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Influence of the diaphragm material at the entrance to the supersonic shock tube nozzle on the flow around a blunt body
Russian version
Monakhov N. A. 1, Popov P. A. 1, Sakharov V. A. 1, Poniaev S. A. 1, Kurakin R. O. 1
1Ioffe Institute, St. Petersburg, Russia
Email: nikolay.monakhov@mail.ioffe.ru, pavel.popov@mail.ioffe.ru, V.Sakharov@mail.ioffe.ru, Serguei.Poniaev@mail.ioffe.ru, r.kurakin@mail.ioffe.ru
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The results of experiments on measuring pressure and heat flow near the critical point of a blunt body in experiments on a shock tube with a nozzle are presented. It is shown that fragments of the diaphragm at the nozzle inlet have a significant effect on the flow structure near the critical point of the model and distort the signals of pressure and heat flow sensors. A method has been proposed to significantly improve the quality of a high-speed flow by selecting the optimal material and thickness of the diaphragms at the entrance to the supersonic nozzle. Keywords: shock tube, high-speed flow, diaphragm rupture, heat flux measurement.
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