作者曾研究了开孔为φ51mm的不锈钢圆筒形腔体黑体辐射源,实验考察了腔体壁面温度两种测量方法,选择四个代表点测量了腔体壁面的温度分布,成功地利用靶后腔体控制靶温,实现了良好的腔壁温度分布。本文则报道把已制成的不锈钢黑体空腔开孔从φ51 mm扩大到φ53 mm(开孔面积扩大8%)以后的实验结果。为了详细地测量腔壁的温度分布并考察自然对流对腔壁温度分 The author has studied the black hole radiation source of a stainless steel cylindrical cavity with an opening of φ51 mm. Two methods for measuring the wall temperature of the cavity were investigated. Four representative points were selected to measure the temperature distribution of the cavity wall. After the target was successfully used The cavity controls the target temperature and achieves good cavity wall temperature distribution. In this paper, the experimental results of expanding the open pores of stainless steel blackbody cavity from φ51 mm to φ53 mm (8% of open area) were reported. In order to measure the temperature distribution of the cavity wall in detail and examine the natural convection on the cavity wall temperature