RBCC-RKT两级入轨飞行器起飞质量估算方法

推进技术 ›› 2013, Vol. 34 ›› Issue (5): 603-608.

RBCC-RKT两级入轨飞行器起飞质量估算方法

阮建刚,何国强,吕翔

西北工业大学航天学院,陕西西安 710072;西北工业大学航天学院,陕西西安 710072;西北工业大学航天学院,陕西西安 710072

发布日期:2021-08-15
作者简介:阮建刚(1976—),男,博士生,研究领域为航空宇航推进理论与工程。E-mail:fortran2009@mail.nwpu.edu.cn

Takeoff Mass Estimation Methods in Two-Stage-To-Orbit RBCC-RKT Launch Vehicle

School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China;School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China;School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China

Published:2021-08-15

摘要/Abstract

摘要： 针对液体火箭发动机真空比冲基本不变,火箭基循环组合发动机(RBCC)比冲随着飞行条件不断变化的特点,提出了将增广拉格朗日遗传算法优化第一级飞行弹道与传统液体火箭质量估算方法估算第二级起飞质量相结合,获得水平起飞两级入轨RBCC—RKT飞行器第一级起飞质量的估算方法, 为总体方案初步设计论证提供参考。通过算例,分析了一级RBCC飞行器惰性质量比、最高动压,气动特性与起飞质量之间的关系。计算表明,降低RBCC飞行器惰性质量比、提高一级飞行器最大飞行动压、提高飞行器升阻比,都能有效地降低一级起飞质量。 

关键词: 两级入轨;火箭基循环组合发动机;起飞质量;惰性质量比;增广拉格朗日遗传算法 

Abstract: A method for estimating the takeoff mass of RBCC-RKT Two-Stage-To-Orbit(TSTO) horizontal takeoff launch vehicle was established to provide a reference for the scheme demonstration and preliminary design of TSTO vehicle Concept. The second stage takeoff mass was computed by conventional method for estimating multi-stage liquid-propellant rocket engine takeoff mass because vacuum specific impulse of liquid-propellant rocket engine was nearly invariable, while the first stage takeoff mass was optimized with the numerical integration for the motion equations of centroid by Augmented Lagrangian Genetic Algorithm because specific impulse of RBCC changed constantly with the flight condition. Possible factors influencing takeoff mass such as RBCC vehicle inert mass coefficient, maximum dynamic pressure, and aerodynamic characteristics were analyzed. The results show that the first stage takeoff mass will be reduced effectively by reducing RBCC vehicle inert mass ratio, increasing the first stage vehicle maximum dynamic pressure, or increasing the aircraft lift-drag ratio. 

Key words: Two-Stage-To-Orbit; RBCC; Takeoff mass; Inert mass ratio; Augmented Lagrangian Genetic Algorithm

阮建刚,何国强,吕翔. RBCC-RKT两级入轨飞行器起飞质量估算方法[J]. 推进技术, 2013, 34(5): 603-608.

RUAN Jian-gang, HE Guo-qiang, LV Xiang. Takeoff Mass Estimation Methods in Two-Stage-To-Orbit RBCC-RKT Launch Vehicle[J]. Journal of Propulsion Technology, 2013, 34(5): 603-608.

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