• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>4th International spacecraft propulsion conference >TESTING OF THE QINETIQ T6 THRUSTER IN SUPPORT OF THE ESA BEPICOLOMBO MERCURY MISSION
【24h】

TESTING OF THE QINETIQ T6 THRUSTER IN SUPPORT OF THE ESA BEPICOLOMBO MERCURY MISSION

机译：QINETIQ T6推进器在ESA BEPICOLOMBO汞排放任务中的测试

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents the results of two test programmes. The first involved a series of simultaneous thruster firing tests performed at QinetiQ in the QinetiQ LEEP 2 (2nd Large European Electric Propulsion) vacuum test facility using 2 T6 thrusters operating between 50 and 230 mN at a specific impulse above 4500s. The test configuration allowed the simultaneous operation of 2 thrusters at a range of thrust levels and thruster spacings. The spacing between thrusters could be varied between 800 mm and 10 mm with the thrusters operating. One of the thrusters, designated the Primary, was suspended from a pendulum thrust balance and was aligned with a large diameter ion beam probe array. These diagnostics allowed the thrust to be directly measured and the ion beam plume to be characterised, allowing comparisons to be made between single and simultaneous operation at different thruster spacings. Testing was also performed with different combinations of neutralisers to determine the potential effects of dual thruster operation with a single neutraliser. rnThe second series of tests involved the operation of a single T6 thruster at a thrust level of 208 mN at the elevated thermal conditions predicted for Mercury. Thermal and mechanical analyses of the T6 (including additional thrusters in close proximity) indicated the worst case thermal conditions occur when the thruster assembly was illuminated from the side, producing the most severe temperatures and thermal gradients across the thruster structure. A 500 hour test was performed in which thruster performance was assessed using electrical operating parameters, thrust balance and beam probe array measurements taken with the thruster operating at both nominal and simulated Mercury thermal conditions. The latter was produced using a metal collar equipped with electrical heaters, placed in close proximity to the thruster structure. The heater collar could be positioned and withdrawn without the need to vent the chamber and therefore the thermal environment could be varied with the thruster operating.
机译：本文介绍了两个测试程序的结果。首先涉及在QinetiQ LEEP 2（第二大型欧洲电力推进）真空测试设施中在QinetiQ进行的一系列同时推进器点火测试，使用2台T6推进器在50到230 mN的压力下以高于4500s的特定脉冲运行。测试配置允许2个推进器在一定的推力水平和推进器间距范围内同时运行。推进器运行时，推进器之间的间距可在800 mm至10 mm之间变化。其中一个推力器（称为主推力器）从摆式推力天平上悬挂下来，并与大直径离子束探针阵列对齐。这些诊断程序可以直接测量推力，并可以表征离子束羽流，从而可以在不同推进器间距的单次操作和同时操作之间进行比较。还使用不同的中和剂组合进行了测试，以确定使用单个中和剂的双推进器操作的潜在影响。在第二系列测试中，在汞预测的高温条件下，单个T6推进器的推力为208 mN。 T6的热和机械分析（包括紧邻的其他推进器）表明，当从侧面照亮推进器组件时，会发生最坏的情况，即在推进器结构上产生最严重的温度和热梯度。进行了500小时的测试，其中使用电运行参数，推力平衡和推力器在标称和模拟水银热条件下运行时进行的推力平衡和束探头阵列测量来评估推力器性能。后者是使用配备有电加热器的金属轴环生产的，该金属轴环紧邻推进器结构放置。加热器轴环可以在不需要排空腔室的情况下进行定位和抽出，因此热环境可以随着推进器的运行而变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号