FIELD: educational means. SUBSTANCE: electric heaters are used, which are mounted behind the compressor. To excite surging oscillations at compressor operation, air temperature behind the compressor is increased gradually. Improvement in air volume reduces capacity of restrictor. Pressure which arises in the receiver causes surging break-down condition in the compressor, which is characterized by sharp drop in head of step and emanation of part of air through input device. Process of reverse air flow is accomplished with sound bang, and may be observed visually by reduction in volume of the receiver. EFFECT: multiple demonstration and modelling of surging. 1 dwg
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