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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.4, 1995³â, pp.147-154
ÀÚÀ¯³«Çϼö¸Æ ÇÏ·ùºÎ¿¡¼­ÀÇ ¼¼±¼¿¡ °üÇÑ ½ÇÇèÀû ¿¬±¸
( Experimental Study on Downstream Local Scour of Free-Falling Jet )
À±¼¼ÀÇ;ÀÌÁ¾ÅÂ; °æ±â´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¿µ³²´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú Á¶±³¼ö, ³ó¾îÃÌÁøÈï°ø»ç °æ±âÁö»ç Á¶»ç¼³°èºÎ;
 
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º» ¿¬±¸¿¡¼­´Â Ưº°ÇÑ ¿¡³ÊÁö °¨¼¼¸¦ À§ÇÑ ¼ö°ø±¸Á¶¹°ÀÌ ¼³Ä¡µÇÁö ¾ÊÀº Áß ¼Ò±Ô¸ð ´Ü¶ôºÎ ÇÏ·ùºÎ¿¡¼­ ÀÚÀ¯³«ÇÏÇÏ´Â ¼ö¸ÆÀ¸·Î ÀÎÇÏ¿© ¹ß»ýµÇ´Â ºñÁ¡Âø¼º ÇÏ»óÀç·áÀÇ ¼¼±¼Æ¯¼ºÀ» ¼ö¸®¸ðÇü½ÇÇèÀ» ÅëÇÏ¿© ºÐ¼®ÇÏ¿´´Ù. ´Ü¶ô¼ö¸Æ ÇÏ·ùºÎ¿¡¼­ÀÇ ¼¼±¼Æ¯¼ºÀ» ºÐ¼®Çϱâ À§ÇÏ¿© ¸ÕÀú Á÷»ç°¢Çü ´Ü¶ô¼ö¸ÆÀÇ È帧Ư¼ºÀ» Á¶»çÇÏ¿´À¸¸ç, ÇÏ»óÀç·á, À¯·®, ÇÏ·ù¼ö½ÉÀ» º¯È­½ÃŰ¸é¼­ ¼¼±¼°øÀÇ Á÷ÇÏ·ùºÎ¿¡ »ý¼ºµÇ´Â µÐ´ö(mound)ÀÇ À¯¹«·Î ÀÎÇÑ ¼¼±¼Æ¯¼ºÀ» ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ÆòÇü¼¼±¼½É »Ó¸¸ ¾Æ´Ï¶ó µÐ´öÀÇ ³ôÀ̵µ ¹Ðµµ Èĸ£µå¼öÀÇ ÇÔ¼ö·Î Ç¥½ÃµÇ¸ç, ¹Ðµµ Èĸ£µå¼ö´Â ´Ù¸¥ ¹«Â÷¿ø·® º¸´Ù ÆòÇü¼¼±¼½É°ú ºñ±³Àû ±íÀº °ü°è°¡ ÀÖ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù. ´Ü¶ôºÎ ÇÏ·ùºÎ ÇÏ»ó º¸È£°øÀÇ ¼³°è½Ã µÐ´öÀÇ ¿µÇâÀ» °í·ÁÇØ¾ß ÇÑ´Ù´Â °á·ÐÀ» ¾ò¾ú´Ù.
Scour characteristics of noncohesive bed materials at the downstream of free-falling jet were analyzed through hydraulic experiments. It was assumed that the downstream had no special energy dissipators. Flow characteristics of free falling jet from rectangular section were studied, and scour characteristics with and without mounds, which were generated at the downstream of the scour hole, were comparatively analyzed for various bed materials, discharges and tailwater depths. Not only the equilibrium scour depth but also the height of mound could be expressed as a function of densimetric Froude number. Densimetric Froude number had closer relationship with the equilibrium dimensionless scour depth than other dimensionless parameters. It was suggested that the mound effects should be considered at the design stage of bed protection works.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.4, 1995³â, pp.147-154
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920095979)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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