A Study on Simultaneous Analysis of Velocity and Density Distributions for High-Speed $CO_{2}$ Flow

고속 이산화탄소 유동장의 속도 및 밀도 동시 분석에 관한 연구

  • 김용재 (성균관대학교 기계설계학과 대학원) ;
  • 고한서 (성균관대학교 기계공학부) ;
  • Published : 2005.12.01


Velocity and density distributions of a high-speed and initial $CO_{2}$ jet flow have been analyzed simultaneously by a developed three-dimensional digital speckle tomography and a particle image velocimetry(PIV). Three high-speed cameras have been used for tomography and PIV since a shape of a nozzle for the jet flow is asymmetric and the initial flow is fast and unsteady, The speckle movements between no flow and $CO_{2}$ jet flow have been obtained by a cross-correlation tracking method so that those distances can be transferred to deflection angles of laser rays for density gradients. The three-dimensional density fields for the high-speed $CO_{2}$ jet flow have been reconstructed from the deflection angles by a real-time tomography method and the two-dimensional velocity fields have been calculated by a PIV method simultaneously and instantaneously.