Treatment and flow control method for gas compressor casing with scattered seam type circumferential grooves

Abstract

The invention discloses a treatment and flow control method for a gas compressor casing with scattered seam type circumferential grooves, and belongs to the field of turbo machines. The method comprises the steps that the circumferential grooves are firstly formed in the blade tip casing of a gas compressor, then scattered seams are formed in the bottoms of the circumferential grooves, and the circumferential grooves are communicated through the scattered seams. According to the treatment and control method for the casing, the pressure difference in a blade channel can be effectively utilized, fluid nearby a pressure face can be transported to the position nearby a suction face through the circumferential grooves, and fluid of the downstream portion of the blade channel can be conveyed to the upstream portion through the seams in the bottoms of the circumferential grooves. Therefore, mass and momentum exchange between the fluid and main flow in the casing treatment structure can be promoted, a low-speed area caused by the leakage vortex of a blade tip can be effectively reduced, overflowing of leakage flow nearby the front edge of the blade tip is postponed, and therefore the stable work range of the gas compressor can be widened.

Description

technical field [0001] The invention relates to a treatment flow control method of a casing with a discrete slit type circumferential groove, which belongs to the field of impeller machinery and is suitable for industries such as aviation, energy and chemical industry. It can be used to improve the stable operating range of compressors, especially for high-load transonic compressors. Background technique [0002] As one of the core components of gas turbines, compressors are widely used in aero-engines, marine engines and energy industries. When the gas flows through the compressor, the rotating impeller does work on the gas flow, so the pressure of the gas is increased. Under certain rotational speed conditions, when the gas flow through the compressor decreases to a certain extent, flow instability such as rotating stall will occur, which will affect the stable working range of the compressor. When the compressor enters an unstable working condition, its performance will...

AI Technical Summary

Problems solved by technology

Under certain rotational speed conditions, when the gas flow through the compressor decreases to a certain extent, flow instability such as rotating stall will occur, which will affect the stable working range of the compressor.

When the compressor enters an unstable working condition, the performance will deteriorate obviously, and in severe cases, strong vibration will occur, causing serious damage to the machine parts

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