Back-bending gradually-expanding refrigeration wave rotor capable of outputting shaft work

Abstract

The invention discloses a back-bending gradually-expanding refrigeration wave rotor capable of outputting shaft work, and belongs to the field of gas expansion refrigeration. The refrigeration wave rotor capable of outputting the shaft work is mainly characterized in that a back-bending and gradually-expanding pressure oscillation tube is adopted. The curve shape of an axis of the pressure oscillation tube is described by adopting a Bezier curve with four control points, a complex curve shape can be realized only by changing the positions of several control points, so that design variables are effectively reduced, and structural optimization is facilitated. The oscillation tube is of a back-bending structure with the front section small in curvature and the rear section large in curvature, and the part with the small curvature can guarantee small jet flow loss, so that the gas wave expansion process is stable and efficient in operation; and the backward bending structure with the large subsequent curvature can enable the wave rotor to output the shaft work, so that a conversion mode of the expansion work of the wave rotor is further enriched, and the working condition adaptability of the wave rotor is improved. By adopting the gradually-expanding oscillation pipe, the combination of gas wave expansion and volume expansion can be realized, so that the expansion refrigeration degree of the wave rotor is further improved, the temperature of the expanded gas is reduced, and the refrigeration efficiency is improved.

Description

technical field [0001] The invention relates to a curved and gradually expanding refrigeration wave rotor capable of outputting shaft work, which belongs to the field of gas expansion refrigeration. Background technique [0002] The wave rotor is a device that realizes the energy exchange of gases with different pressures, and is currently widely used in the field of gas wave expansion refrigeration. Pressure oscillation tubes are distributed on the wave rotor, and the unsteady motion of the shock wave and expansion wave in the pressure oscillation tubes realizes the energy transmission and conversion 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 dissipation pressure oscillation tube refrigeration method that centrally outputs the expansion work in the form of heat energy, and a self-pressurized pressure oscillation tube refrigera...

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

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