Dynamic Analysis of Free-Piston Vuilleumier Cycle Heat Pumps with Frictional Dissipation.
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概要
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A dynamic analysis of free-piston Vuilleumier cycle heat pumps with friction force due to seals has been carried out by a time-stepping integration technique. This technique allows application of a discontinuous damping force caused by friction to the equations of motion for reciprocating components. Some calculations for a case study were performed taking into consideration the frictional dissipation in addition to the viscous dissipation due to oscillating flow of working gas. The dissipative work due to the friction force had a large influence on the amplitudes of a hot and a cold displacer piston and their phase difference, and had small influence on natural frequency. A mechanism to determine the amplitudes was explained based on the energy balance between the rod and dissipative works. It was found that a rod seal plays an important role in the determination of the dynamic behaviors especially in the phase difference, and the present prediction method was very effective for the free-piston Vuilleumier cycle heat pumps with frictional dissipation.
- 一般社団法人 日本機械学会の論文
一般社団法人 日本機械学会 | 論文
- PREFACE
- Hybrid Vibration Suppression of Flexible Structures Using Piezoelectric Elements and Analog Circuits
- Application of Momentum Exchange Impact Dampers to Forging Machine
- アルミニウム繊維層を設置した流路の熱伝達と圧力損失特性
- 地震荷重下における配管のき裂進展評価手法の提案