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Çѱ¹¼öÀÚ¿øÇÐȸ / v.27, no.3, 1994³â, pp.95-105
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¼öÁ÷¼ö¹®ÇÏÀÇ °æ°èÃþÈ帧
( Boundary Layer Flow Under a Sluice Gate ) |
| ÀÌÁ¤¿; Çѱ¹Çؾ翬±¸¼Ò ÇØ¾ç°øÇבּ¸ºÎ(Coastal Engineering Laboratory, Korea Ocean Research and Development Institute, Ansan P.O. Box 29, 425-600, Korea);
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| ¼öÁ÷¼ö¹®ÇÏÀÇ °æ°èÃþ È帧(boundary layer flow)ÀÌ °æ°è°íÁ¤ÁÂÇ¥°è(Boundary- Fitted Coordinate System)¿¡¼ ¹«ÀÛÀ§ ¼Ò¿ëµ¹ÀÌ ÆÇ ¹æ¹ý(Random Vortex Sheet Method)°ú ¿ä¼Ò³» ¼Ò¿ëµ¹ÀÌ ¹æ¹ý(Vortex-in-Cell Method)À» ÀÌ¿ëÇÏ¿© ¼öÄ¡°è»êµÇ¾ú´Ù. ¼öÄ¡ÇØ¿¡ ÀÇÇÑ ¼ö¹®À» µû¶ó Çü¼ºµÈ °æ°èÃþÀÌ ¼öÃà·üÀÇ ½ÇÇèÀÚ·á¿Í ºñÁ¡¼ºÀ̷п¡ ÀÇÇÑ ±× °á°úÀÇ Â÷À̸¦ À¯¹ßÇÏ´Â ÁÖ¿øÀÎÀÎ °ÍÀ¸·Î º¸¿©Áø´Ù. ±× µ¿¾È ÁÖ¿øÀÎÀÏ °ÍÀ¸·Î ¹Ï¾î¿Ô´ø ¹Ù´Ú¸é °æ°ÔÃþÀÇ ¿ªÇÒÀº ¼ö¹®¸éÀÇ ±× °Íº¸´Ù´Â ÀûÀº °ÍÀ¸·Î ¼öÄ¡°è»êµÇ¾ú´Ù. ¶ÇÇÑ Â÷¿øÇؼ®À» ÅëÇÏ¿© °æ°èÃþ È帧¿¡ ÀÇÇÑ ¼öÃàÀ²ÀÇ ±× Â÷À̰¡ ¼ö¹® ±æÀÌÀÇ Æò¹æ±Ù¿¡ ¹Ýºñ·ÊÇÏ´Â °ÍÀ¸·Î ÃßÁ¤µÇ¾úÀ¸¸ç, ÀÌ´Â Benjamin(1956)¿¡ ÀÇÇÏ¿© ºÐ¼®µÈ °Í°ú °á±¹ µ¿ÀÏÇÑ °ÍÀÓÀÌ ¹àÇôÁ³´Ù. ¼öÄ¡¸ðµ¨°ú Â÷¿øÇؼ®¿¡ µû¸¥ °á°ú´Â Benjamin(1956)¿¡ ÀÇÇØ ¾ò¾îÁø ¼öÃà·üÀÇ ½ÇÇã¹Ì¿Í ºñ±³ÇÏ¿© ¸¸Á·ÇÒ ¸¸ÇÏ¿´´Ù. |
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| The boundary layer flow under a sluice gate is numerically solved by the random vortex sheet method combined with the vortex-in-cell method in a boundary-fitted coordinate system. The numerical solution shows that the boundary layer developed along the vertical sluice gate wall is the primary cause for the discrepancy in the contraction ratio between the laboratory experiments and inviscid theory; the bottom boundary layer plays much a smaller role in the discrepancy. By dimensional analysis it is concluded that the discrepancy is inversely proportional to the 3/4th power of the gate opening, as analyzed by Benjamin(1956). The results of the numerical simulation and dimensional analysis show a good agreement with experimental results obtained by Benjamin(1956). |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.27, no.3, 1994³â, pp.95-105
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199411920095060)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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