PHYSICS AND MATHEMATICS

Features of experimental research on supersonic atmospheric vacuum driven tunnel

E. A. Prokopenko^a, N. P. Savischenko^a, A. V. Shevchenko^a, S. A. Ponyaev^b, K. V. Tverdokhlebov^b, S. A. Yashkov<sup>a

a</sup> Mozhaiskiy Space Military Academy, St. Petersburg
^b Ioffe Institute, St. Petersburg

Abstract: At present, experimental studies of supersonic currents are carried out on complex experimental installations, such as vacuum driven tunnels and shock tubes. It is possible to use vacuum driven tunnels to study supersonic currents with Mach numbers that are less than 4. The article presents the results of research of processes occurring in a vacuum driven tunnel at startup. The analysis of the results showed that the stationary mode of supersonic currents realized in the tunnel has a duration of about 3 seconds, which is confirmed by the shadow current patterns presented in the work. This circumstance allows using available atmospheric and vacuum driven tunnel to study the aerodynamic characteristics of aircraft in Mach numbers from 1.5 to 4.

Keywords: vacuum driven tunnel, experimental studies, supersonic current.

Received: 19.12.2018

DOI: 10.23670/IRJ.2018.78.12.005

 English version: DOI: 10.23670/IRJ.2018.78.12.005