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Priming Event Peak Pressures in Liquid Propulsion Systems

机译：液体推进系统中的启动事件峰值压力

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摘要

An experimental study was conducted to evaluate pressure transient levels in unrestricted and restricted liquid monopropellant propulsion system configurations and propellant manifolds generated by water hammer effects resulting from a priming event. This was accomplished through the development of a priming event experimental setup using distilled water as a propellant simulant for hydrazine. Multiple test elements were evaluated using different internal diameters, line lengths, manifold layouts, and flow control valves at atmospheric, subatmospheric, and low-pressure pretest pressure levels. The goals of the research were to determine the influence of restrictions in a liquid propulsion system, as well as the propellant manifold design, in the mitigation of the priming event maximum pressure levels. Based upon experimental results, it was determined that the internal diameter, line length, valve flow coefficient, and pretest pressure level all contributed to the pressure magnitude of the priming event. It was also observed that peak water hammer pressure levels might be significantly minimized and equally distributed throughout a propulsion system manifold using an inline cavitating venturi and manifold layout promoting free flow of the fluid, which was independent of the line geometry, the valve flow coefficient, and the valve opening response time.
机译：进行了一项实验研究，以评估无限制和受限制的液体单推进剂推进系统构型以及由启动事件引起的水锤效应产生的推进剂歧管中的压力瞬变水平。这是通过使用蒸馏水作为肼的推进剂模拟剂的引发事件实验装置的开发来实现的。在大气压，低于大气压和低压预测试压力水平下，使用不同的内径，线长，歧管布局和流量控制阀评估了多个测试元件。该研究的目的是确定液体推进系统中的限制因素以及推进剂歧管设计在减轻启动事件最大压力水平方面的影响。根据实验结果，确定内径，线长，阀流量系数和预测试压力水平均对灌注事件的压力幅度有影响。还观察到，使用在线空化文丘里管和歧管布局促进流体自由流动，峰值水锤压力水平可能会大大降低并在整个推进系统歧管内平均分布，这与流体的自由流动无关，而与管线的几何形状，阀门流量系数，和阀门打开响应时间。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2019年第3期|899-909|共11页
  • 作者

    Moore Jeffrey D.; Ilber Joshua G.; Brindle Bryce; Risha Grant A.;

  • 作者单位

    Penn State Univ, Mech Engn, Div Business Engn & Informat Sci & Technol, Altoona Coll, Altoona, PA 16601 USA;

    Penn State Univ, Altoona Coll, Div Business Engn & Informat Sci & Technol, Altoona, PA 16601 USA;

    Penn State Univ, Altoona Coll, Div Business Engn & Informat Sci & Technol, Altoona, PA 16601 USA;

    Penn State Univ, Mech Engn, Div Business Engn & Informat Sci & Technol, Altoona Coll, Altoona, PA 16601 USA;

  • 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
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