4results about How to "Improve isentropic efficiency" patented technology

The invention discloses a design method of a centrifugal compressor with an asymmetric bladed diffuser coupled with a volute tongue, which adopts the asymmetric bladed diffuser and increases the distance from the outlet of the diffuser to the volute tongue on the asymmetric bladed diffuser to improve the structure of the existing centrifugal compressor. The non-uniformity, caused by a volute tongue structure, of an internal flow field of the centrifugal compressor is effectively reduced, internal flow separation of the vaned diffuser is restrained, the efficiency and the pressure ratio of the compressor are improved, meanwhile, the stable working range of the centrifugal compressor is widened, and the pneumatic stability of the centrifugal compressor is improved.

The present invention provides an air-inflation structure of a compressor and a compressor. The air-inflation structure of the compressor comprises: a partition, a flange and a cylinder body with an inner cavity, the partition is arranged between the flange and the cylinder body, so that the flange is connected to the cylinder body through the partition; an air-inflation chamber that can be communicated with the inner cavity is arranged on the partition, a first air-inflation channel that can be communicated with the air-inflation chamber is arranged on the flange, a valve plate is arranged in the air-inflation chamber, and the valve plate can move in the air-inflation chamber to separate or conduct the first air-inflation channel from the air-inflation chamber. The present invention has the advantages of reasonable design and simple structure, can reduce the volume of the back pressure chamber, thereby improving the isentropic efficiency of the compressor, reducing the power consumption of the compressor, and can also reduce the manufacturing cost.

The application provides a compressor non-axisymmetric end wall shaping method based on an adjoint shape optimization, and belongs to the technical field of aero-engine compressor design, in particular to: taking an axisymmetric end wall compressor as an optimization object, sequentially completing a cascade single-channel original geometric model establishment, structured grid division, obtaining the isentropic efficiency of the compressor designed by using the axisymmetric end wall through flow field simulation, establishing an optimization target and a constraint condition, solving the sensitivity of a design variable based on an adjoint shape optimization method, arranging control points on the outer surface of the end wall, combining the total displacement amount of the control points with the sensitivity calculation, realizing the end wall grid deformation through a radial basis function, iteratively optimizing the performance of the current end wall geometric configuration through simulation verification, and until the end wall meets the optimization target and the constraint condition. The application improves the optimization efficiency and shaping precision of the compressor end wall, improves the isentropic efficiency of the compressor, and guarantees the stability of the performance parameters of the optimized compressor.

The invention discloses a compressed air energy storage system based on a compression-expansion dual-purpose unit, relates to the technical field of compressed air energy storage, and solves the technical problem that the existing compressed air energy storage system is relatively complex and has a high cost. The key points of the technical solution are to use a single-stage multi-cylinder rotary compression-expansion dual-purpose unit to replace two sets of equipment, a compressor unit and an expansion unit, which has the advantages of large and adjustable pressure ratio, high isentropic efficiency, low manufacturing cost and suitability for large and medium-sized units; water is used to adjust the compressed air outlet temperature and to enhance the heat transfer of the heat exchanger; an air-water separator, a small water tank and an air-water mixer are provided to achieve the water sprayed in the compression and inflation process. After being cooled by the heat exchanger, it is stored under high pressure and reused in the expansion work process, which can increase the working capacity of the compressed air in the expander and also enhance the heat transfer of the heat exchanger.