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为了确定再入体防热层滚动力矩产生的原因和机理,对6个50兆瓦防热层烧蚀模型和一个风洞模型的试验数据进行了研究,并把从烧蚀模型测得的滚动力矩数据与所用的材料及其工艺特性进行了相关,从而找到了对滚动力矩方向和数值有重要作用的那些数据。本文根据这些数据推论材料与工艺特性对力矩的影响,还利用烧蚀模型表面形状的测量结果来绘制表面形状图,并对其可能产生的滚动力矩进行分析估算。计算得到的力矩方向是正确的,但力矩数值则要大于实验数值。此外,文章还推导了一个简单的换算关系,以便于对50兆瓦模型测得的力矩数据和全尺寸防热层数据进行比较。根据这个换算关系,50兆瓦模型的力矩数值要比全尺寸防热层的力矩数值大得多。文章对产生这种差别的可能原因也作了讨论。
In order to determine the cause and mechanism of the rolling torque of the re-entry thermal barrier, the test data of six 50-MW thermal barrier ablation models and a wind tunnel model were studied and the rolling measured from the ablation model Torque data is correlated with the materials used and their process characteristics, thus finding those data that have an important effect on the direction and magnitude of rolling torque. Based on these data, this paper deduces the influence of material and process characteristics on torque, and also uses the measurement results of the surface shape of the ablation model to draw the surface shape diagram, and analyzes the possible rolling moments. The calculated torque direction is correct, but the torque value is greater than the experimental value. In addition, the article deduces a simple conversion relationship that allows comparison of torque data measured with a 50 MW model with full-size heat shield data. Based on this conversion, the torque value of the 50 MW model is much larger than the torque value of the full size heat shield. The article also discussed the possible causes of this difference.