2results about How to "Increase pressure ratio" patented technology

The application discloses a single-rotor turbofan engine, which comprises a rotating shaft, a fan, a centrifugal compressor, a turbine and a combustion chamber, all of which are located in an engine outer casing shell; the fan rotor, the centrifugal compressor rotor and the turbine rotor are fixedly assembled on the rotating shaft in sequence; a fan airflow channel is formed between the inner wall of the engine outer casing shell and the fan rotor, an inner bypass channel leads to the centrifugal compressor, and an outer bypass channel leads to the exhaust port of the engine; after the inner bypass airflow is discharged from the centrifugal compressor, the inner bypass airflow enters the combustion chamber to be mixed with fuel and combusted to generate high-temperature and high-pressure gas, which drives the turbine rotor to rotate and drives the fan rotor and the centrifugal compressor rotor coaxially arranged with the turbine rotor to rotate to perform work on airflow pressurization; and the high-temperature and high-pressure gas drives the turbine rotor to rotate and is discharged from the exhaust port. The single-rotor turbofan engine has the advantages of less pressurization stages, high pressure ratio, small engine size, simple structure, good reliability and reduced manufacturing cost.

The fluid oscillator is applied to the control method of high-load compressor corner area flow separation, and the structure of the fluid oscillator comprises an air inlet, a porous material, an intermediate transition section, a micro controllable valve, an inlet and an outlet, the air inlet is adjacent to the pressure surface side of the compressor blade, the porous material is connected with the air inlet, one end of the intermediate transition section is connected with the air inlet, the other end of the intermediate transition section is connected with the micro controllable valve, the micro controllable valve is connected with the inlet, the inlet is connected with the outlet, and the outlet is located on the end wall near the compressor cascade corner area. Compared with the traditional technology, the application does not need an external air source, has the advantages of simple structure, small volume and weight, long-term work reliability and strong engineering practicability. Through the method, the flow separation near the compressor corner area can be effectively inhibited, the single-stage compressor can obtain a higher pressure ratio, and the turbomachinery has a larger thrust-to-weight ratio and higher efficiency.