Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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A Study on CFD Performance of Jet Fan Nozzle with Deformation

제트팬 노즐형상의 변형에 따른 CFD 성능 검토

  • 권혁민 (영남대학교 일반대학원 건축학과) ;
  • 양정훈 (영남대학교 건축학부)
  • Received : 2017.02.15
  • Accepted : 2017.05.03
  • Published : 2017.05.30
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Abstract

Individuals' vehicle purchase rates throughout the world have recently been increasing greatly each year due to their incomes increasing along with industrial development. However, people are now faced with difficulties in securing parking spaces because of the increasing amount vehicles, this is not only in Korea but also in other countries. In order to resolve this problem, each country is increasing the ratio of underground parking lots for the purpose of securing parking spaces. In Korea, many ventilation systems with small jet fans are installed in underground parking lots nowadays. In the case of the jet fan ventilation system, research is currently being conducted on the actual arrangement of jet fans and the number of jet fans required to be installed. It is also necessary to conduct research on how to enhance the performance of the small jet fans. Grasping the airflow characteristics of each jet fan is required for understanding its ventilation area. This can be utilized as basic data which may determine the arrangement of jet fans as well as the number of jet fans to be installed in an underground parking lot. In existing studies, research has been conducted by utilizing the jet theory. This study, however, experiments on and comparatively analyzes the various characteristics of jet streams which are generated as a result of the installation of jet fans through the CFD analysis based on the expectation that there may be differences in such spaces as real underground parking lots. This study is mainly focused on deducing a modeling technique and an analysis equation, both of which are close to reality while simplifying the models during the CFD analysis of the proposed alternatives by means of 3D printing. In accordance to the basic case model and CFD simulation benchmark test results, the k-epsilon Realizable model was discovered to be the most similar to reality. In addition, according to the results of the CFD analysis of Case1(Inside guide type), Case2(Outside guide type) and Case3(Outside spread type) proposed in this study. Case1(Inside guide type) was discovered to be the most accurate among them, likewise as shown in the experiment results, and thus it can be seen that the obtained values were found to be quite similar to the experimental values.

Keywords

Acknowledgement

Supported by : 한국연구재단

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