飛行體後彈體分離性能

Performance of Rear-Body Separation

劉宗燁(Tzong-Yeh Liou)

《中國航空太空學會學刊》 35卷2期 (2003/06) Pp. 163-168

https://doi.org/10.6124/TAASRC.200306_35(2).06

摘要

本文目的是以數值模擬方式探討飛行體後彈體分離脫節性能。本文方法是先建立分離脫節距離的運動模式，再對不同分離脫節距離下之分離空間進行流場數值模擬，獲得分離空間內的氣動力數據，再代入分離距離運動力學模式內，進行分離軌跡分析。本項研究顯示前後彈體的物性、氣動阻力，飛行馬串串數、與初始脫離速度，都會影響飛行體後彈體分離脫節性能。本項研究初步採用擬穩態的模式，然評估暫態效應可能會影響分離脫節性能，將待下一階段研究進一步探討。

關鍵字

分離脫節 ； 氣動阻力 ； 擬穩態

並列摘要

The purpose of this article is to study the phenomenon of the rear-body separation based on results from numerical simulation. At first, the equation of separation is derived to relate separation velocity to the drag forces acting on the front and rear bodies. Secondly, the drag forces are evaluated by solving the turbulent flow fields, enclosing the separation gap, based on the quasi-steady assumption. These drag forces are applied to analyzing separation distance through the derived separation equation.
Present study reveals that the motion characteristics of the front and rear bodies, including drag forces, flight Mach number, and initial separation velocity, all have great influence on separation performance. Although quasi-steady assumption is used in present computations, the transient effect on separation distance is worth further studying.

並列關鍵字

Rear-body separation ； Aerodynamic drag ； Quasi-steady