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8 Nov 2010

Volume 97, Issue 19, Articles (19xxxx)

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Appl. Phys. Lett. 97, 193101 (2010); http://dx.doi.org/10.1063/1.3504664 (3 pages)

Qingzhen Hao, Yong Zeng, Xiande Wang, Yanhui Zhao, Bei Wang, I-Kao Chiang, Douglas H. Werner, Vincent Crespi, and Tony Jun Huang
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Measurements of colliding shock wave and supersonic gas flow

D. Kaganovich, M. H. Helle, D. F. Gordon, and A. Ting

Appl. Phys. Lett. 97, 191501 (2010); http://dx.doi.org/10.1063/1.3511329 (3 pages) | Cited 1 time

Online Publication Date: 11 November 2010

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The collision between a laser generated shock wave and a supersonic flow from a gas jet was studied using pump-probe Schlieren shadowgraphy. The velocity of a gas escaping into vacuum from a high pressure gas jet nozzle was measured and verified in simulation. Time resolved tracking of the shock wave provided critical information about the gas jet vertical velocity and horizontal gas density profile. The measured velocity of the diatomic gas jet was found to be close to the theoretical maximum escape velocity of the gas released into vacuum. Modification of the hemispherical shock wave structure by the supersonic flow was minimal. However, the propagation of the shock wave was observed to be substantially effected by the gas flow.
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47.40.Nm Shock wave interactions and shock effects
47.60.Kz Flows and jets through nozzles
47.40.Ki Supersonic and hypersonic flows
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