摘要
为了满足HAN(硝酸羟铵)基单组元催化分解发动机对高性能喷注器的需求,开展基于3D打印技术的多圈多喷注孔高性能喷注器设计研究。以3D打印喷注器为对象进行传热特性仿真、流阻特性及热试性能试验研究,提出3D打印喷注器流阻计算沿程损失修正系数。试验结果表明:3D打印喷注器流阻随化铣总时间的增加而降低,流阻降低速率逐渐减小;发动机可以实现常温可靠起动,高床载下分解效率达到0.992;发动机起动响应时间随着初始温度降低而增加,可通过控制最长间隔时间提高响应时间一致性。
In order to meet the demand of HAN(Hydroxylammonium nitrate)-based monopropellant catalytic decomposition thrust chamber for high performance injector,the integrated design of multi-cycle multi-nozzle injector based on 3D printing technology was studied.The heat transfer characteristics,flow resistance characteristics and thermal test characteristics of 3D printing injector were studied.The pressure loss coefficient of flow resistance calculation was put forward.The experimental results show that the flow resistance of 3D printing injector decreases with the increase of the total milling time,and the decreasing rate decreases gradually.The engine can be initiated reliably at room temperature.The decomposition efficiency reached 0.992 under high load.The engine ignition time increases with the decrease of the initial temperature and the consistency of ignition time can be improved by controlling the interval time.
作者
徐丁欢
孙策
董佳磊
党涵宇
陈鸿麟
XU Dinghuan;SUN Ce;DONG Jialei;DANG Hanyu;CHEN Honglin(Xi’an Aerospace Propulsion Institute,Xi’an 710100,China;Academy of Aerospace Propulsion Technology,Xi’an 710100,China)
出处
《火箭推进》
北大核心
2025年第2期87-93,共7页
Journal of Rocket Propulsion
关键词
3D打印
喷注器
沿程损失系数
additive manufacturing
injector
pressure loss coefficient
作者简介
徐丁欢(1994—),男,硕士,工程师,研究领域为液体火箭发动机设计。;通信作者:陈鸿麟(1972—),男,高级工程师,研究领域为液体火箭发动机设计。
