文摘
|
高超声速巡航飞行器(HCV)是21世纪国际空天技术竞争的焦点, 它的飞行性能可以用初始发射质量与广义有效载荷之比衡量.文献[1]建立了该性能的耦合分析框架.在这个框架下进一步考虑了离心力和滑翔距离两个重要因素的影响.定量分析表明: 给定飞行距离, 对HCV飞行性能影响最大的是巡航速度, 其次是升阻比, 再次是巡航发动机比冲.随着飞行距离的增加, 由于离心力和滑翔距离的计入, 火箭动力HCV的飞行性能大幅提高, 从近中程到远程均显著优于经典的最小能量弹道.吸气式冲压发动机尽管比冲大幅优于火箭发动机, 但在巡航速度适用范围和飞行器升阻比方面, 均不及后者.综合而言, 火箭动力HCV是现阶段非常有竞争力的选择 |
其他语种文摘
|
The flight performance of hypersonic cruise vehicles (HCVs), a competitive focus of international aerospace technologies in the 21st century, can be measured by a ratio of the initial boost mass to the generalized payload. A coupling frame to analyze the performance was established in Ref.[1]: Under the frame, two important effects, namely the centrifugal force and glide distance, have been further taken into account in this article. It was shown quantitatively that for a given distance, the first important factor to affect the flight performance of HCVs is the cruise speed, the second is the lift-to-drag ratio, and the third is the specific impulse of the cruise engine. As a flight distance increases, the performance of a rocket-based HCV, greatly improved due to the centrifugal force and glide distance taken into account, is significantly superior to the classical minimum-energy trajectory from short-middle to long range. A hypersonic air-breathing ramjet, though its specific impulse much higher than that of a rocket engine, is not so good as the latter in terms of the cruise speed range and lift-to-drag ratio. It is concluded that rocket-based HCVs flying at the optimal speed are a very competitive choice at the current stage |
来源
|
力学学报
,2011,43(2):249-254 【核心库】
|
关键词
|
高超声速巡航飞行器
;
飞行性能
;
最佳巡航速度
;
离心力
;
滑翔距离
|
地址
|
中国科学院力学研究所, 中国科学院高温气体动力学重点实验室, 北京, 100190
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
0459-1879 |
学科
|
航空 |
基金
|
国家自然科学基金创新研究群体项目
|
文献收藏号
|
CSCD:4171684
|