화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.6, 831-837, October, 2003
Export Citation
가압유동층에서 기체-고체의 Chaotic 흐름 거동 해석
Analysis of Chaotic Flow Behavior of Gas-solid in a Pressurized Fluidized Bed
강석환, 강용†, 한근희1, 진경태1
  • 충남대학교 화학공학부, 대전 305-764
  • 1한국에너지기술연구소 청정에너지연구부
Suck-Hwan Kang, Yong Kang†, Kun-Hee Han1, and Gyoung-Tae Jin1
  • School of Chemical Engineering, Chungnam National University, Daejeon 305-764, Korea
  • 1Clean Energy Research Department, KIER, Korea
E-mail:
초록
최소유동화속도 부근의 가압유동층에서 기체-고체의 흐름 거동을 chaos이론을 도입하여 연구하였다. 압력 변동을 계를 해석하기 위한 상태 변수로 사용하였으며, 유동층에서 기체와 고체의 불규칙적이고 chaotic 흐름에 기인된 압력변동 신호는 상공간투영, kolmogorov 엔트로피 그리고 상관차원과 같은 chaos 파라메타들에 의해 해석하였다. 기체-고체 가압유동층에서 기체-고체 흐름의 비선형적 거동을 묘사하고 설명하는데 chaos 파라메타들은 효과적으로 사용될 수 있었다. 또한, 이들 chaos 파라메타들은 복잡한 기체-고체 흐름에 기인하여 발생하는 동역학적 거동의 정량적인 정보를 제공할 수 있었다. 본 연구의 실험범위에서 압력요동의 kolmogorov 엔트로피와 상관차원의 값들은 실험변수들과 좋은 상관관계를 나타내었다.
In a pressurized fluidized bed, chaotic flow behavior of gas-solid in the vicinity of minimum fluidization velocity condition has been investigated by adopting the concept of chaos theory. Pressure fluctuation has been chosen as a state variable for the analysis of the system. The pressure fluctuation signals due to the irregular and chaotic flow of gas and solid, in the bed, have been interpreted by means of chaotic parameters such as phase space portraits, Kolmogorov entropy and correlation dimension. It was found that the chaotic parameters can be utilized effectively to describe and explain the non-linear dynamic behaviors of gas-solid flow in a pressurized gas-solid fluidized bed. Also, they can provide quantitative measures of dynamic behavior arising from the complex gas-solid flow. The values of Kolmogorov entropy and correlation dimension of pressure fluctuations have been well correlated with operating variables within experimental conditions.
Keywords:gas-solid;pressurized fluidized bed;pressure fluctuations;chaos analysis
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