The Pulse Generator for the Supersonic Flow Structure Control ГЕНЕРАТОР ИМПУЛЬСОВ ДЛЯ УПРАВЛЕНИЯ СТРУКТУРОЙ СВЕРХЗВУКОВОГО ПОТОКА Khristianovich Institute.

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The Pulse Generator for the Supersonic Flow Structure Control ГЕНЕРАТОР ИМПУЛЬСОВ ДЛЯ УПРАВЛЕНИЯ СТРУКТУРОЙ СВЕРХЗВУКОВОГО ПОТОКА Khristianovich Institute of Theoretical and Applied Mechanics SB RAS P.K. Tretyakov, V.A. Zabaykin, I.E. Naumov Novosibirsk, th International Seminar on Flame Structure, July 11-15

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 pulse- periodic energy addition, which may be mechanical, kinetic, and gas-dynamic in other ways. Introduction

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.

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) Side view Top view

Velocity of pseudo-shock wave by means blade on the motor axis with frequency 7,27 Hz Location of pseudo-shock wave depending on position blade with frequency 7,27 Hz

водородводород воздухвоздух ПК ОВЕН 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.

Scheme of device for gas-dynamic influence on supersonic flow are proposed and investigated. It is shown that this scheme is working and allowed to change structure of hot and cold supersonic flow.