DIFFUSER OF TURBOMACHINE Russian patent published in 2013 - IPC F04D29/44 

FIELD: machine building.

SUBSTANCE: turbomachine includes an annular combustion chamber with a chamber bottom, a compressor containing an outlet centrifugal stage and an annular diffuser allowing to dissipate a gas flow leaving the compressor and direct that gas flow to the specified spraying systems. Combustion chamber bottom includes spraying holes, in which spraying systems are installed. Diffuser includes radially directed inlet part, intermediate bent part and outlet part. Inlet part includes diffusion channels connected to the compressor outlet. Outlet part includes a number of straightening vanes arranged in a circumferential direction with gaps. Outlet part is inclined in relation to the turbomachine axis in the direction of the combustion chamber so that in the sectional plane containing turbomachine axis the intermediate axis of a flowing path at the outlet of diffuser outlet part passes through the chamber bottom between maximum radius and minimum radius of the chamber bottom. Distance in x-direction along the flow line between the middle point of the flowing path on rear edge of straightening vanes and the specified centre is more than or equal to three-time height of the above flowing path on rear edge of straightening vanes. Number of straightening vanes is at least by four times more than number of spraying systems.

EFFECT: invention allows dissipating swirls to recommended distance between rear edge of straightening vanes and spraying holes.

2 cl, 5 dwg