Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Performance Characteristics of a V-type Probe Developed for Wall Vorticity Measurement

벽와도 측정을 위하여 개발된 V형 열선 프로브의 성능특성

  • Kim, Seong-Uk (Dept.of Mechanical Aerospace Engineering, Graduate School of Seoul National University) ;
  • Ryu, Sang-Jin (Dept.of Mechanical Aerospace Engineering, Graduate School of Seoul National University) ;
  • Yu, Jeong-Yeol
  • Published : 2001.04.01
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Abstract

In order to investigate the relation between wall vorticity and streamwise velocity fluctuations in a turbulent boundary layer, a wall vorticity probe has been developed, which consists of two hot-wires on the wall aligned in V configuration. Although the measured intensity of spanwise wall vorticity fluctuations is somewhat lower than previous results, the intensity of streamwise wall vorticity fluctuations is in good agreement with them. It has been shown that the measured intensity of spanwise wall vorticity fluctuations is affected by transverse length of the wall vorticity probe. Instantaneous streamwise and spanwise wall vorticity fluctuations are compared with the results of DNS. Probability density function of spanwise wall vorticity fluctuations shows good agreement with previous results and is different from that of streamwise wall vorticity fluctuations. Energy spectrum of streamwisw wall vorticity fluctuations is lower than that of spanwise wall vorticity fluctuations in low frequency region.

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References

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