Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on The Estimation of Effective Bulk Modulus of Hydraulic Oil With Pressure Variation

압력변동에 따른 유압유의 유효체적탄성계수 측정에 대한 연구

  • 이재천 (계명대학교 기계자동차공학부) ;
  • 정용승 (계명대학교 기계공학 대학원)
  • Published : 2003.01.01
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Abstract

It has been recognized that the compressibility of hydraulic fluid, which is characterized by the value of its bulk modulus, heavily affects on the system behavior and performance. In practice, the value of the oil bulk modulus varies by the operational and structural characteristics of the hydraulic system. This study presents the theoretical derivation of the effective bulk modulus and describes an experimental impulse technique that allows accurate measurement of oil effective bulk modulus with pressure variation in a hydraulic system. Experimental and analytical results show that the value of the effective bulk modulus varies a lot in low pressure region by the effect of entrained air, while the effective bulk modulus can be estimated just using the oil and container bulk modulus on the other high pressure region.

Keywords

References

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