분지관을 전파하는 약한 충격파에 관한 수치해석적 연구

Study of the Shock Wave Propagating through a Branched Pipe Bend

  • 김현섭 (안동대학교 기계공학과 대학원) ;
  • ;
  • 김희동 (안동대학교 기계공학부)
  • 발행 : 2002.08.01

초록

This paper describes the dynamics of the weak shock wave propagating inside some kinds of branched pipe bends. Computations are carried out by solving the two-dimensional, compressible, unsteady Euler Equations. The second-order TVD(Total Variation Diminishing) scheme is employed to discretize the governing equations. For computations, two types of branched pipe($90^{\circ}$ branch,$45^{\circ}$ branch) with a diameter of D are used. The incident normal shock wave is assumed at D upstream of the pipe bend entrance, and its Mach number is changed between 1.1 and 2.4. The flow fields are numerically visualized by using the pressure contours and computed schlieren images. The comparison with the experimental data performed for the purpose of validation of computational work. Reflection and diffraction of the propagating shock wave are clarified. The present computations predicted the experimented flow field with a good accuracy.

키워드