# PIV를 이용한 범포 주위의 유동장 특성

• Published : 2006.05.31
• 75 22

#### Abstract

This research aims at establishing the fundamental characteristics of the kite through the analysis of the flow field around various types of kites. The approach of this study were adopted for the analysis; visualization by PIV(particle image velocimetry). Also, the lift and drag tests of kites had been performed in our previous finding(Bae et al., 2004a; Bae et al., 2004b). For this situation, models of canvas kite were deployed in the circulating water channel for the PIV test using the same conditions as in the lift and drag tests. The results obtained from the above approach are summarized as follows: Given the rectangular and triangular kites when attack angle is $20^{\circ}$, vortex by the boundary layer separation was seen in the leading edge and the flow towards the trailing edge was more turbulent. But, the inverted triangular type kite was seen to be stable without any boundary layer separation or turbulence. The increase of the attack angle resulted in the eddy in order of the rectangular, triangular and inverted triangular type. The magnitude of the eddy followed the same order. The effect of edge-eddy was biggest in the triangular type followed by the rectangular and then the inverted triangular type. The kite as the buoyancy device or the opening device will be very useful when the appropriate applications and the stability are met.

#### Keywords

Canvas kite;PIV system;Visualization;Circulating water channel

#### References

1. An, H.C., 2000. Development and hydrodynamic characteristics of sea anchor for squid jigging vessel. Ph.D. thesis, Pukyong National university, Korea, 41-43
2. Bae, B.S., J.H. Bae, H.C. An, J.H. Lee and J.W. Shin, 2004a. The hydrodynamic characteristics of the canvas kite. 1. The characteristics of the rectangular, trapezoid canvas kite. Bull. Kor. Fish. Tech. Soc., 40(3), 196 - 205 https://doi.org/10.3796/KSFT.2004.40.3.196
3. Bae, B.S., J.H. Bae, H.C. An, J.H. Lee and J.W. Shin, 2004b. The hydrodynamic characteristics of the canvas kite. 2. The characteristics of the triangular canvas kite. Bull. Kor. Fish. Tech. Soc., 40(3), 206 - 213 https://doi.org/10.3796/KSFT.2004.40.3.206
4. Edwards, M.L., 1987. Want more headline height and less drag? Go fly a kite. NATL. - FISHERMAN, 68(8), 38 - 41
5. Jang, J.W and D.O. Seo, 1982. Fishing gear engineering. Sinhan publication, 112 - 114
6. Lange, K., 1989. Design and operation of flexible sail kites. ICES council meeting collected papers, 7p
7. Lee, S.J., 1999. PIV Velocity field measurement. Lecture note of after short course. Pohang University of Science and Technology, 11 - 69, 107 - 141, 249 292
8. Lee, S.K., 2002. Wing theory. Wooyong publication, 32 -113
9. Lee, Y.H. and J.W. Choi, 1996. Principle and classification of PIV. KSME(B), 36(12), 1146-1162
10. Park, K.H., 2003. A study on the hydrodynamic characteristics of the two slot cambered otter board. Ph.D. thesis, Pukyong National university, Korea, 66 -72
11. Park, K.H., J.H. Lee, B.S. Hyun and J.H. Bae, 2001. The study on the hydrodynamic characteristics of the single slot cambered otter board. Bull. Kor. Fish. Tech. Soc., 37(1), 1-8
12. Kwon, B.G., 1993. A study on the hydrodynamic characteristics of otter board. Ph.D. thesis, National Fisheries university of Pusan, Korea, 31 - 48
13. Park, K.H., J.H. Lee, B.S. Hyun, Y.H. Ro and J.H. Bae, 2002. Study on the measurement of flow filed around cambered otter board using particle image velocimetry. Bull. Kor. Fish. Tech. Soc., 38(1), 43-57 https://doi.org/10.3796/KSFT.2002.38.1.043
14. Liu, Z.C., C.C. Landreth, RJ. Adrian and T.J. Hanratty, 1991. High resolution measurement of turbulent structure in a channel with particle image velocimetry. Experiments in fluids, vol. 10, 301-312 https://doi.org/10.1007/BF00190246
15. Hoerner, S.F., 1975. Fluid dynamic lift, Chapter 5, 18
16. Catasta, L., 1959. Studies to improve the efficiency of otter boards and trawl floats. Modern fishing gear of the world, 251 - 253
17. Hynn, B.S., R. Balachandar, K. Yu & V.C. Patel, 2003. Assessment of PIV to measure mean velocity and turbulence in open - channel flow. Experiments in fluids, 35(3), 262 - 267 https://doi.org/10.1007/s00348-003-0652-7

#### Cited by

1. Measurement of turbulence intensity of cage net using the particle imaging velocimetry vol.50, pp.4, 2014, https://doi.org/10.3796/KSFT.2014.50.4.595
2. Analysis of the hydrodynamic characteristics of chain-link woven copper alloy nets for fish cages vol.56, 2013, https://doi.org/10.1016/j.aquaeng.2013.05.002
3. Analysis of Current Distribution around a Scaled-down Abalone System to determine the cause of mass mortality of abalone, Haliotis discus hannai (Ino, 1952) vol.30, pp.1, 2014, https://doi.org/10.9710/kjm.2014.30.1.9
4. Measurement of swimming ability of silver fish (Plecoglossus altivelis) using a Particle Imaging Velocimetry vol.47, pp.4, 2011, https://doi.org/10.3796/KSFT.2011.47.4.411
5. An advanced study of multi-stage type hydrocyclone dust collector for fish egg collecting using Visualization vol.53, pp.4, 2017, https://doi.org/10.3796/KSFT.2017.53.4.404