项目名称: 超声速/高超声速下“锥形振荡运动”机理研究
项目编号: No.11202200
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 蒋增辉
作者单位: 中国航天空气动力技术研究院
项目金额: 28万元
中文摘要: 针对飞行器在天空中自由飞行时出现的"锥形振荡运动"现象,采用风洞自由飞试验为主要研究手段,辅以数值模拟,研究自由飞行状态下飞行器底部流场的变化规律与"锥形振荡运动"的相关关系,分析不同因素对飞行器底部流场的影响及对"锥形振荡运动"的影响,探索抑制其产生的措施和方法。项目预期将揭示"锥形振荡运动"的产生机理,分析影响其稳定性的因素,进而确定抑制其产生的方法措施。项目的研究成果对于保证飞行器安全飞行将具有重要意义,可以为飞行器气动外形设计提供实际指导。
中文关键词: 极限圆锥运动;非线性角运动;风洞自由飞试验;动稳定性;极限环
英文摘要: The relation between free-flight aircraft base flow and coning oscillation motion is to be researched mainly by wind tunnel free-flight test, combining numerical simulation, for the appearing of coning oscillation motion in free-flight aircraft in sky. The factors, having the effect on aircraft base flow and coning oscillation motion, is to be analysed, and the ways and means are to be explored to control it. By the project, the mechanism of coning oscillation motion is expected to be clarified, and the factors, influencing on the stability of coning oscillation motion, will be obtained. Then the ways and means to control coning oscillation motion are hoped to acquired. The study is very important on aircraft safety flight, and will guide the aerodynamic shape design of aircraft.
英文关键词: limit coning motion;nonlinear angular motion;wind tunnel free-flight test;dynamic srability;limit cycle