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Çѱ¹¼öÀÚ¿øÇÐȸ / v.37, no.7, 2004³â, pp.527-540
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»çÇà¼ö·Î¿¡¼ È帧 Ư¼º¿¡ °üÇÑ ½ÇÇèÀû ¿¬±¸
( Experimental Study on Flow Characteristics in Meandering Channel ) |
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| ´ÙÁß ¸¸°îºÎ¿¡¼ÀÇ ÁÖÈ帧°ú ÀÌÂ÷·ùÀÇ È帧 Ư¼ºÀ» ºÐ¼®Çϱâ À§ÇÏ¿© Á߽ɰ¢ 120$^{circ}$ÀÎ µÎ °³ÀÇ ¸¸°îºÎ·Î ÀÌ·ç¾îÁø »çÇà¼ö·Î¿¡¼ ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÇÇè¼ö·ÎÀÇ È¾´Ü¸éÀº Á÷»ç°¢Çü°ú °î¼±Çü µÎ °¡Áö ÇüÅ·ΠÁ¦ÀÛÇÏ¿´À¸¸ç, °î¼±Çü ´Ü¸é Çü»ó °áÁ¤¿¡´Â º£Å¸ÇÔ¼ö¸¦ ÀÌ¿ëÇÏ¿´´Ù. 3Â÷¿ø À¯¼ÓÀåÀÇ ÃøÁ¤Àº micro-ADV¸¦ ÀÌ¿ëÇÏ¿´´Ù. ½ÇÇè°á°ú, Á÷»ç°¢Çü ¼ö·Î¿¡¼ ÁÖÈ帧Àº ¼ö·ÎÀÇ °¡Àå ªÀº °æ·Î¸¦ µû¶ó ¹ß»ýÇÏ¿´À¸¸ç, ÀÌ´Â ±âÁ¸ ¿¬±¸ÀÚµéÀÇ °á°ú¿Í ÀÏÄ¡ÇÑ´Ù. °î¼±Çü ¼ö·Î¿¡¼µµ ÁÖÈ帧ÀÌ Á÷»ç°¢Çü ¼ö·Î¿¡¼ÀÇ ÁÖÈ帧ÀÇ °Åµ¿°ú ºñ½ÁÇÑ ¾ç»óÀ» º¸ÀÌ´Â °ÍÀ¸·Î ¹àÇôÁ³´Ù. °î¼±Çü ¼ö·Î¿¡¼ÀÇ ½ÇÇè°á°ú°¡ ½ÇÁ¦ ÀÚ¿¬ÇÏõÀÇ ¸¸°îºÎ¿¡¼ÀÇ ÁÖÈ帧 °Åµ¿(Ãֽɼ±À» µû¶ó ¹ß»ý)°ú »óÀÌÇÏ°Ô ³ªÅ¸³ª´Â ÀÌÀ¯´Â ½ÇÇè¼ö·ÎÀÇ ¹Ù´Ú Á¶µµ¿Í »çÇ൵¿¡ ±âÀÎÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù. ÀÌÂ÷·ùÀÇ Á¤·®ÀûÀÎ ºÐ¼®À» À§ÇÏ¿© È帧ÇÔ¼ö¸¦ µµÀÔÇÑ °á°ú, ¸¸°îºÎ¿¡¼ ÁÖ ¼¿ »Ó¸¸ ¾Æ´Ï¶ó ¹Ù±ùÁ¦¹æ ¼¿ÀÇ À§Ä¡ ¹× ÇüŸ¦ È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ ÀÌÂ÷·ù °µµ¸¦ °è»êÇÑ °á°ú, Á÷»ç°¢Çü ¹× °î¼±Çü ¼ö·Î¿¡¼ ÃÖ´ë°ªÀº µÎ ¹øÂ° ¸¸°îºÎÀÇ Á¤Á¡ ºÎ±Ù¿¡¼ °¡Àå Å©°Ô ³ªÅ¸³ª¸ç °î¼±Çü ¼ö·ÎÀÇ ÀÌÂ÷·ùÀÇ °µµ°¡ Á÷»ç°¢Çü ¼ö·ÎÀÇ °ªº¸´Ù Å©°Ô ³ªÅ¸³ª°í ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù. Á÷»ç°¢Çü ¼ö·ÎÀÇ °æ¿ì, ÇÏÆø ´ë ¼ö½Éºñ°¡ Ä¿Áú¼ö·Ï ÀÌÂ÷·ùÀÇ °µµ°¡ Áõ°¡Çϰí ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù. |
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| In order to investigate characteristics of the primary flow and the secondary currents in the meandering channel, laboratory experiments were conducted in the meandering channel made up of alterative bends haying 120¡£ arc angle. Experiments were performed in two types of cross-sections, a rectangular cross-section and a curved cross-section which was made to adopt a beta probability function. Three-dimensional velocity fields were measured using a micro-ADV. As the result of experiments, in case of the rectangular cross-section, the primary flow occurred taking the shortest course, which is similar to the result of previous researches. In case of the curved cross-section, the primary flow was expected to occur along the thalweg. but it occurred almost along the shortest way. This is considered due to effects of bottom roughness and sinuosity Not only a main cell but also a secondary cell of secondary currents were clearly shown by mean of the stream function. The secondary current intensity has the maximum value near the apex of the second bend for cases of both rectangular and curved cross-sections. However, the value of the secondary current intensity for the curved section is slightly larger than that for the rectangular cross-section. Also, in case of the rectangular cross-section, the higher the ratio of width to depth is, the larger the secondary current intensity is. |
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| Ű¿öµå |
| È帧 Ư¼º;»çÇà¼ö·Î;½ÇÇè½Ç ½ÇÇè;ÀÌÂ÷·ù °µµ;Flow Characteristics;Meandering Channel;Laboratory Experiments;Secondary Current Intensity; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.37, no.7, 2004³â, pp.527-540
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922379216)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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