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Innovative hybrid device for the simultaneous damping of pressure pulsations and vibrations in positive displacement compressor manifolds.

Author(s) : MLYNARCZYK P., CYKLIS P., RYNCARZ T.

Type of article: IJR article

Summary

Manifold vibrations in refrigerating compressor manifolds are the result of pressure pulsations as well as compressor-generated mechanical vibrations. In this article, an analysis of a device combining a TMD (tuned mass damper) and a shaped nozzle for pressure pulsation attenuation is presented. The nozzle shape and geometry is determined on the basis of our previous findings using 3D analysis. The nozzle pulsation attenuation is caused by viscous and vorticity energy dissipation. The nozzle is mounted inside the pipe in the chosen position using springs with tuned stiffness. The nozzle mass and spring stiffness create the TMD. The simulation of the TMD damping using the OpenModelica SimulationX package is presented with kinetic energy transfer from a vibrating pipe to the TMD. It transpired that the result on the pressure pulsations damping of the vibrating nozzle is not as high as it is in the case of a nozzle in a fixed position due to the clearance between the nozzle and the pipe that is necessary in the TMD case. Nevertheless, vibrations are more efficiently damped using the combined TMD and nozzle damping action (28%) than a fixed nozzle (13%). This innovation makes it possible to reduce vibration and pressure pulsation using one device, which is especially important for small refrigerating manifolds, where the size of the damping element is important and vibration reduction leads to noise attenuation. The hybrid suppression device is currently patent pending.

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Pages: 109-118

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Details

  • Original title: Innovative hybrid device for the simultaneous damping of pressure pulsations and vibrations in positive displacement compressor manifolds.
  • Record ID : 30029218
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
  • Publication date: 2021/12
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.09.008
  • Document available for consultation in the library of the IIR headquarters only.

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