Experimental Study of Anti-Acceleration Erosion Capability for Typical Throat Materials

doi:10.13675/j.cnki.tjjs.190633

Journal of Propulsion Technology ›› 2020, Vol. 41 ›› Issue (10): 2367-2373.DOI: 10.13675/j.cnki.tjjs.190633

• Material,Propellant and Fuel • Previous Articles Next Articles

Experimental Study of Anti-Acceleration Erosion Capability for Typical Throat Materials

1.Science and Technology on Combustion，Internal Flow and Thermo-Structure Laboratory， Northwestern Polytechnical University，Xi’an 710072， China;2.Xi’an Institute of Aerospace Propulsion，Xi’an 710025，China;3.Research Institute of Aerospace Propulsion，Xi’an 710025，China

Published:2021-08-15

典型喉衬材料抗过载烧蚀性能的实验研究

王立武^1,2，田维平^1,3，郭运强²，林志远¹

1.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;2.西安航天动力技术研究所，陕西西安 710025;3.航天动力技术研究院，陕西西安 710025

Abstract

Abstract: In order to understand the anti-acceleration erosion（ablation） capability of typical nozzle throat materials in solid rocket motor（SRM）， a simulation system of rotating overload test was designed and implemented. Various kinds of experiments were conducted to investigate the anti-acceleration ablation capability of three kinds of throat materials under 20g and 30g lateral acceleration. Results show that the erosion thickness of nozzle throat in the acceleration direction is significantly higher than that in the non-acceleration direction， which is defined as throat deviant erosion. Compared with non-acceleration region， a sharp rise in the nozzle throat’s ablation rate is observed in the acceleration region as the lateral acceleration increases. In the case studied in this paper， the nozzle throat’s erosion rate of high strength graphite in the acceleration direction is 12.43 and 20.53 times greater than those in the non-acceleration direction when the lateral acceleration reaches 20g and 30g， respectively. Under high lateral acceleration， in-plane C/C composite has a better anti-acceleration ablation capability， following C/C composite using a needled perform and high strength graphite， respectively. Furthermore， the erosion capability of throat materials may has a fundamental change under acceleration and non-acceleration conditions， which should be taken into account during the design of nozzle under high lateral acceleration condition.

Key words: Solid rocket motor;Erosion;Acceleration;Nozzle;Throat material

摘要： 为了掌握固体火箭发动机典型喷管喉衬材料的抗过载烧蚀性能，通过地面旋转模拟过载实验系统，开展了20g和30g高横向过载下的三种喉衬材料抗过载烧蚀性能研究。结果表明，在高横向过载下喷管喉衬会出现偏烧蚀现象，即过载区域喉部烧蚀厚度远大于非过载区域；与非过载区域相比，过载区域喉部烧蚀率显著增大，且过载区域喉部烧蚀率随着横向过载的增加而显著增大，20g横向过载下，高强石墨材料的喉部烧蚀率增大到12.43倍，30g横向过载下，高强石墨材料的喉部烧蚀率增大到20.53倍；在高横向过载下，轴编C/C抗过载烧蚀性能最好，无纬布针刺C/C次之，高强石墨最弱。在高过载和非过载下，喉衬材料的烧蚀性能优劣将发生根本变化，在过载下固体发动机喷管设计过程中应该予以重视。

关键词: 固体火箭发动机;烧蚀;过载;喷管;喉衬材料

WANG Li-wu^1,2, TIAN Wei-ping^1,3, GUO Yun-qiang², LIN Zhi-yuan¹. Experimental Study of Anti-Acceleration Erosion Capability for Typical Throat Materials[J]. Journal of Propulsion Technology, 2020, 41(10): 2367-2373.

王立武，田维平，郭运强，林志远. 典型喉衬材料抗过载烧蚀性能的实验研究[J]. 推进技术, 2020, 41(10): 2367-2373.

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Experimental Study of Anti-Acceleration Erosion Capability for Typical Throat Materials

典型喉衬材料抗过载烧蚀性能的实验研究

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