Development of a new type shock tube without a diaphragm for gas-dynamic laser research
Résumé
A non-diaphragm type shock tube is being developed for the gas-dynamic laser research. The shock tube of this type has been designed to be operated without a diaphragm which the conventional shock tube has in order to separate the high and low pressure regions. By this new scheme, several advantageous properties are expected to be obtained. The vacuum vessel of the conventional shock tube should be opened to atmosphere every time after each shot in order to replace a diaphragm by a new one. This process always introduces impurities into the vacuum vessel. The reproducibility of experiments sometimes depends on the reproducibility of diaphragm-breaking-phenomena. In the non-diaphragm type shock tube, there is no necessity for replacing a diaphragm after each experiment. Thus, it will be possible to reduce influx of impurities in the experiment. In addition, the reproducibility and the efficiency of experiments may be expected to be largely improved.