H. S. Rew

LG Electronics, Sŏul, Seoul, South Korea

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Publications (4)6.6 Total impact

  • Source
    H. S. Rew, S. O. Park
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    ABSTRACT: A curved wall jet before the interaction of two identical curved wall jets over a circular cylinder was investigated experimentally. Using hot-wire anemometry, the mean velocity, Reynolds stresses, and high order moments of the fluctuating velocity were measured. The turbulent kinetic energy and shear stress budgets were evaluated using the measured data. The correlation coefficient, [`(uv)] \mathord/ \vphantom [`(uv)] u¢v¢ u¢v¢{{\overline {uv} } \mathord{\left/ {\vphantom {{\overline {uv} } {u'v'}}} \right. \kern-\nulldelimiterspace} {u'v'}} , the normal stress ratio, [`(v2 )] \mathord/ \vphantom [`(v2 )] [`(u2 )] [`(u2 )] {{\overline {v^2 } } \mathord{\left/ {\vphantom {{\overline {v^2 } } {\overline {u^2 } }}} \right. \kern-\nulldelimiterspace} {\overline {u^2 } }} , and the principal direction of the Reynolds stress are presented. The effects of curvature and adverse pressure gradient on these diistributions are also discurssed. The turbulent kinetic energy and shear stress budgets in two regions before the interaction are analyzed in detail to illuminate the effect of the adverse pressure gradient on the turbulent transport.
    Journal of Mechanical Science and Technology 02/1996; 10(1):86-93. DOI:10.1007/BF02953947 · 0.70 Impact Factor
  • Source
    S.O. Park, H.S. Rew
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    ABSTRACT: Various Reynolds stress budgets in an outwash jet resulting from the collision of two curved wall jets are experimentally investigated. The outwash jet is initially accelerating until the two detached jets become fully merged. Later, the merged jet develops to obtain similarity. The Reynolds stress budgets in the interacting region (where the jet is accelerating) and those in the similar region have been carefully evaluated on the basis of measurements with hot-wire anemometry. The reported budgets include the kinetic energy budget, the longitudinal normal stress budget, the lateral normal stress budget, and the shear stress budget, which are rarely found elsewhere.
    Experimental Thermal and Fluid Science 05/1992; 5(3):325–331. DOI:10.1016/0894-1777(92)90077-I · 2.08 Impact Factor
  • Source
    S. O. Park, H. S. Rew
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    ABSTRACT: A two-dimensional flow generated by the interaction of two opposing, symmetric curved wall jets is investigated experimentally. The overall flow field can be divided into the curved wall jet region, the interaction region, and the merged jet region; thus, the results of the measurement are discussed to characterize these three distinct regions. For the curved wall jet region, the Reynolds stress distribution, the correlation coefficient, [`(uv)] /u¢v¢\overline {uv} /u'v' , and the ratio of normal stresses, [`(u2 )] /[`(u2 )]\overline {u^2 } /\overline {u^2 } , are presented and the effects of curvature and adverse pressure gradient on these distributions are discussed. The Reynolds stress distributions in the interaction region are analyzed in detail to illuminate the negative production of the turbulent kinetic energy. The developing jet in this region is found to accelerate owing to the very high pressure arising from the collision of the two wall jets. A counter-gradient shear flow situation is also observed in this interacting region. Measured data in the merged jet region are often compared to those of plane jets and the development of the merged jet is discussed in that respect. The spreading rate of the present merged jet is found to be much larger than that of the plane jets. To account for the larger spreading rate, the intermittency distribution is also investigated.
    Experiments in Fluids 01/1991; 10(5):241-250. DOI:10.1007/BF00202456 · 1.91 Impact Factor
  • Source
    H. S. Rew, S. O. Park
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    ABSTRACT: An experimental investigation was made of a two dimensional flow formed by the interaction of two asymmetric turbulent curved wall jets past a circular cylinder. Measurements were made of velocity and turbulence intensity profiles of the two curved wall jets before the interaction, and those of the merged jet after the interaction. The location of the interaction region of the two opposing curved wall jets and the flow direction of the merged jet were found to depend primarily on the ratio of initial momentum fluxes. The velocity and turbulence intensity profiles of the merged jet were similar to those of the plane turbulent jet. However, the growth rate of the merged jet was approximately 1.5 times larger than that of the plane jet. The influence of the momentum flux ratio on the growth rate appeared to be insignificant.
    Experiments in Fluids 12/1987; 6(4):243-252. DOI:10.1007/BF00187364 · 1.91 Impact Factor

Publication Stats

20 Citations
6.60 Total Impact Points

Institutions

  • 1996
    • LG Electronics
      Sŏul, Seoul, South Korea
  • 1987–1991
    • Korea Advanced Institute of Science and Technology
      • • Department of Aerospace Engineering
      • • Department of Mechanical Engineering
      Sŏul, Seoul, South Korea