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Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.3, 1998³â, pp.291-301
¸¸°î¼ö·Î¿¡¼­ ÇÏ»óÀç·á º¯È­¿¡ µû¸¥ È帧°ú Çϻ󺯵¿ Ư¼º¿¡ °üÇÑ ½ÇÇèÀû ¿¬±¸
( An Experimental Study on the characteristics of Flow and Bed Topography with Changing Bed Material in a Curved Channel )
Á¤Àç¿í;À±¼¼ÀÇ; °æ±â´ëÇб³ ´ëÇпø;°æ±â´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â Ä¡¼ö ¹× À̼ö¿¡ À־ Ç×»ó ¾î·Á¿òÀ» °Þ°í ÀÖ´Â °³¼ö·Î ¸¸°î±¸°£¿¡¼­ ÇÏ»óÀç·áÀÇ º¯È­¿¡ µû¸¥ È帧 ¹× Çϻ󺯵¿ Ư¼ºÀ» ºÐ¼®Çϱâ À§ÇÏ¿© Á߽ɰ¢ 180'ÀÎ ¸¸°î¼ö·Î¸¦ Á¦ÀÛÇϰí, ¸ð·¡(D50 = 0.26 MM, S = 1.54)¿Í ¾ÈÆ®¶ó½ÎÀÌÆ®(D50 = 0.26 mm, S = 1.54)¸¦ ÇÏ»óÀç·á·Î ¼±ÅÃÇÏ¿© ½ÇÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ½ÇÇè°á°ú, ÃÖ´ë¼¼±¼½ÉÀº ¸¸°î°¢ 30'-60' ¿ÜÃøÁ¦¹æºÎ±Ù¿¡¼­ Æò±Õ¼ö½ÉÀÇ ¾à 2¹è±îÁö ½ÇÃøµÇ¾úÀ¸¸ç, ÃÖ´ë¼¼±¼½ÉÀÇ ¹ß»ýÀ§Ä¡´Â ¾ÈÆ®¶ó½ÎÀÌÆ®ÀÎ °æ¿ì¿¡ ¸ð·¡¿¡¼­º¸´Ù 5'-15' Á¤µµ »ó·ùºÎ¿¡¼­ °üÃøµÇ¾ú´Ù. Á¾´Ü¸é ÃÖ´ëÀ¯¼Ó¼±Àº ÇÏ»óÀç·á¿Í °ü°è¾øÀÌ ³»Ãø¿¡¼­ ¿ÜÃøÀ¸·Î ÆíÀǵǰí ÀÖÀ¸¸ç, ÇÏ»óÀÌ °ÅÄ¥¼ö·Ï ÇÏ·ù·Î À̵¿ÇÏ¿´´Ù. ÇÏ»óÀÌ ¸Å²ô·¯¿ï¼ö·Ï È帧ÀÇ ÃÖ´ë ÆíÀǰ¢Àº ¸¸°î¼ö·Î »ó·ùºÎ¿¡¼­ ¹ß»ýÇϰí ÀÖÀ¸¸ç, ±× Å©±âµµ Áõ°¡ÇÏ¿´´Ù. ¾ÈÆ®¶ó½ÎÀÌÆ®ÀÇ °æ¿ì°¡ ¸ð·¡ÀÇ °æ¿ìº¸´Ù 2Â÷È帧ÀÌ Å©°Ô ¹ß»ýÇÏ´Â °ÍÀ¸·Î ½ÇÃøµÇ¾úÀ¸¸ç, µÎ°³ÀÇ ÇÙÀÌ Á¸ÀçÇÏ´Â Çö»óÀÌ °üÃøµÇ¾ú´Ù. Çٽɿë¾î : ¸¸°î¼ö·Î, ÇÏ»óÀç·á, ÃÖ´ë¼¼±¼½É, 2Â÷È帧, À¯Çâ, È帧ÀÇ ÆíÀǰ¢
The objective of this study is to analyze the characteristics of flow and bed topography with changing bed material in a 180-degree, with constant-radius curved experimental channel. Sand($D_{50}$ = 0.56 mm, s = 2.65) and anthracite($D_{50}$ = 0.26 mm, s = 1.54) were selected as bed materials. The maximum scour depth was found to be about two times for the mean flow depth at the outer bank of bend angle $30^{circ}~60^{circ}$, and in case of anthracite, it was found upper part of bend angle $5^{circ}~15^{circ}$ than that of sand. Regardless of bed materials the path of maximum streamwise velocity is skewed inwards in the upper part of the bend, the maximum velocity shifts outwards, and it lagged downward as bed roughness increases. The maximum skewed angle of flow grows faster in the smooth bottom than in the rough one, and its value also increases. The secondary flow in anthracite bottom was measured larger than that of sand one, and two cells of secondary flow was found in this experiment.
 
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¸¸°î¼ö·Î;ÇÏ»óÀç·á;ÃÖ´ë¼¼±¼½É;2Â÷È帧;À¯Çâ;È帧ÀÇ ÆíÀǰ¢;curved channel;bed material;maximum scour depth;secondary flow;the skewed angle of the flow;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.3, 1998³â, pp.291-301
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920100985)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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