. 颗粒冲刷条件下硅橡胶绝热材料烧蚀特性实验研究[J]. 推进技术, 2017, 38(1): 227-234.

LIU Yang¹,GUAN Yi-wen¹,WU Yu-fei¹,LI Jiang¹,CHEN Jian¹,WANG Min². Experimental Investigation on Ablation Characteristic of Silicone Rubber Insulator under Particle Erosion Condition[J]. Journal of Propulsion Technology, 2017, 38(1): 227-234.

参考文献

[1] Crump J, Amy A T. Flight Amplified Erosion of Head End Internal Insulation[R]. AIAA 91-1851.
[2] Derbidge T C, Powars C. Acceleration Effects on Internal Insulation Erosion[R]. AIAA 93-1858.
[3] 姜本正. 硅基绝热材料配方及POSS的应用探索研究[D]. 长沙:国防科学技术大学, 2011.
[4] Hamdani S, Longuet C, Sonnier R, et al. Calcium and Aluminum-Based Fillers as Flame-Retardant Additives in Silicone Matrices Ⅲ.Investigations on Fire Reaction [J]. Polymer Degradation and Stability, 2013, 98: 2021-2032.
[5] Adams M C. Recent Advance in Ablation[J]. ARS Journal, 1959, 29(9): 625-632.
[6] Hidalgo H, Kadanoff L P. Comparison Between Theory and Fight Ablation Data[J]. AIAA Journal, 1963, (1): 41-45.
[7] 孙冰, 林小树, 刘小勇, 等. 硅基材料烧蚀模型研究[J], 宇航学报, 2003, 24(3): 282-286.
[8] 余晓京. 富氧环境下绝热层烧蚀模型研究[D]. 西安:西北工业大学, 2004.
[9] 张长贵, 鲁国林, 张劲松, 等. 硅橡胶热防护材料的烧蚀性能[J]. 有机硅材料. 2005, 19(1): 1-4.
[10] 栾贻浩, 詹茂盛. 玻璃纤维与填料对硅橡胶耐烧蚀性能的影响及机理分析[J]. 化工新型材料, 2011, 39(4): 82-84.
[11] Mansouri J, Burford R P, Cheng Y B, et al. Pyrolysis Behavior of Silicone-Based Ceramifying Composites[J].Materials Science and Engineering A, 2006, 425: 7-14.
[12] 杨栋. 硅橡胶基绝热材料及其热化学烧蚀机理研究[D]. 长沙:国防科学技术大学, 2013.
[13] 张胜敏, 胡春波, 夏胜勇, 等. 高浓度颗粒流冲刷条件下硅橡胶和EPDM绝热材料动态烧蚀实验[J]. 推进技术, 2011, 32(2): 240-244. (ZHANG Sheng-min, HU Chun-bo, XIA Sheng-yong, et al. Real-Time Ablation Measurements on Erosion of Silicone Rubber and EPDM Material by Highly Concentrated Particles[J]. Journal of Propulsion Technology, 2011, 32(2): 240-244.)
[14] 李江, 何国强, 陈剑, 等. 高过载条件下绝热层烧蚀实验方法研究(II)收缩管聚集法[J]. 推进技术, 2004, 25(3): 196-198. (LI Jiang, HE Guo-qiang, CHEN Jian, et al. Study of Experimental Method for Ablation of Insulator of SRM with High Acceleration (Ⅱ) Convergent Tube Experimental Method[J]. Journal of Propulsion Technology, 2004, 25(3):196-198.)
[15] 李江, 何国强, 秦飞, 等. 高过载条件下绝热层烧蚀实验方法研究(I)方案论证及数值模拟[J]. 推进技术, 2003, 24(4): 315～318. (LI Jiang, HE Guo-qiang, QIN Fei, et al. Study of Experimental Method for Ablation of Insulator of SRM with High Acceleration (I)[J]. Journal of Propulsion Technology, 2003, 24(4): 315-318.)
[16] 刘洋, 李江, 何国强, 等. 过载条件下不同配方体系绝热材料筛选及烧蚀特性[J]. 推进技术, 2011, 32(4): 569-575. (LIU Yang, LI Jiang, HE Guo-qiang, et al. Insulator Material Screen Experiments and Ablation Characteristic under High Acceleration Condition[J]. Journal of Propulsion Technology, 2011, 32(4): 569-575.)
[17] 刘洋, 李江, 杨飒, 等. 过载条件下EPDM绝热材料烧蚀机理和模型研究(Ⅰ) 烧蚀机理分析[J]. 推进技术, 2011, 34(2): 229-233. (LIU Yang, LI Jiang, YANG Sa, et al. Investigation on Ablation Mechanism and Model of EPDM Insulator under High Acceleration Condition (I) Analysis of Ablation Mechanism[J]. Journal of Propulsion Technology, 2011, 34(2): 229-233.)
[18] 刘洋, 吴育飞, 李江, 等. 长时间小过载条件下发动机流场特征及绝热层烧蚀分析[J]. 推进技术, 2013, 34(8): 1071-1076. (LIU Yang, WU Yu-fei, LI Jiang, et al. Flow Field and Ablation Mode Analysis of Insulator under Low Acceleration with Long Operation Time Conditions for Solid Rocket Motor[J]. Journal of Propulsion Technology, 2013, 34(8): 1071-1076.)
[19] 刘洋, 李江, 何国强, 等. 颗粒冲刷条件下三元乙丙绝热材料烧蚀特性实验[J]. 推进技术, 2010, 31(5): 612-617. (LIU Yang, LI Jiang, HE Guo-qiang, et al. Experimental Investigation on Ablation Characteristic of EPDM Insulator under Particles Erosion Condition [J]. Journal of Propulsion Technology, 2010, 31(5): 612-617.)
[20] 杜春毅, 王正洲. 硅橡胶膨胀型阻燃和热分解特性分析[J]. 高分子材料科学与工程, 2008, 24(5): 88-91.
[21] 裴净秋, 刘洋, 吴育飞, 等. 某型硅橡胶绝热材料热分解特性研究[C]. 银川:中国航天第三专业信息网第36届技术交流会议, 2015.
[22] Stockes E H. Kinetic of Pyrolysis Mass Loss from Cured Phenolic Resin[R]. AIAA 94-3182.
[23] 胡海峰. 陶瓷先驱体的分子设计与合成及其在CMCs制备中的应用[D]. 长沙: 国防科学技术大学, 1998.　　　　　　　　　　　　　*　收稿日期:2015-09-17；修订日期:2015-12-07基金项目:国家自然科学基金NSFC(51276150,51576165)；中央高校基本科研业务费(3102014ZD0032；3102015BJJL001)。作者简介:刘洋,男,博士,副教授,研究领域为固体发动机热防护。E-mail: liuyang802@nwpu.edu.cn(编辑:史亚红)