External excitation double drive travelling wave thermoacoustic heat engine

A traveling-wave thermal-acoustic and dual-drive technology, which is applied in the direction of machines/engines, mechanical power generating mechanisms, mechanical equipment, etc., can solve the problems that are difficult to use in compact occasions, without external excitation systems, and low volume specific power, etc. problems, to achieve the effect of convenient operation, excellent frequency selection characteristics, and improved quality factors

Inactive Publication Date: 2009-08-05
WUHAN INSTITUTE OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

Although these systems have their own characteristics in improving the performance of thermoacoustic heat engines, the disadvantages are that the volume specific power is low, and it is difficult to be used in compact occasions; the second is that there is no external excitation system, and generally requires a large start-up temperature difference

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  • External excitation double drive travelling wave thermoacoustic heat engine

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Embodiment Construction

[0021] The present invention is further described below through the examples, but the examples will not constitute a limitation of the present invention.

[0022] Such as figure 1 As shown, the external excitation double-drive traveling wave thermoacoustic heat engine includes a first exciter 1, a first thermoacoustic device 2, a first first cooler 3, a first varactor resonant cavity 4, and a second exciter 5. The second thermoacoustic device 6, the ring sound transmission channel shell 7, the second cooler 9, and the second varactor resonant cavity 10; the ring sound transmission channel shell 7 is a ring traveling wave transmission channel 8, and the ring sound transmission channel The length of the channel housing 7 is a wavelength, and the first port, the second port, the third port and the fourth port are symmetrically arranged on the ring sound transmission channel housing 7, and the first port and the second port , the third port, and the fourth port communicate with t...

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Abstract

The invention relates to an external excitation dual-drive traveling-wave thermoacoustic engine which adopts the structure that an annular-sound transmission channel shell is internally provided with an annular-sound transmission channel, the length of the annular-sound transmission channel shell is one wavelength, the annular-sound transmission channel shell is symmetrically provided with ports, a first vibration exciter is arranged on the first port of the annular-sound transmission channel shell, the output end of the first vibration exciter faces to the first port, a second vibration exciter is arranged on the third port of the annular-sound transmission channel shell, and the output end of the second vibration exciter faces to the third port; the second port or / and the fourth port of the annular-sound transmission channel shell is / are provided with transfiguration resonant cavities, the opening end of each transfiguration resonant cavity faces to the second port or / and the fourth port, and a first thermoacoustic part, a second thermoacoustic part, a first cooler and a second cooler are respectively symmetrically distributed in the annular-sound transmission channel. The invention has the advantages of simple structure, high efficiency, little startup temperature difference and good frequency selection property.

Description

technical field [0001] The invention belongs to the field of refrigeration and low-temperature engineering technology and small thermodynamic technology, and specifically relates to a high-efficiency and large-amplitude externally excited double-drive traveling wave thermoacoustic heat engine. Background technique [0002] A thermoacoustic heat engine is an energy conversion device that uses the thermoacoustic effect to convert heat into pressure waves (sound). The thermoacoustic effect refers to the time-average energy effect produced by the thermal interaction between the compressible fluid working medium (the first medium) and the solid working medium (the second medium) when it vibrates acoustically in a heat-engine system. It is the time-average heat flow and time-average work flow caused by the interaction between the solid medium in the sound field and the oscillating fluid. According to the direction of energy conversion, thermoacoustic effects can be divided into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G7/00
Inventor 吴锋丁国忠李端勇邹文径杨志春舒安庆
Owner WUHAN INSTITUTE OF TECHNOLOGY
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