Abstract
The approximate, one dimensional blast wave theory of Harris is modified to take into consideration the effect of radiation losses from plasmas behind strong shock waves produced in electromagnetic shock tubes. The semi-empirical radiation theory of Kivel is used in evaluating the resulting modified shock expansion equation. The influence of various shock tube operating parameters such as energy input and ambient density on the shock wave velocity attenuation via radiation is examined. The predictions suggested by the proposed theory are confirmed by means of experimental data obtained in a conical discharge section electro-magnetic shock tube. It is seen that the most severe effect due to radiative losses occurs near the gaseous discharge. Radiation losses are found to be unimportant at distances downstream of the electrical discharge when the gas density is low.
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