Design and experimental studies on ceramic port cover for dual pulse motor

Chang-Hui Wang; Yu Liu; Ya-Bing Liu

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Design and experimental studies on ceramic port cover for dual pulse motor

机译：双脉冲电机陶瓷端口盖的设计与实验研究

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摘要

Material and definition of dome-shaped ceramic port cover contour is presented. Two types of ceramic port covers with equal thickness and variable thickness structures are proposed. A group of cold-flow tests was carried out on a reusable dual pulse motor in which the performances of different port covers including sealing, first-pulse pressure bearing and second-pulse broken pressure were experimentally studied. A solid dual pulse motor for hot-firing test was designed, manufactured and statically tested. The feasibility of proposed bulkhead with ceramic port cover employed on actual solid dual pulse motor was proved. It is found that dome-shaped port cover made from machinable glass ceramic withstands a high pressure on its convex side, but is prone to fragmentation while imposing a reasonably low pressure on its concave side. The peripherally thickened port cover that is more robust in machining and assembly process is recommended. Grooves milled on the port cover induce fragmentation and are helpful to produce regular broken aperture shape. The bulkhead assembly consists of retaining ring, port cover and supporting ring can well fulfill the requirements of port cover in fixing, preloading and sealing. The broken fragments are less likely to damage the insulation structures of the combustion chamber and the nozzle unit which had been validated in the test.

机译：介绍了圆顶形陶瓷端口盖轮廓的材料和定义。提出了两种具有相同厚度和可变厚度结构的陶瓷端口盖。在可重复使用的双脉冲电动机上进行了一组冷流测试，其中对包括密封，第一脉冲压力轴承和第二脉冲破裂压力在内的不同端口盖的性能进行了实验研究。设计，制造和静态测试了用于热点火测试的固态双脉冲电动机。证明了在实际的固态双脉冲电动机上采用陶瓷端口盖的隔板的可行性。已经发现，由可机加工的玻璃陶瓷制成的圆顶形端口盖在其凸侧承受高压，但是在其凹侧施加相当低的压力时易于碎裂。建议使用外围加厚的端口盖，以便在机械加工和组装过程中更坚固。在端口盖上铣削的凹槽会导致碎裂，并有助于产生规则的破碎孔径形状。隔板组件由挡圈，端口盖和支撑环组成，可以很好地满足端口盖在固定，预紧和密封方面的要求。破碎的碎片不太可能损坏燃烧室和喷嘴单元的绝缘结构，该结构已在测试中得到验证。

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来源
《Acta astronautica》 |2011年第12期|p.1881-1890|共10页
作者
Chang-Hui Wang; Yu Liu; Ya-Bing Liu;
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作者单位

403 Teaching and Research Section, Beijing University of Aeronautics and Astronautics, 100191 Beijing, People's Republic of China;

403 Teaching and Research Section, Beijing University of Aeronautics and Astronautics, 100191 Beijing, People's Republic of China;

403 Teaching and Research Section, Beijing University of Aeronautics and Astronautics, 100191 Beijing, People's Republic of China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
solid rocket motor; pulse motor; bulkhead; port cover; experiment;

机译：固体火箭发动机;脉冲发动机;舱壁;端口盖;实验;

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Design and experimental studies on ceramic port cover for dual pulse motor

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