Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Temperature Variations of Air Pocket in Type-3 Composite Vessel during Ambient Hydraulic Cycling Test

상온 수압반복시험 시 Type 3 복합재용기 내 공기층의 온도변화

  • Cho, Sung-min (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Kwang Seok (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Chang Jong (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lyu, Geun-jun (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lee, Yeon-jae (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Jo, Yun Seong (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lyu, Sung-Ki (School of Mechanical & Aerospace Eng., ReCAPT, Gyeongsang National Univ.)
  • 조성민 (한국가스안전공사 가스안전연구원) ;
  • 김광석 (한국가스안전공사 가스안전연구원) ;
  • 김창종 (한국가스안전공사 가스안전연구원) ;
  • 유근준 (한국가스안전공사 가스안전연구원) ;
  • 이연재 (한국가스안전공사 가스안전연구원) ;
  • 조윤성 (한국가스안전공사 가스안전연구원) ;
  • 류성기 (경상대학교 기계항공학부(ReCAPT))
  • Received : 2015.08.19
  • Accepted : 2015.09.05
  • Published : 2015.10.31
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Abstract

This research aims to increase the reliability and reproducibility of the ambient cycling test by properly making corrections to the test procedure. The vessel (106 L) is initially filled with 70 L of water and horizontally placed on a balance. The pressure range inside the vessel varies from 2.5 to 25.9 MPa at the frequency of 6 cycles per minute. After reviewing the results, there was a temperature difference of approximately $10^{\circ}C$ between the air pocket and the water, and the upper part of the liner faced a repeated temperature change of $40^{\circ}C$. It is possible for the aluminum liner of the composite vessel to be damaged by such a sharp change in temperature. Additionally, as a result, no pass having anything to do with the purpose of the test would occur. Therefore, it is suggested that the air pocket be completely removed.

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References

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