Contact surface tailoring condition for shock tubes with different driver and driven section diameters
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The contact surface tailoring conditions normally used for shock tubes do not apply to shock tubes with different driver and driven section diameters. A theoretical model is presented that predicts the contact surface tailoring condition for a convergent shock tube, designed to have a larger driver cross-section area than the driven section. The tailoring condition previously developed for shock tubes with uniform driver and driven diameters can be recovered from this model. Representative on- and off-model performance is verified experimentally in a high-pressure convergent shock. Tailoring conditions calculated with the model are also given for commonly used driven gases (Ar, N2 and air) and He–N2 driver mixtures as a function of driver/driven area ratio.
KeywordsTailoring Convergent shock tube Contact surface
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