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STABILITY OF CONSTANT PRESSURE EXPANSION VALVE WITH PRESSURE WAVE IN PIPE-LINE BY DEAD TIME.

[In Japanese. / En japonais.]

Author(s) : ARAI M., HIGUCHI K.

Type of article: Article

Summary

A CONSTANT PRESSURE EXPANSION VALVE INSTABILITY CAN BE CAUSED BY INTERACTION OF THE PRESSURE WAVE IN THE DOWNSTREAM PIPE-LINE WITH THE DYNAMICS OF THE VALVE. WHEN THE PRESSURE DISTURBANCE WAS INTRODUCED IN THE PIPE, THE PNEUMATIC CONSTANT PRESSURE VALVE OSCILLATIONS WERE MEASURED. REPLACING THE EQUATIONS OF THE PIPE-LINE WITH DEAD TIME, THE STABILITY CRITERIA OF THE SYSTEM WAS STUDIED BY NYQUIST METHOD. THE AGREEMENT BETWEEN THEORETICAL AND EXPERIMENTAL RESULTS WAS SATISFACTORY. THE STABLE OSCILLATION OF A GIVEN FREQUENCY AND AMPLITUDE FOR THE NONLINEAR ELEMENT OF COLLISION WITH THE VALVE SEAT OR UPPER STOPPER, WAS ANALYZED BY THE METHOD OF HARMONIC BALANCE. THE SIMULATIONS OF THE BLOCK DIAGRAM OF THE SYSTEM WERE CARRIED OUT ALSO TO CHECK THE VALIDITY OF THE ANALYSIS.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1982-1191
  • Languages: Japanese
  • Source: Refrigeration - vol. 56 - n. 647
  • Publication date: 1981
  • Document available for consultation in the library of the IIR headquarters only.

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