Transcript Структура течения в

Khristianovich Institute of Theoretical and
Applied Mechanics SB RAS
The Pulse Generator for the
Supersonic Flow Structure
Control
ГЕНЕРАТОР ИМПУЛЬСОВ ДЛЯ УПРАВЛЕНИЯ
СТРУКТУРОЙ СВЕРХЗВУКОВОГО ПОТОКА
P.K. Tretyakov, V.A. Zabaykin, I.E. Naumov
7th International Seminar on Flame Structure, July 11-15
Novosibirsk, 2011
Introduction
The organization and control of pseudo-shock both in case of
an isothermal flow, and at the burning organization are
represent scientific and practical interest.
Promising ways of control the pseudo-shock are pulseperiodic energy addition, which may be mechanical, kinetic,
and gas-dynamic in other ways.
Channel model 30 × 40 mm flat-cooled nozzle M = 2.
A feature is the ability to channel variations in the geometry of the channel by
joining sections of different lengths and the angle of expansion of the bottom wall
from 0 to 10 degrees. For optical measurements provide quartz windows.
Static pressure is measured at the top or bottom wall with a step of 20 mm. For
energy addition are special sections on the length of 50 mm.
Side view
Top view
Mechanical influence on the flow structure was carried out using a mechanical
blade, mounted on the motor shaft. The blade was set so to ensure an overlap of
output channel (up to 40% of the channel, depending on the geometry of the blade)
Location of pseudo-shock wave
depending on position blade with
frequency 7,27 Hz
Velocity of pseudo-shock wave by
means blade on the motor axis with
frequency 7,27 Hz
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ОВЕН
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ПК
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•1-Fuel,
•2- an oxidizer,
•3- reducer,
•4- magnetic valve,
•5- return valve,
•6- manometer (fuel),
•7- manometer (oxidizer),
•8- flow rate measure
washer (fuel),
•9- flow rate measure
washer (oxidizer),
•10- gas generator,
•11- pressure sensor
(Sapphire),
•12- channel,
•13- timer (ОВЕН),
•14- personal computer
Various modes of
gas generator are
investigated. With
various time
intervals under
control of a timer
«ОВЕН»
Examples of programming
of a timer «ОВЕН» for
supply on gas generator
hydrogen and ignition
mixtures by means glow
plug, air moved constantly
(α~0,8 – 0,95)
Energy addition from Gas-Generator in the channel it is carried out through
specially prepared section, which depending on objectives can be mounted in
different parts of the channel of constant section. That will allow to receive
wider range for gas-dynamic influence.
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Scheme of device for gas-dynamic influence on
supersonic flow are proposed and investigated.
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It is shown that this scheme is working and
allowed to change structure of hot and cold supersonic flow.