Measuring the velocity of a gas wake in a shock tube from the induced electromotive force
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It is shown that the velocity of the gas wake in a shock tube can be measured from the induced electromotive force for argon and xenon at initial pressures greater than 1 mm Hg and conductivities above 1 mho/cm. In a strongly ionized gas (α > 0. 01) the flow velocities measured directly behind the shock front are close to the flow velocities corresponding to steady-state ionization equilibrium. It is noted that the expenditure of energy to dissociate an admixture of air causes a noticeable increase in the velocity of the flow along the entire plug of hot gas. A 3–6% acceleration of the flow along the plug. in the equilibrium ionization zone is observed; this is probably caused by the action of the boundary layer formed on the walls of the shock tube on the free flow.
KeywordsMathematical Modeling Boundary Layer Argon Mechanical Engineer Flow Velocity
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- 1.M. Sakuntala, B. E. Clotfelter, and W. B. Edwards, “Elec- tromotive force in a highly ionized plasma moving across a magnetic field,” J. Appl. Phys., vol. 30, no. 11, p. 1669, 1959.Google Scholar
- 2.H. Petshek, P. Rousse, H. Click, A. Kane, and A. Kantro- vitz, “Spectroscopic studies of highly ionized argon produced by shock waves,” J. Appl. Phys., vol. 2, no. 6, p. 83, 1955.Google Scholar
- 3.H. T. Nagamatsu and R. E. Speer, “Magnetohydrodynamic results for highly dissociated and ionized air plasma,” Phys. Fluids, vol. 4, no. 9, p. 1073, 1961.Google Scholar
- 4.P. Gloersen, Some Unexpected Results of Shock Heating of Xenon, Phys. Fluids, vol. 3, no. 6, p. 857, 1960.Google Scholar
- 5.T. V. Bazhenova, “Changes in flow velocity behind a shock wave in a shock tube,” collection: Physical Gas Dynamics and Heat Transfer [in Russian], Izdatel'stvo AN SSSR, p. 31, 1961.Google Scholar
- 6.T. V. Bazhenova, I. N. Naboko, and O. A. Predvoditelava, “The effect of dissipation on the parameters of flows behind shock waves in a shock tube,“ collection: Physical Gas Dynamics and the Properties of Gases at High Temperatures [in Russian], Izdatel'stvo “Nauka,” 1964.Google Scholar