유체기계공업학회:학술대회논문집
- 유체기계공업학회 2006년 제4회 한국유체공학학술대회 논문집
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- Pages.371-374
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- 2006
자유유동 난류강도가 터빈 캐스케이드내 3차원 난류유동 특성에 미치는 영향에 관한 전산해석
Numerical Analysis on Effects of Free-Stream Turbulence Intensity on the Three-dimensional Turbulent Flow Characteristics in a Turbine Cascade
- 발행 : 2006.08.23
초록
The objective of this study is to determine the influence of free-stream turbulent intensity on the three-dimensional turbulent flow in a linear turbine cascade. The range of free-stream turbulence intensity considered is 0.7~10%. This study was performed numerically. The results show that the mass averaged loss coefficient increased according to the increase of free-stream turbulence intensity due to increased value of the mass averaged total pressure loss coefficient which was higher than the decreased value of the mass averaged secondary flow loss coefficient. The loss coefficient distribution was changed suddenly at a free-stream turbulence intensity of 10% while the loss coefficient distribution was rarely changed at a lower free-stream turbulence intensity of 5%.
키워드