DEVELOPMENTAL SCIENTIFIC RESEARCH ON CERAMIC CONTROLLABLE-STRUT FOR SUPERSONIC COMBUSTION

提出了一种用于冲压发动机或超燃冲压发动机的新型支撑结构，并在马赫数为1.5的超声速气流中进行了燃烧实验。该支杆模型由沿流方向划分的两部分组成，其中一部分可以根据气流状况而改变。因此，期望在任何燃料和空气条件下都能保持火焰。该可控支柱的两部分之间的间隔可以改变60毫米，并且后支柱的移动速度也可以改变。结果表明，火焰的保持特性得到了改善，但由于其流动的不均匀性，火焰的保持特性取决于运动速度。支柱是由陶瓷制成的，其可加工性非常好，即使经过多次十秒钟的实验也没有问题。

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.