Operating safety of a hot-shot wind tunnel with combined test gas heating in stabiliza-tion mode
V.V. Shumskii and
M.I. Yaroslavtsev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: shumsky@itam.nsc.ru, yaroslav@itam.nsc.ru
Keywords: hot-shot wind tunnel, settling chamber, test gas, stabilization of parameters, pressure multiplier, controlled diaphragm, driver air
Pages: 563–568
Abstract
In the present paper, we
analyze emergency situations typical of short-duration wind tunnels with
electric-arc or combined test-gas heating in the presence of stabilization and
diaphragm-rupturing systems, which occur in the case of no discharge initiation
in the settling chamber, with the capacitor battery having remained charged during
the start of wind-tunnel systems. For avoiding such emergency situations, some
additional changes based on using feedback elements are introduced into the
wind-tunnel design: the piston of the fast-response valve is made hollow for
increasing the volume of the shutoff cavity and for making the release of
pressure from this cavity unnecessary; the high-pressure channel, which
connects the piston and the piston rod with the settling-chamber cavity, is
filled with a liquid and is closed from the side of the settling chamber with a
piston; the device for controlled diaphragm breakdown is provided with an
external electric circuit intended to control the diaphragm-rupturing process.
Those modifications allow subsequent functioning of the wind-tunnel systems
only in the presence of heat-supply-induced pressure growth in the settling
chamber of the wind tunnel.
DOI: 10.1134/S0869864317040072
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