DEVELOPMENTAL SCIENTIFIC RESEARCH ON CERAMIC CONTROLLABLE-STRUT FOR SUPERSONIC COMBUSTION

针对冲压发动机和超燃冲压发动机提出了一种在试验台上制作的支撑板，并在马赫数为1.5的超音速气流中进行了燃烧试验。该支柱模型由两部分组成，按流向划分，一部分支柱可以改变，例如，根据气流状况。因此，预计在任何燃料和空气条件下都可以进行阻燃。这种可控支柱的两个部分之间的间隙可以改变到60 mm，而且后支柱的移动速度也可以改变。结果表明，阻燃性能有所改善，但由于流动的不稳定性，其阻燃性能依赖于移动速度。支柱是陶瓷制成的，可加工性很好，即使经过多次十秒的实验也没有问题。

A newly devised strut made on an experimental bais was proposed for the ramjet or scramjet engine and its combustion experiments were carried out in supersonic airflow of Mach number 1.5. This strut model is composed of two parts divided streamwise and a part of the strut can be changed, for example, in response to airflow condition. Therefore, it is expected that the flame-holdindg is always possible in any condition of fuel and air. The intervening space between two parts of this controllable strut can be changed up to 60 mm and also the moving speed of the rear strut can be variable. It was found that the flame-holding characteristics were improved, but that they depended on the moving speed beacause of its unstesdiness of the flow. The strut was made of ceramics, whose machinability was so good, and had no problem even after many times of ten-second experiment.