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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.2, 1995³â, pp.155-168
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»ç°¢Çü °³¼ö·Î ¸¶Âû°è¼ö
( Friction Factor of Rectangular Open Channel Flow ) |
| À¯µ¿ÈÆ; Á¤È¸¿ø, ¾ÆÁÖ´ëÇб³ Åä¸ñ°øÇаú;
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| º»°í´Â °³¼ö·Î ¸¶Âû°è¼ö¸¦ »êÁ¤Çϰųª ´Ü¸éÆò±ÕÀ¯¼ÓÀ» ±¸ÇÏ´Â ÀüÅëÀûÀÎ ¹æ¹ýÀÇ °æÇè½ÄÀ» ³íÀÇÇÏ¿´À¸¸ç, »õ·Î¿î ÇüÅÂÀÇ »êÁ¤½ÄÀ» Á¦½ÃÇÏ¿´´Ù. ±âÁ¸ °æÇè½ÄÁß ÇüŰ¡ °¡´ÉÇÑ °ÍÀº Â÷¿øÀÇ ÀÏÄ¡¸¦ ±âÇϱâ À§ÇÏ¿© ¼öÁ¤ÇÏ¿´À¸¸ç, µî°¡Á¶°í¸¦ µµÀÔÇÏ¿© »õ·Î¿î ÇüÅÂÀÇ °æÇè½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. °³¼ö·Î¿¡¼ÀÇ ¸¶Âû°è¼ö ºÐÆ÷µµ ¿øÇüÆÇ¿¡¼ÀÇ ¿Ï³·ù ¸¶Âû°è¼ö ºÐÆ÷¿Í À¯»çÇÔÀ» °í·ÁÇÏ¿© ´ëºÎºÐÀÇ °üÃøÀÚ·á´Â ¿Ï³·ù ±¸°£¿¡ µå´Â °ÍÀ¸·Î ÆÇ´ÜÇÏ¿´À¸¸ç, ¿øÇü°ü ¿Ï³·ù ¸¶Âû°è¼ö »êÁ¤½ÄÀ» ¼öÁ¤ÇÏ¿© »ç°¢Çü °³¼ö·Î ¿Ï³·ù ¸¶Âû°è¼ö »êÁ¤½ÄÀ» °³¹ßÇÏ¿´´Ù. ¶ÇÇÑ Â÷¿øÀÇ ÀÏÄ¡¸¦ ÀÌ·é »õ·Î¿î ÇüÅÂÀÇ °æÇè½ÄµéÀ» Æ÷ÇÔÇÏ¿© ÀÌµé »êÁ¤½ÄÀ» BazinÀÇ ½ÇÇèÀÚ·á¿¡ Àû¿ëÇÏ¿© ºñ±³ °ËÅäÇÏ¿´´Ù. |
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| The present paper discusses the traditional empirical equations of friction factor or cross-sectional mean velocity of open channel flow and suggests the new form of friction factor equation. Dimensional analysis is conducted for the possible forms of traditional empirical equations in order to satisfy the dimensional equality, and new forms of empirical equations are presented with introducing equivalent roughness height. Considering the distribution of friction factor against Reynolds number which has a similar characteristics to that of smooth turbulent flow in circular pipe, the friction factor equation of rectangular open channel flow is developed by modifying the friction factor equation of circular pipe flow for the region of smooth turbulent flow. The equations including the dimensionally-corrected empirical equations are tested against Bazin's laboratory experiments. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.2, 1995³â, pp.155-168
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920095562)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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