Blade boundary layer suction jet device

Abstract

The invention relates to a blade boundary layer suction jet device. The blade boundary layer suction jet device comprises a blade body, a rotor rotationally arranged on the airflow inlet and outlet end of the blade body and an arc-shaped blade leading edge covering the rotor and fixedly connected to the blade body. A plurality of stationary blade flow passages are arranged on the surface of the airflow inlet and outlet end of the blade body side by side. A plurality of spiral moving blade runners with the axis of the rotor as the center are arranged on the surface of the rotor. The stationaryblade runners are in one-to-one correspondence with the moving blade runners, the blade leading edge is fixed to the blade body, then a first gap for airflow inlet / outlet is formed between the blade leading edge and one surface of the blade body, a second gap for airflow inlet / outlet is formed between the blade leading edge and the other opposite surface of the blade body, and the first gap and the second gap both are communicated with the stationary blade runners. According to the blade boundary layer suction jet device, the stable and continuous jet can be obtained by driving the rotor to rotate through one driving source, the size and the direction of the jet are changed by controlling the rotating speed and direction of the rotor, and the control method is simple,

Description

technical field [0001] The invention relates to the technical field of active flow control, in particular to a suction jet device based on zero working fluid jet and applied to blades. Background technique [0002] Flow separation is a very important and complex flow phenomenon in fluid mechanics, which is commonly found in various practical projects such as aerospace and power machinery. In many power machines, fluid separation from solid wall surfaces is unavoidable. Although separated flow can improve heat and mass transfer and mixing efficiency, it often causes a large amount of energy loss due to its inherent unsteadiness. Flow separation will not only increase the resistance of the aircraft, reduce the lift force, cause backflow or even stall, but also reduce the operating efficiency of the power machinery, cause the power machinery to vibrate, and endanger the safe operation of the unit. For example, in an axial flow compressor, the separation of the flow around the...

AI Technical Summary

Problems solved by technology

The jets of the traditional zero-propellant jet flow control technology are usually distributed in dots. If a large area is required to cover the surface of the blade, multiple zero-propellant jet actuators need to be arranged, so generally multiple driving sources need to be arranged for driving, and it is easy to appear The jet is not continuous and it is not easy to control the size and direction of the jet

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