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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.5, 2010³â, pp.445-453
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( An Experimental Study for Estimation of Head Loss Coefficients at Surcharged Combining Junction Manholes ) |
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µµ½Ã ¿ì¼ö ¹è¼ö ½Ã½ºÅÛ¿¡¼ ¿ì¼ö °ü°Å´Â °³¼ö·Î È帧 »óÅ·Π°¡Á¤ÇÏ¿© ¼³°èµÇ¾ú±â ¶§¹®¿¡ ÇÕ·ù¸ÇȦ¿¡¼ÀÇ ¿¡³ÊÁö ¼Õ½ÇÀº ÀϹÝÀûÀ¸·Î Áß¿äÇÏ°Ô °í·ÁµÇÁö ¾Ê¾Ò´Ù. ±×·¯³ª °úºÎÇÏÈ帧¿¡¼ ¿¡³ÊÁö ¼Õ½ÇÀº °ü°ÅÀÇ ¹è¼ö´É·ÂÀ» ÀúÇϽÃÄÑ µµ½ÉÁö¿ªÀÇ Ä§¼öÇÇÇØ¸¦ °¡Áß½ÃŰ´Â ¿äÀÎÀÌ µÈ´Ù. ±×·¯¹Ç·Î °úºÎÇÏ ÇÕ·ù¸ÇȦ ³»¿¡¼ÀÇ ¼öµÎ ¼Õ½ÇÀ» ºÐ¼®ÇÒ Çʿ䰡 ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ÇÕ·ù¸ÇȦ¿¡ ´ëÇÑ ¹®ÇåÁ¶»ç ¹× ÇöÀåÁ¶»ç¸¦ ½Ç½ÃÇÏ¿© ½ÇÇèÀåÄ¡¸¦ Á¦ÀÛÇÏ°í ½ÇÇèÁ¶°ÇÀ» ¼±Á¤ÇÏ¿´´Ù. ¼±Á¤µÈ ½ÇÇèÁ¶°ÇÀÎ ¸ÇȦ Çü»ó Á¶°Ç(»ç°¢Çü, ¿øÇü), À¯ÃâÀ¯·®($Q_3$)¿¡ ´ëÇÑ Ãø¸éÀ¯ÀÔÀ¯·®($Q_2$)ÀÇ ºñ($Q_2/Q_3$) ¹× ½ÇÇè À¯·®(2.0, 3.0, $4.0{ell}$/sec)À» º¯È½ÃŰ¸é¼ ½ÇÇèÀ» ½Ç½ÃÇÏ¿´´Ù. $Q_2/Q_3$°¡ Áõ°¡ÇÒ¼ö·Ï ¼Õ½Ç°è¼ö°¡ Áõ°¡ÇϹǷΠ°úºÎÇÏ ÇÕ·ù¸ÇȦ¿¡¼ÀÇ ¼Õ½Ç°è¼ö´Â Ãø¸é À¯ÀÔ°ü·ÎÀÇ À¯ÀÔÀ¯·®ÀÇ ¿µÇâÀ» Å©°Ô ¹Þ´Â´Ù°í ÆÇ´ÜµÈ´Ù. ¸ÇȦÀÇ Çü»óº¯È ¹× À¯·®º¯È¿¡ µû¸¥ ¼Õ½Ç°è¼ö´Â °ÅÀÇ µ¿ÀÏÇÏ°Ô »êÁ¤µÇ¾ú´Ù. ¶ÇÇÑ, $Q_2/Q_3$¿Í ¼Õ½Ç°è¼öÀÇ °ü°è½ÄÀ» Á¦½ÃÇÏ¿´´Ù. |
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Energy loss at manholes, often exceeding friction loss of pipes under surcharged flow, is considered as one of the major causes of inundation in urban area. Therefore, it is necessary to analyze head losses at manholes, especially in case of surcharged flow. Hydraulic experimental apparatus which can change the manhole shape (square, circular) were installed for this study. In the experiments, two inflows ($Q_1,;Q_2$) were varied from 0 to $4{ell}$/sec and 15 combinations were tested in total. The flow ratios $Q_2/Q_3$ were varied from 0 to 1 for a total flow $Q_3$ ($Q_3=Q_1+Q_3$) of 2, 3, and $4{ell}$/sec, respectively. The variation of head losses were strongly influenced by the lateral inflow because the head loss coefficient increases as the flow ratio $Q_2/Q_3$ increases. There was no significant difference of head loss between square manhole and circular one, and also no large variation of head loss as discharges change. The relation equations between K and $Q_2/Q_3$ were suggested in this paper. |
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ÇÕ·ù¸ÇȦ;¼Õ½Ç°è¼ö;°úºÎÇÏÈ帧;µµ½Ã ¿ì¼ö ¹è¼ö ½Ã½ºÅÛ;combining junction manhole;head loss coefficient;surcharged flow;urban sewer system; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.5, 2010³â, pp.445-453
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201016264960182)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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