低温推进剂加注系统置换介质的相似性分析

推进技术 ›› 2018, Vol. 39 ›› Issue (3): 703-708.

低温推进剂加注系统置换介质的相似性分析

李亦健^1,2,高旭²,陈虹²,雷刚²,金滔^1,2

浙江大学制冷与低温研究所浙江省制冷与低温技术重点实验室，浙江杭州 310027; 航天低温推进剂技术国家重点实验室，北京 100028,航天低温推进剂技术国家重点实验室，北京 100028,航天低温推进剂技术国家重点实验室，北京 100028,航天低温推进剂技术国家重点实验室，北京 100028,浙江大学制冷与低温研究所浙江省制冷与低温技术重点实验室，浙江杭州 310027; 航天低温推进剂技术国家重点实验室，北京 100028

发布日期:2021-08-15
作者简介:李亦健，女，博士生，研究领域为低温传热与流动。E-mail: zjulyj@zju.edu.cn 通讯作者:金滔，男，博士，教授，研究领域为低温制冷与低温传热。
基金资助:
浙江省自然科学基金重点项目(LZ14E060001)；航天低温推进剂技术国家重点实验室开放课题(SKLTSCP1408)。

Similarity Analysis of Different Replacement Gases for Cryogenic Propellant Loading System

Institute of Refrigeration and Cryogenics / Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province，Zhejiang University，Hangzhou 310027，China;State Key Laboratory of Technologies in Space Cryogenic Propellants，Beijing 100028，China,State Key Laboratory of Technologies in Space Cryogenic Propellants，Beijing 100028，China,State Key Laboratory of Technologies in Space Cryogenic Propellants，Beijing 100028，China,State Key Laboratory of Technologies in Space Cryogenic Propellants，Beijing 100028，China and Institute of Refrigeration and Cryogenics / Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province，Zhejiang University，Hangzhou 310027，China;State Key Laboratory of Technologies in Space Cryogenic Propellants，Beijing 100028，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究新一代航天推进系统低温推进剂加注系统的气体置换流程特性，采用数值模拟的方法，对置换介质的流动过程进行了模拟和分析，重点考察低温液体增压罐的工作压力、气路调节阀开度对于系统中流动状态和流量及压力调节的影响，并分别以氢、氮作为介质对系统内的流动特性进行计算，分析置换过程中流量调节的氮氢相似性。结果显示，氮气置换系统所得的流量压力调节规律与氢气置换系统在影响因素和变化趋势方面是相似的；但是，在相同的液体储罐增压工作压力和调节阀开度下，氢气系统内的最大流速可达氮气系统内最大流速的5倍，考虑到氢气系统的安全性要求，精确的流量调节策略还需要根据实际氢的置换测试结果来进行确定。

关键词: 低温推进剂；加注系统；气体置换；相似性分析

Abstract: To study the flow characteristics of gas replacement process in the cryogenic propellant loading system for novel spacecraft propulsion systems， numerical modeling method was adopted to simulate the flowing process of replacement gas. The effects of the operating pressure of self-pressurized liquid tank and the opening of gas control valve on the flow status， flowing rate and pressure adjustment were analyzed. The flow characteristics of the system with replacement medium GH2 and GN2 were then calculated to analyze the similarity between them of gas replacement process. The results show that the influencing factors and trends for the pressure control of nitrogen system are similar to those for hydrogen system. However， the maximum velocity in the hydrogen system can be 5 times higher than that in the nitrogen system under the operating conditions with the same pressure of liquid tank and the same opening of control valve. Thus， for safe operation of the hydrogen system， the accurate adjustment strategy of hydrogen system should be supported by further measurement work on the gas replacement with hydrogen.

Key words: Cryogenic propellant；Loading system；Gas replacement；Similarity analysis

李亦健,高旭,陈虹,雷刚,金滔. 低温推进剂加注系统置换介质的相似性分析[J]. 推进技术, 2018, 39(3): 703-708.

LI Yi-jian^1,2,GAO Xu²,CHEN Hong²,LEI Gang²,JIN Tao^1,2. Similarity Analysis of Different Replacement Gases for Cryogenic Propellant Loading System[J]. Journal of Propulsion Technology, 2018, 39(3): 703-708.