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Cryo-Trackerreg; Mass Gauging System Testing in a Large Scale Expendable Launch Vehicle LOX Tank Simulator

机译：在大型消耗型运载火箭LOX储罐模拟器中进行Cryo-Tracker®质量计量系统测试

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Sierra Lobo tested its patented Cryo-Tracker® probe and Mass Gauging System in a large scale Expendable Launch Vehicle (ELV) liquid oxygen tank simulation for NASA. Typical Liquid Oxygen (LOX) tank operations were simulated at Lockheed Martin's Engineering Propulsion Laboratory in Denver, Colorado. The Cryo-Tracker® probe is 33 feet long, the longest built to date. It was mounted in the tank at only two locations, separated by 26 feet. Each test simulated typical Lockheed Martin booster pre-launch tanking operations, including filling the tank with LOX at fill rates typically used at the launch pad, and maintaining the fill level for a period representative of a typical pad hold. The Cryo-Tracker® Mass Gauging System was the primary instrument used for monitoring the fill and controlling the topping operations. Each test also simulated a typical flight profile, expelling the LOX at representative pressures and expulsion flow rates. During expulsion, the Cryo-Tracker® System served to generate an Engine Cut-Off (ECO) signal. Test objectives were as follows: Cryo-Tracker® data will be validated by flight-like propellant instruments currently used in launch vehicles; the probe will survive the harsh environment (which will be documented by a digital video camera) with no loss of signal or structural integrity; the system will successfully measure liquid levels and temperatures under all conditions and calculate propellant mass in real-time; the system will successfully demonstrate its feasibility as a control sensor for LOX filling and topping operations, as well as for engine cut-off. All objectives were met and the test results are presented.
机译：Sierra Lobo在NASA的大型可扩展运载火箭（ELV）液氧罐模拟中测试了其专利的Cryo-Tracker®探头和质量计系统。在科罗拉多州丹佛市的洛克希德·马丁公司的工程推进实验室模拟了典型的液氧（LOX）储罐操作。 Cryo-Tracker®探针长33英尺，是迄今为止建造时间最长的探针。它仅安装在坦克中的两个位置，相距26英尺。每个测试都模拟了典型的洛克希德·马丁助推器发射前的加油操作，包括以通常在发射台上使用的填充率向LOX装满油箱，并在代表典型垫保持的一段时间内保持填充水平。 Cryo-Tracker®质量计量系统是用于监控灌装和控制浇头操作的主要仪器。每个测试还模拟了一个典型的飞行曲线，以代表性的压力和排出流速驱逐了LOX。在驱逐期间，Cryo-Tracker®系统用于生成发动机截止（ECO）信号。测试目标如下：Cryo-Tracker®数据将通过目前运载火箭上使用的类似飞行的推进剂仪器进行验证；探头将在恶劣的环境（将由数码摄像机记录下来）中幸存下来，而不会损失信号或结构完整性；该系统将成功测量所有条件下的液位和温度，并实时计算推进剂质量；该系统将成功证明其作为LOX加注和注油操作以及发动机停机控制传感器的可行性。达到了所有目标，并给出了测试结果。

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