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主要介绍再入飞行器防热层烧蚀诱导的滚转异常,包括端头烧蚀外形不对称和锥面防热层烧蚀引起的滚转力矩·重点介绍碳-酚醛布带缠绕的防热层滚转力矩机理的试验研究,包括在50兆瓦电弧加热器上及 RPL 火箭发动机排气上进行的地面研究结果及飞行试验结果。研究结果表明,布带缠绕螺旋形方向,布带缝合搭接方向,布带偏斜,以及烧蚀表面不对称特征是产生滚转力矩的主要机理。文中介绍了控制滚转异常的各种方法:从设计、材料、结构、生产与工艺上减小质量不对称及气动不对称,增大静裕度,选好最佳初始滚速;从防热套生产工艺上控制滚转力矩;采用主动式滚速控制系统和被动式滚速控制系统,文中对这些系统作了简要介绍。本文最后提出了几点结论性意见与看法。
Mainly introduced re-entry aircraft thermal layer ablation induced roll anomaly, including the end of the asymmetric shape of the ablation and taper heat ablation erosion caused by the rolling moment · Focus on the carbon-phenolic tape wrapped around the heat-proof layer Experimental studies on the tumble torque mechanism include ground studies and flight test results on a 50 MW arc heater and RPL rocket engine exhaust. The results show that the main mechanism of rolling torque is the spiral winding direction, the stitching lap direction, the deflection of the tape and the unsymmetrical ablation surface. In this paper, various methods to control roll anomaly are introduced: reducing mass asymmetry and aerodynamic asymmetry between design, materials, structure, production and workmanship, increasing static margin and selecting the best initial roll speed; Set of production processes to control the rolling torque; the use of active roll control system and passive roll speed control system, the paper made a brief introduction of these systems. At the end of this article, I put forward some concluding observations and opinions.