벽와도 측정을 위하여 개발된 V형 열선 프로브의 성능특성

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김성욱;류상진;유정열
Kim, Seong-Uk;Ryu, Sang-Jin;Yu, Jeong-Yeol

  • 발행 : 2001.04.01

초록

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.

키워드

벽와도 섭동;벽면부착열선;V형 벽와도 프로브

참고문헌

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