SU977852A1 - Apparatus for controlling supersonic flows - Google Patents

Description

(5) CONTROL DEVICE

SUPER SECONDARY FLOWS

one

The invention relates to automatic control and can be used in pneumatic automation systems.

A device for controlling supersonic flows is known, which contains a nozzle and control channels. TO. Closest to the present invention is a device for controlling supersonic flows, comprising a housing, a discharge nozzle with a gas passage, Q Q wall, located inside the nozzle chamber. Connected to the input channel t 2.

The disadvantages of both known devices include a narrow range of 15 modes of operation.

The purpose of the invention is to expand the range of regulation.

The goal is achieved by the fact that in the proposed UE-20 supersonic flow control device, comprising a housing, a discharge nozzle with a gas-permeable wall, located inside the nozzle chamber connected

To the inlet channel, the nozzle chamber is formed by two bellows, and the partition mounted between them is provided with centering sleeves and placed on the longitudinal guide bodies.

The drawing shows the design of the proposed device.

Claims (2)

A device for controlling supersonic gas flows in nozzles and diffusers consists of a gas supply chamber 1, a pumping chamber 2, a feed nozzle 3, two spring bellows k with a gas-permeable wall, a nozzle chamber 5, a partition 6, centering bushings 7, longitudinal guides 8, the housing 9 and the inlet channel 10. In the flow nozzle 3 of the device, the gas flow is pre-expanded in a conical tapering nozzle, and then accelerated to sonic and supersonic speeds due to the sequential supply and pumping of gas through chambers 1 and 2. Flow rate, speed of flow and Mach number at the exit of the nozzle are controlled by changing the amount of pumped gas through the walls of the supersonic part of the feed nozzle and moving the partition 6. In the design mode, the partition is in the middle position between the flanges and centered coaxially with the nozzle bushings 7 changing the mode of operation and adjustment of the device, the partition is shifted to one side or the other from the middle position along the longitudinal guides 8 of the nozzle chamber 5. Compared with the known standard The proposed device for controlling supersonic flows through the use of an adjustable flow nozzle with a partitioned nozzle chamber formed by bellows and a moving partition allows extending the range of autonomous adjustment of the Mach number for a device with a tapering nozzle from 1 to 5, eliminating flow irregularity and danger of closing the boundary layer the walls above the sonic part of the nozzle in installations with a deep vacuum and small nozzles, reduce the amount of gas. 2-3 times in comparison with installations with a free-expanding jet due to pumping out the main amount of gas through the side wall of the nozzle under shallow vacuum and reducing the time spent on preparing and conducting the experiment by 30-50 due to the elimination of the permutation operation nozzles / Claim device for controlling supersonic flows, comprising a housing, a discharge nozzle with a gas-permeable wall, placed inside a nozzle chamber connected to an inlet channel, characterized in that, in order to expand the adjustment range, the nozzle chamber is formed by two bellows and a partition mounted between them it is fitted with centering sleeves and placed on the longitudinal guides of the housing. Sources of information taken into account in the examination 1. England patent number 1055919, cl. C 3 H 7, published. 01/18/06. 2. The patent of Germany No. 28104 4, cl. F 15 With 1/06, published. 13.09.79 (prototype).