A back-bending progressively expanding refrigerated wave rotor capable of outputting shaft work

Abstract

The utility model relates to a back-bending and gradually expanding refrigeration wave rotor capable of outputting shaft work, belonging to the field of gas expansion refrigeration. The main feature of this kind of refrigerating wave rotor that can output shaft work is the use of back-bending and gradually expanding pressure oscillation tubes. The curve shape of the axis of the pressure oscillation tube is described by a Bezier curve with 4 control points. It only needs to change the position of a few control points to achieve a complex curve shape, which effectively reduces the design variables and facilitates structural optimization. This type of oscillating tube has a small curvature in the front part and a large curvature in the back part, and the small curvature part can ensure a small jet loss, so that the gas wave expansion process runs stably and efficiently; The output shaft work further enriches the transformation method of the expansion work of the wave rotor and improves the adaptability of the wave rotor to the working conditions. The gradual expansion of the oscillating tube can realize the combination of gas wave expansion and volume expansion, thereby further improving the degree of expansion and refrigeration of the wave rotor, reducing the temperature of the gas after expansion, thereby improving the refrigeration efficiency.

Description

technical field [0001] The invention relates to a back-bending gradually expanding refrigeration wave rotor capable of outputting shaft work, and belongs to the field of gas expansion refrigeration. Background technique [0002] The wave rotor is a device that realizes the energy exchange of different pressure gases, and is currently widely used in the field of gas wave expansion refrigeration. Pressure oscillating tubes are distributed on the wave rotor, and the unsteady motion of shock waves and expansion waves in the pressure oscillating tubes realizes the transmission and conversion of energy between gases with different pressures, thereby achieving the purpose of refrigeration. [0003] At present, the field of gas wave expansion refrigeration has developed an external circulation dissipative pressure oscillating tube refrigeration method that outputs the expansion work in the form of heat energy, and a self-pressurized pressure oscillating tube refrigeration method tha...

AI Technical Summary

Problems solved by technology

However, the wave rotors of these two methods all use a pressure oscillation tube with a straight cross section. The wave rotor itself is only used as a pressure exchange device and cannot output shaft work. There are problems of single output mode of gas expansion work and low cooling efficiency at the expansion end; The pressure oscillating tube with a straight cross-section also has the problem of limited volume expansion of high-pressure gas and insufficient expansion work output capacity, which leads to insufficient expansion of high-pressure gas and affects refrigeration efficiency.

In addition, the existing pressure oscillating tube refrigeration methods basically throttle the high-temperature gas, and the pressure can be dissipated in the form of heat, which has not been effectively utilized

Images