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首页> 外文会议>AIAA/ASME/SAE/ASEE joint propulsion conference exhibit >C2b Rayon Source Requalification for Carbon Phenolic Nozzle Insulators
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C2b Rayon Source Requalification for Carbon Phenolic Nozzle Insulators

机译：碳酚醛喷嘴绝缘子的C2b人造丝源重新鉴定

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The Ariane 5 booster nozzle uses a carbon cloth phenolic material for the liners that thermally protect the metal housings and control the hot gas flow in the convergent and the exit cone sections. Beginning in 1996, Snecma Propulsion Solide developed, with the support of CNES (French Space Agency), and DGA (French Defense Agency), a process to carbonize high-tenacity rayon in order to replace the North American Rayon Company (NARC) precursor used in the past decade for most SRM programs but declared out of production. The new material, code name C2, underwent several full-scale static tests on Ariane 5 ARTA program and other national programs for Defense. The physical properties of C2 have been shown to be equivalent or better than the NARC based product. Two high-tenacity rayon fibers have been qualified for Ariane 5 MPS nozzles: Viscord Super 3 manufactured by Glanzstoff in Polten, Austria and Cordenka 700 manufactured by Accordis in Obemburg, Germany. The fiber is then twisted into yarn and woven into fabric by Porcher in Lyon, France. Subsequently the rolls of white woven rayon are washed, pre-treated, pyrolyzed, carbonized, inspected, and tested in a dedicated facility located on the SPS plant in Bordeaux, France. Capability to produce the C2 rayon based carbon cloth for ablative phenolic materials was fully demonstrated. Today, the production capacity is 35 tons per year. More than 60 Ariane 5 nozzles with C2 have flown successfully through fall 2010. Specific environmental restrictions on the Austrian plant of the rayon supplier Glanzstoff have resulted in a rayon source plant obsolescence declared by mid 2008. To ensure ongoing supply until a new source of fiber is qualified, SPS in agreement with its customers decided to stockpile significant quantities of rayon fiber prior to the shutdown of the Austrian production plant and activated a replacement program. The first phase (A) of this program, supported by ESA (European Space Agency) and DGA, was focused on testing two high tenacity rayon fibers: Viscord Super 2 manufactured by Glanzstoff in its Bohemia plant in Czech Republic as a 'follow-on' option and also re-check the capability of the Accordis Cordenka 700 as a back-up option. Glanzstoff super 2 was selected by 2009 as the nominal source and Cordenka 700 confirmed as a viable second source for the new carbon fabric, named C2b. Phase B and C of the replacement program devoted to full material qualification and reproducibility tests are now completed. Full qualification based on material characterization and manufacturing parts feasibility checking is now achieved. The first use of a C2b carbon cloth phenolic based on this new rayon source will occur on an Ariane 5 motor scale one firing test, planned in march 2012 in Kourou within the ESA ARTA program. This paper summarizes the re-qualification program of the new rayon source for the C2b ex-rayon carbon fabric and resulting carbon-phenolic material.
机译：Ariane 5增压喷嘴的衬套使用碳布酚醛材料，可热保护金属外壳并控制会聚和出口锥部中的热气流。从1996年开始，斯奈克玛推进固体公司在CNES（法国航天局）和DGA（法国国防部）的支持下开发了一种碳化高强度人造丝的工艺，以取代使用的北美人造丝公司（NARC）前体在过去的十年中，大多数SRM程序都已退出生产。代号为C2的新材料在Ariane 5 ARTA计划和其他国家国防计划中进行了几项全面的静态测试。已证明C2的物理性质与基于NARC的产品相当或更好。两种高强度人造丝纤维已通过Ariane 5 MPS喷嘴认证：奥地利Polten的Glanzstoff制造的Viscord Super 3和德国Obemburg的Accordis制造的Cordenka 700。然后由法国里昂的Porcher将纤维捻成纱线，然后编织成织物。随后，在法国波尔多SPS工厂的专用设施中对白色机织人造丝进行清洗，预处理，热解，碳化，检查和测试。充分证明了生产用于烧蚀酚醛材料的C2人造丝基碳布的能力。如今，年生产能力为35吨。截止到2010年秋季，已经成功使用了60多个带有C2的阿丽亚娜5喷嘴。人造丝供应商Glanzstoff在奥地利的工厂受到特殊的环境限制，导致人造丝源工厂在2008年中期宣布过时。如果合格，SPS与客户达成协议，决定在奥地利生产工厂关闭之前储存大量的人造丝纤维，并启动了一项替换计划。该计划的第一阶段（A）在ESA（欧洲航天局）和DGA的支持下，专注于测试两种高强度人造丝纤维：由Glanzstoff在其捷克共和国的Bohemia工厂制造的Viscord Super 2，作为“后续产品”。选项，并重新检查Accordis Cordenka 700作为备用选项的功能。 2009年，Glanzstoff super 2被选定为标称来源，Cordenka 700被确认为名为C2b的新型碳纤维织物的可行第二个来源。现已完成用于全面材料鉴定和再现性测试的替换程序的B和C阶段。现在已经实现了基于材料表征和制造零件可行性检查的全面认证。基于这种新的人造纤维来源的C2b碳布酚醛材料的首次使用将在Ariane 5电机规模一次燃烧试验中进行，该试验计划于2012年3月在ESA ARTA计划中于库鲁进行。本文总结了用于C2b人造丝碳纤维织物和所得碳酚材料的新型人造丝来源的重新认证程序。

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