SUPERSONIC GAS INJECTOR Russian patent published in 2011 - IPC F04F5/22 

FIELD: machine building.

SUBSTANCE: injector consists of case with channel of low pressure gas and of supersonic nozzles and mixture chambers wherein each nozzle communicates with channel of high pressure gas at outlet. The supersonic nozzles are circular. The mixture chambers are united into one two-cascade chamber with a separate supersonic nozzle in each cascade. The channel of low-pressure gas, supersonic nozzles, and the first cascade of the mixture chamber are set coaxially with the second channel. The channel of high pressure gas and the nozzle of the second cascade are set coaxially outside the first cascade. The cascades of the mixture chamber are converging. The second cascade of the mixture chamber with its inlet is connected with outlets of the first cascade of the mixture chamber and the nozzle of the second cascade. The channel of high pressure gas of the second cascade has a control valve before the nozzle. When the injector is operating high pressure gas is supplied into mixture chamber via channels and nozzles of the first and second cascades in different weight shares specified with the control valve. A common flow of mixture created at mixing in the chambers is supplied to a consumer.

EFFECT: increased full pressure in gas flow, raised efficiency, reduced axial dimension of injector.

3 cl, 1 dwg