Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Improvement of the Aerothermal Environment for a 90° Turning Duct by the Nonaxisymmetric Endwall

90° 곡관에서의 비축대칭 끝벽면을 이용한 열유동 환경 개선

  • 조종재 (부산대학교 항공우주공학과) ;
  • 김귀순 (부산대학교 항공우주공학과)
  • Received : 2011.06.17
  • Accepted : 2011.07.11
  • Published : 2011.08.30
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Abstract

This paper presents the shape optimization of the endwall which improve the aerothermal environment of a gas turbine passage. A nonaxisymmetric endwall technique was adapted as the improving method. The turbine passage was simulated by a $90^{\circ}$ turning duct ($Re_D$=360,000). The main purpose of the present investigation was to focus on finding a nonaxisymmetric endwall with minimum total pressure loss in the passage and heat transfer coefficient on the endwall of the duct. An approximate optimization method was used for the investigation to secure the computational efficiency. Results indicated that a significant improvement in aerothermal environment can be achieved through the application of a nonaxisymmetric endwall.

본 논문에서는 가스터빈 유로의 열유동 환경을 개선하기 위해 끝벽면의 형상에 대한 최적화를 수행하였으며, 비축대칭 끝벽면을 이용한 방법을 적용하였다. 터빈 유로를 모사하기 위해 $90^{\circ}$ 곡관을 이용하였다. 터빈 유로에서의 전압력 손실과 유로 끝벽면에서의 열전달 계수를 최소화하는 비축대칭 끝벽면형상 도출을 연구의 목적으로 하였으며, 최적화 과정의 효율성을 위해 근사 최적화 기법을 적용하였다. 연구결과를 통해, 최적화된 비축대칭 끝벽면에 의한 상당한 공력열환경 개선을 확인할 수 있었다.

Keywords

References

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