一、A_1型发动机环形火焰筒的改进 为了实现性能要求,我们对A_1型发动机环形火焰筒(简称环Ⅰ)进行了下列改进。 1.采用槽式冷却。照片是改进后的环Ⅰ。在稳定性试验中,如采用孔式冷却环Ⅰ相邻头间转接段气膜片曾产生烧蚀。主要原因是环Ⅰ的头部热负荷比通常值大,头数又少,相邻头间集中了更多 First, the A_1-type engine ring flame barrel improvement In order to achieve performance requirements, we A_1-type engine ring flame tube (referred to as ring Ⅰ) made the following improvements. 1. Trough cooling. The photograph is an improved ring I. In the stability test, such as the use of hole cooling ring Ⅰ between the adjacent head of the gas diaphragm patch have had ablation. The main reason is that the heat load on the head of the ring I is larger than usual, with fewer heads and more concentrated between adjacent heads